diff --git a/android/app/build.gradle b/android/app/build.gradle
index 92a79e4d..9f0cb259 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -15,8 +15,8 @@ android {
         }
         minSdkVersion 21
         targetSdkVersion 26
-        versionCode 113
-        versionName "dev113"
+        versionCode 136
+        versionName "dev136"
         externalNativeBuild {
             cmake {
                 arguments "-DANDROID_APP_PLATFORM=android-21", "-DANDROID_STL=c++_static"
diff --git a/demos/misc/lagrange_point_2023_opm.fur b/demos/misc/lagrange_point_2023_opm.fur
new file mode 100644
index 00000000..31832bc9
Binary files /dev/null and b/demos/misc/lagrange_point_2023_opm.fur differ
diff --git a/demos/msx/Lagrange_Point.fur b/demos/msx/Lagrange_Point.fur
deleted file mode 100644
index bff5248c..00000000
Binary files a/demos/msx/Lagrange_Point.fur and /dev/null differ
diff --git a/extern/opl/opl3.c b/extern/opl/opl3.c
index b0a090c5..3358f033 100644
--- a/extern/opl/opl3.c
+++ b/extern/opl/opl3.c
@@ -946,10 +946,8 @@ static void OPL3_ChannelSetupAlg(opl3_channel *channel)
     }
 }
 
-static void OPL3_ChannelWriteC0(opl3_channel *channel, uint8_t data)
+static void OPL3_ChannelUpdateAlg(opl3_channel *channel)
 {
-    channel->fb = (data & 0x0e) >> 1;
-    channel->con = data & 0x01;
     channel->alg = channel->con;
     if (channel->chip->newm)
     {
@@ -974,14 +972,25 @@ static void OPL3_ChannelWriteC0(opl3_channel *channel, uint8_t data)
     {
         OPL3_ChannelSetupAlg(channel);
     }
+}
+
+static void OPL3_ChannelWriteC0(opl3_channel *channel, uint8_t data)
+{
+    channel->fb = (data & 0x0e) >> 1;
+    channel->con = data & 0x01;
+    OPL3_ChannelUpdateAlg(channel);
     if (channel->chip->newm)
     {
         channel->cha = ((data >> 4) & 0x01) ? ~0 : 0;
         channel->chb = ((data >> 5) & 0x01) ? ~0 : 0;
+        channel->chc = ((data >> 6) & 0x01) ? ~0 : 0;
+        channel->chd = ((data >> 7) & 0x01) ? ~0 : 0;
     }
     else
     {
         channel->cha = channel->chb = (uint16_t)~0;
+        // TODO: Verify on real chip if DAC2 output is disabled in compat mode
+        channel->chc = channel->chd = 0;
     }
 #if OPL_ENABLE_STEREOEXT
     if (!channel->chip->stereoext)
@@ -1066,11 +1075,14 @@ static void OPL3_ChannelSet4Op(opl3_chip *chip, uint8_t data)
         {
             chip->channel[chnum].chtype = ch_4op;
             chip->channel[chnum + 3].chtype = ch_4op2;
+            OPL3_ChannelUpdateAlg(&chip->channel[chnum]);
         }
         else
         {
             chip->channel[chnum].chtype = ch_2op;
             chip->channel[chnum + 3].chtype = ch_2op;
+            OPL3_ChannelUpdateAlg(&chip->channel[chnum]);
+            OPL3_ChannelUpdateAlg(&chip->channel[chnum+3]);
         }
     }
 }
@@ -1096,17 +1108,18 @@ static void OPL3_ProcessSlot(opl3_slot *slot)
     OPL3_SlotGenerate(slot);
 }
 
-void OPL3_Generate(opl3_chip *chip, int16_t *buf)
+inline void OPL3_Generate4Ch(opl3_chip *chip, int16_t *buf4)
 {
     opl3_channel *channel;
     opl3_writebuf *writebuf;
     int16_t **out;
-    int32_t mix;
+    int32_t mix[2];
     uint8_t ii;
     int16_t accm;
     uint8_t shift = 0;
 
-    buf[1] = OPL3_ClipSample(chip->mixbuff[1]);
+    buf4[1] = OPL3_ClipSample(chip->mixbuff[1]);
+    buf4[3] = OPL3_ClipSample(chip->mixbuff[3]);
 
 #if OPL_QUIRK_CHANNELSAMPLEDELAY
     for (ii = 0; ii < 15; ii++)
@@ -1117,7 +1130,7 @@ void OPL3_Generate(opl3_chip *chip, int16_t *buf)
         OPL3_ProcessSlot(&chip->slot[ii]);
     }
 
-    mix = 0;
+    mix[0] = mix[1] = 0;
     for (ii = 0; ii < 18; ii++)
     {
         channel = &chip->channel[ii];
@@ -1125,12 +1138,14 @@ void OPL3_Generate(opl3_chip *chip, int16_t *buf)
         out = channel->out;
         accm = *out[0] + *out[1] + *out[2] + *out[3];
 #if OPL_ENABLE_STEREOEXT
-        mix += (int16_t)((accm * channel->leftpan) >> 16);
+        mix[0] += (int16_t)((accm * channel->leftpan) >> 16);
 #else
-        mix += (int16_t)(accm & channel->cha);
-#endif
+        mix[0] += (int16_t)(accm & channel->cha);
+ #endif
+        mix[1] += (int16_t)(accm & channel->chc);
     }
-    chip->mixbuff[0] = mix;
+    chip->mixbuff[0] = mix[0];
+    chip->mixbuff[2] = mix[1];
 
 #if OPL_QUIRK_CHANNELSAMPLEDELAY
     for (ii = 15; ii < 18; ii++)
@@ -1139,7 +1154,8 @@ void OPL3_Generate(opl3_chip *chip, int16_t *buf)
     }
 #endif
 
-    buf[0] = OPL3_ClipSample(chip->mixbuff[0]);
+    buf4[0] = OPL3_ClipSample(chip->mixbuff[0]);
+    buf4[2] = OPL3_ClipSample(chip->mixbuff[2]);
 
 #if OPL_QUIRK_CHANNELSAMPLEDELAY
     for (ii = 18; ii < 33; ii++)
@@ -1148,7 +1164,7 @@ void OPL3_Generate(opl3_chip *chip, int16_t *buf)
     }
 #endif
 
-    mix = 0;
+    mix[0] = mix[1] = 0;
     for (ii = 0; ii < 18; ii++)
     {
         channel = &chip->channel[ii];
@@ -1156,12 +1172,14 @@ void OPL3_Generate(opl3_chip *chip, int16_t *buf)
         out = channel->out;
         accm = *out[0] + *out[1] + *out[2] + *out[3];
 #if OPL_ENABLE_STEREOEXT
-        mix += (int16_t)((accm * channel->rightpan) >> 16);
+        mix[0] += (int16_t)((accm * channel->rightpan) >> 16);
 #else
-        mix += (int16_t)(accm & channel->chb);
-#endif
+        mix[0] += (int16_t)(accm & channel->chb);
+ #endif
+        mix[1] += (int16_t)(accm & channel->chd);
     }
-    chip->mixbuff[1] = mix;
+    chip->mixbuff[1] = mix[0];
+    chip->mixbuff[3] = mix[1];
 
 #if OPL_QUIRK_CHANNELSAMPLEDELAY
     for (ii = 33; ii < 36; ii++)
@@ -1236,22 +1254,44 @@ void OPL3_Generate(opl3_chip *chip, int16_t *buf)
     chip->writebuf_samplecnt++;
 }
 
-void OPL3_GenerateResampled(opl3_chip *chip, int16_t *buf)
+void OPL3_Generate(opl3_chip *chip, int16_t *buf)
+{
+    int16_t samples[4];
+    OPL3_Generate4Ch(chip, samples);
+    buf[0] = samples[0];
+    buf[1] = samples[1];
+}
+
+void OPL3_Generate4ChResampled(opl3_chip *chip, int16_t *buf4)
 {
     while (chip->samplecnt >= chip->rateratio)
     {
         chip->oldsamples[0] = chip->samples[0];
         chip->oldsamples[1] = chip->samples[1];
-        OPL3_Generate(chip, chip->samples);
+        chip->oldsamples[2] = chip->samples[2];
+        chip->oldsamples[3] = chip->samples[3];
+        OPL3_Generate4Ch(chip, chip->samples);
         chip->samplecnt -= chip->rateratio;
     }
-    buf[0] = (int16_t)((chip->oldsamples[0] * (chip->rateratio - chip->samplecnt)
-                     + chip->samples[0] * chip->samplecnt) / chip->rateratio);
-    buf[1] = (int16_t)((chip->oldsamples[1] * (chip->rateratio - chip->samplecnt)
-                     + chip->samples[1] * chip->samplecnt) / chip->rateratio);
+    buf4[0] = (int16_t)((chip->oldsamples[0] * (chip->rateratio - chip->samplecnt)
+                        + chip->samples[0] * chip->samplecnt) / chip->rateratio);
+    buf4[1] = (int16_t)((chip->oldsamples[1] * (chip->rateratio - chip->samplecnt)
+                        + chip->samples[1] * chip->samplecnt) / chip->rateratio);
+    buf4[2] = (int16_t)((chip->oldsamples[2] * (chip->rateratio - chip->samplecnt)
+                        + chip->samples[2] * chip->samplecnt) / chip->rateratio);
+    buf4[3] = (int16_t)((chip->oldsamples[3] * (chip->rateratio - chip->samplecnt)
+                        + chip->samples[3] * chip->samplecnt) / chip->rateratio);
     chip->samplecnt += 1 << RSM_FRAC;
 }
 
+void OPL3_GenerateResampled(opl3_chip *chip, int16_t *buf)
+{
+    int16_t samples[4];
+    OPL3_Generate4ChResampled(chip, samples);
+    buf[0] = samples[0];
+    buf[1] = samples[1];
+}
+
 void OPL3_Reset(opl3_chip *chip, uint32_t samplerate)
 {
     opl3_slot *slot;
@@ -1464,9 +1504,26 @@ void OPL3_WriteRegBuffered(opl3_chip *chip, uint16_t reg, uint8_t v)
     chip->writebuf_last = (writebuf_last + 1) % OPL_WRITEBUF_SIZE;
 }
 
+void OPL3_Generate4ChStream(opl3_chip *chip, int16_t *sndptr1, int16_t *sndptr2, uint32_t numsamples)
+{
+    uint_fast32_t i;
+    int16_t samples[4];
+
+    for(i = 0; i < numsamples; i++)
+    {
+        OPL3_Generate4ChResampled(chip, samples);
+        sndptr1[0] = samples[0];
+        sndptr1[1] = samples[1];
+        sndptr2[0] = samples[2];
+        sndptr2[1] = samples[3];
+        sndptr1 += 2;
+        sndptr2 += 2;
+    }
+}
+
 void OPL3_GenerateStream(opl3_chip *chip, int16_t *sndptr, uint32_t numsamples)
 {
-    uint32_t i;
+    uint_fast32_t i;
 
     for(i = 0; i < numsamples; i++)
     {
diff --git a/extern/opl/opl3.h b/extern/opl/opl3.h
index 6ad33f3e..8d515323 100644
--- a/extern/opl/opl3.h
+++ b/extern/opl/opl3.h
@@ -101,6 +101,7 @@ struct _opl3_channel {
     uint8_t alg;
     uint8_t ksv;
     uint16_t cha, chb;
+    uint16_t chc, chd;
     uint8_t ch_num;
     uint8_t muted;
 };
@@ -129,7 +130,7 @@ struct _opl3_chip {
     uint8_t tremoloshift;
     uint32_t noise;
     int16_t zeromod;
-    int32_t mixbuff[2];
+    int32_t mixbuff[4];
     uint8_t rm_hh_bit2;
     uint8_t rm_hh_bit3;
     uint8_t rm_hh_bit7;
@@ -144,8 +145,8 @@ struct _opl3_chip {
     /* OPL3L */
     int32_t rateratio;
     int32_t samplecnt;
-    int16_t oldsamples[2];
-    int16_t samples[2];
+    int16_t oldsamples[4];
+    int16_t samples[4];
 
     uint64_t writebuf_samplecnt;
     uint32_t writebuf_cur;
@@ -161,6 +162,10 @@ void OPL3_WriteReg(opl3_chip *chip, uint16_t reg, uint8_t v);
 void OPL3_WriteRegBuffered(opl3_chip *chip, uint16_t reg, uint8_t v);
 void OPL3_GenerateStream(opl3_chip *chip, int16_t *sndptr, uint32_t numsamples);
 
+void OPL3_Generate4Ch(opl3_chip *chip, int16_t *buf4);
+void OPL3_Generate4ChResampled(opl3_chip *chip, int16_t *buf4);
+void OPL3_Generate4ChStream(opl3_chip *chip, int16_t *sndptr1, int16_t *sndptr2, uint32_t numsamples);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/papers/format.md b/papers/format.md
index 6765f846..614fb3af 100644
--- a/papers/format.md
+++ b/papers/format.md
@@ -32,6 +32,9 @@ these fields are 0 in format versions prior to 100 (0.6pre1).
 
 the format versions are:
 
+- 136: Furnace dev136
+- 135: Furnace dev135
+- 134: Furnace dev134
 - 133: Furnace 0.6pre3
 - 132: Furnace 0.6pre2
 - 131: Furnace dev131
@@ -386,8 +389,42 @@ size | description
  STR | song author (Japanese)
  STR | system name (Japanese)
  STR | album/category/game name (Japanese)
+ --- | **extra chip output settings (× chipCount)** (>=135)
+  4f | chip volume
+  4f | chip panning
+  4f | chip front/rear balance
+ --- | **patchbay** (>=135)
+  4  | patchbay connection count
+ 4?? | patchbay
+     | - see next section for more details.
+  1  | automatic patchbay (>=136)
 ```
 
+# patchbay
+
+Furnace dev135 adds a "patchbay" which allows for arbitrary connection of chip outputs to system outputs.
+it eventually will allow connecting outputs to effects and so on.
+
+a connection is represented as an unsigned int in the following format:
+
+- bit 16-31: source port
+- bit 0-15: destination port
+
+a port is in the following format (hexadecimal): `xxxy`
+
+- `xxx` (bit 4 to 15) represents a portset.
+- `y` (bit 0 to 3) is the port in that portset.
+
+reserved input portsets:
+- `000`: system outputs
+- `FFF`: "null" portset
+
+reserved output portsets:
+- `000` through `01F`: chip outputs
+- `FFD`: wave/sample preview
+- `FFE`: metronome
+- `FFF`: "null" portset
+
 # subsong
 
 from version 95 onwards, Furnace supports storing multiple songs on a single file.
diff --git a/src/engine/defines.h b/src/engine/defines.h
index 2cd4b692..3461a52d 100644
--- a/src/engine/defines.h
+++ b/src/engine/defines.h
@@ -33,4 +33,7 @@
 // sample related
 #define DIV_MAX_SAMPLE_TYPE 4
 
+// dispatch
+#define DIV_MAX_OUTPUTS 16
+
 #endif
diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index 566d5753..0c958916 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -225,6 +225,8 @@ enum DivDispatchCmds {
   DIV_CMD_ES5506_ENVELOPE_K2RAMP, // (ramp, slowdown)
   DIV_CMD_ES5506_PAUSE, // (value)
 
+  DIV_CMD_SURROUND_PANNING, // (out, val)
+
   DIV_ALWAYS_SET_VOLUME, // () -> alwaysSetVol
 
   DIV_CMD_MAX
@@ -334,12 +336,10 @@ class DivDispatch {
 
     /**
      * fill a buffer with sound data.
-     * @param bufL the left or mono channel buffer.
-     * @param bufR the right channel buffer.
-     * @param start the start offset.
+     * @param buf pointers to output buffers.
      * @param len the amount of samples to fill.
      */
-    virtual void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    virtual void acquire(short** buf, size_t len);
 
     /**
      * fill a write stream with data (e.g. for software-mixed PCM).
@@ -425,10 +425,10 @@ class DivDispatch {
     virtual void muteChannel(int ch, bool mute);
 
     /**
-     * test whether this dispatch outputs audio in two channels.
-     * @return whether it does.
+     * get the number of outputs this dispatch provides.
+     * @return number of outputs (usually 1 or 2 but may be more). SHALL NOT be less than one.
      */
-    virtual bool isStereo();
+    virtual int getOutputCount();
 
     /**
      * test whether sending a key off command to a channel should reset arp too.
diff --git a/src/engine/dispatchContainer.cpp b/src/engine/dispatchContainer.cpp
index be848050..7e4eba5d 100644
--- a/src/engine/dispatchContainer.cpp
+++ b/src/engine/dispatchContainer.cpp
@@ -81,79 +81,131 @@
 #include "song.h"
 
 void DivDispatchContainer::setRates(double gotRate) {
-  blip_set_rates(bb[0],dispatch->rate,gotRate);
-  blip_set_rates(bb[1],dispatch->rate,gotRate);
+  int outs=dispatch->getOutputCount();
+
+  for (int i=0; i<outs; i++) {
+    if (bb[i]==NULL) continue;
+    blip_set_rates(bb[i],dispatch->rate,gotRate);
+  }
+  rateMemory=gotRate;
 }
 
 void DivDispatchContainer::setQuality(bool lowQual) {
   lowQuality=lowQual;
 }
 
+void DivDispatchContainer::grow(size_t size) {
+  bbInLen=size;
+  for (int i=0; i<DIV_MAX_OUTPUTS; i++) {
+    if (bbIn[i]!=NULL) {
+      delete[] bbIn[i];
+      bbIn[i]=new short[bbInLen];
+    }
+  }
+}
+
+#define CHECK_MISSING_BUFS \
+  int outs=dispatch->getOutputCount(); \
+ \
+  /* create missing buffers if any */ \
+  bool mustClear=false; \
+  for (int i=0; i<outs; i++) { \
+    if (bb[i]==NULL) { \
+      logV("creating buf %d because it doesn't exist",i); \
+      bb[i]=blip_new(bbInLen); \
+      if (bb[i]==NULL) { \
+        logE("not enough memory!"); \
+        return; \
+      } \
+      blip_set_rates(bb[i],dispatch->rate,rateMemory); \
+ \
+      if (bbIn[i]==NULL) bbIn[i]=new short[bbInLen]; \
+      if (bbOut[i]==NULL) bbOut[i]=new short[bbInLen]; \
+      memset(bbIn[i],0,bbInLen*sizeof(short)); \
+      memset(bbOut[i],0,bbInLen*sizeof(short)); \
+      mustClear=true; \
+    } \
+  } \
+  if (mustClear) clear(); \
+
 void DivDispatchContainer::acquire(size_t offset, size_t count) {
-  dispatch->acquire(bbIn[0],bbIn[1],offset,count);
+  CHECK_MISSING_BUFS;
+
+  for (int i=0; i<DIV_MAX_OUTPUTS; i++) {
+    if (i>=outs) {
+      bbInMapped[i]=NULL;
+    } else {
+      if (bbIn[i]==NULL) {
+        bbInMapped[i]=NULL;
+      } else {
+        bbInMapped[i]=&bbIn[i][offset];
+      }
+    }
+  }
+  dispatch->acquire(bbInMapped,count);
 }
 
 void DivDispatchContainer::flush(size_t count) {
-  blip_read_samples(bb[0],bbOut[0],count,0);
+  int outs=dispatch->getOutputCount();
 
-  if (dispatch->isStereo()) {
-    blip_read_samples(bb[1],bbOut[1],count,0);
+  for (int i=0; i<outs; i++) {
+    if (bb[i]==NULL) continue;
+    blip_read_samples(bb[i],bbOut[i],count,0);
   }
 }
 
 void DivDispatchContainer::fillBuf(size_t runtotal, size_t offset, size_t size) {
+  CHECK_MISSING_BUFS;
+
   if (dcOffCompensation && runtotal>0) {
     dcOffCompensation=false;
-    prevSample[0]=bbIn[0][0];
-    if (dispatch->isStereo()) prevSample[1]=bbIn[1][0];
+    for (int i=0; i<outs; i++) {
+      if (bbIn[i]==NULL) continue;
+      prevSample[i]=bbIn[i][0];
+    }
   }
   if (lowQuality) {
-    for (size_t i=0; i<runtotal; i++) {
-      temp[0]=bbIn[0][i];
-      blip_add_delta_fast(bb[0],i,temp[0]-prevSample[0]);
-      prevSample[0]=temp[0];
-    }
-
-    if (dispatch->isStereo()) for (size_t i=0; i<runtotal; i++) {
-      temp[1]=bbIn[1][i];
-      blip_add_delta_fast(bb[1],i,temp[1]-prevSample[1]);
-      prevSample[1]=temp[1];
+    for (int i=0; i<outs; i++) {
+      if (bbIn[i]==NULL) continue;
+      if (bb[i]==NULL) continue;
+      for (size_t j=0; j<runtotal; j++) {
+        temp[i]=bbIn[i][j];
+        blip_add_delta_fast(bb[i],j,temp[i]-prevSample[i]);
+        prevSample[i]=temp[i];
+      }
     }
   } else {
-    for (size_t i=0; i<runtotal; i++) {
-      temp[0]=bbIn[0][i];
-      blip_add_delta(bb[0],i,temp[0]-prevSample[0]);
-      prevSample[0]=temp[0];
-    }
-
-    if (dispatch->isStereo()) for (size_t i=0; i<runtotal; i++) {
-      temp[1]=bbIn[1][i];
-      blip_add_delta(bb[1],i,temp[1]-prevSample[1]);
-      prevSample[1]=temp[1];
+    for (int i=0; i<outs; i++) {
+      if (bbIn[i]==NULL) continue;
+      if (bb[i]==NULL) continue;
+      for (size_t j=0; j<runtotal; j++) {
+        temp[i]=bbIn[i][j];
+        blip_add_delta(bb[i],j,temp[i]-prevSample[i]);
+        prevSample[i]=temp[i];
+      }
     }
   }
 
-  blip_end_frame(bb[0],runtotal);
-  blip_read_samples(bb[0],bbOut[0]+offset,size,0);
+  for (int i=0; i<outs; i++) {
+    if (bbOut[i]==NULL) continue;
+    if (bb[i]==NULL) continue;
+    blip_end_frame(bb[i],runtotal);
+    blip_read_samples(bb[i],bbOut[i]+offset,size,0);
+  }
   /*if (totalRead<(int)size && totalRead>0) {
     for (size_t i=totalRead; i<size; i++) {
       bbOut[0][i]=bbOut[0][totalRead-1];//bbOut[0][totalRead];
     }
   }*/
-
-  if (dispatch->isStereo()) {
-    blip_end_frame(bb[1],runtotal);
-    blip_read_samples(bb[1],bbOut[1]+offset,size,0);
-  }
 }
 
 void DivDispatchContainer::clear() {
-  blip_clear(bb[0]);
-  blip_clear(bb[1]);
-  temp[0]=0;
-  temp[1]=0;
-  prevSample[0]=0;
-  prevSample[1]=0;
+  for (int i=0; i<DIV_MAX_OUTPUTS; i++) {
+    if (bb[i]!=NULL) blip_clear(bb[i]);
+    temp[i]=0;
+    prevSample[i]=0;
+  }
+
   if (dispatch->getDCOffRequired()) {
     dcOffCompensation=true;
   }
@@ -167,26 +219,10 @@ void DivDispatchContainer::clear() {
 }
 
 void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, double gotRate, const DivConfig& flags) {
+  // quit if we already initialized
   if (dispatch!=NULL) return;
 
-  bb[0]=blip_new(32768);
-  if (bb[0]==NULL) {
-    logE("not enough memory!");
-    return;
-  }
-
-  bb[1]=blip_new(32768);
-  if (bb[1]==NULL) {
-    logE("not enough memory!");
-    return;
-  }
-
-  bbOut[0]=new short[32768];
-  bbOut[1]=new short[32768];
-  bbIn[0]=new short[32768];
-  bbIn[1]=new short[32768];
-  bbInLen=32768;
-
+  // initialize chip
   switch (sys) {
     case DIV_SYSTEM_YMU759:
       dispatch=new DivPlatformOPL;
@@ -465,6 +501,23 @@ void DivDispatchContainer::init(DivSystem sys, DivEngine* eng, int chanCount, do
       break;
   }
   dispatch->init(eng,chanCount,gotRate,flags);
+
+  // initialize output buffers
+  int outs=dispatch->getOutputCount();
+  bbInLen=32768;
+
+  for (int i=0; i<outs; i++) {
+    bb[i]=blip_new(bbInLen);
+    if (bb[i]==NULL) {
+      logE("not enough memory!");
+      return;
+    }
+
+    bbIn[i]=new short[bbInLen];
+    bbOut[i]=new short[bbInLen];
+    memset(bbIn[i],0,bbInLen*sizeof(short));
+    memset(bbOut[i],0,bbInLen*sizeof(short));
+  }
 }
 
 void DivDispatchContainer::quit() {
@@ -473,11 +526,19 @@ void DivDispatchContainer::quit() {
   delete dispatch;
   dispatch=NULL;
 
-  delete[] bbOut[0];
-  delete[] bbOut[1];
-  delete[] bbIn[0];
-  delete[] bbIn[1];
+  for (int i=0; i<DIV_MAX_OUTPUTS; i++) {
+    if (bbOut[i]!=NULL) {
+      delete[] bbOut[i];
+      bbOut[i]=NULL;
+    }
+    if (bbIn[i]!=NULL) {
+      delete[] bbIn[i];
+      bbIn[i]=NULL;
+    }
+    if (bb[i]!=NULL) {
+      blip_delete(bb[i]);
+      bb[i]=NULL;
+    }
+  }
   bbInLen=0;
-  blip_delete(bb[0]);
-  blip_delete(bb[1]);
 }
diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 616e3e22..7c4896ba 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -77,6 +77,15 @@ const char* DivEngine::getEffectDesc(unsigned char effect, int chan, bool notNul
       return "81xx: Set panning (left channel)";
     case 0x82:
       return "82xx: Set panning (right channel)";
+    case 0x88:
+      return "88xx: Set panning (rear channels; x: left; y: right)";
+      break;
+    case 0x89:
+      return "89xx: Set panning (rear left channel)";
+      break;
+    case 0x8a:
+      return "8Axx: Set panning (rear right channel)";
+      break;
     case 0xc0: case 0xc1: case 0xc2: case 0xc3:
       return "Cxxx: Set tick rate (hz)";
     case 0xe0:
@@ -435,6 +444,7 @@ void writePackedCommandValues(SafeWriter* w, const DivCommand& c) {
     case DIV_CMD_FM_FINE:
     case DIV_CMD_AY_IO_WRITE:
     case DIV_CMD_AY_AUTO_PWM:
+    case DIV_CMD_SURROUND_PANNING:
       w->writeC(2); // length
       w->writeC(c.value);
       w->writeC(c.value2);
@@ -897,11 +907,7 @@ void DivEngine::runExportThread() {
       for (int i=0; i<song.systemLen; i++) {
         sf[i]=NULL;
         si[i].samplerate=got.rate;
-        if (disCont[i].dispatch->isStereo()) {
-          si[i].channels=2;
-        } else {
-          si[i].channels=1;
-        }
+        si[i].channels=disCont[i].dispatch->getOutputCount();
         si[i].format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
       }
 
@@ -944,11 +950,12 @@ void DivEngine::runExportThread() {
           if (isFadingOut) {
             double mul=(1.0-((double)curFadeOutSample/(double)fadeOutSamples));
             for (int i=0; i<song.systemLen; i++) {
-              if (!disCont[i].dispatch->isStereo()) {
-                sysBuf[i][j]=(double)disCont[i].bbOut[0][j]*mul;
-              } else {
-                sysBuf[i][j<<1]=(double)disCont[i].bbOut[0][j]*mul;
-                sysBuf[i][1+(j<<1)]=(double)disCont[i].bbOut[1][j]*mul;
+              for (int k=0; k<si[i].channels; k++) {
+                if (disCont[i].bbOut[k]==NULL) {
+                  sysBuf[i][k+(j*si[i].channels)]=0;
+                } else {
+                  sysBuf[i][k+(j*si[i].channels)]=(double)disCont[i].bbOut[k][j]*mul;
+                }
               }
             }
             if (++curFadeOutSample>=fadeOutSamples) {
@@ -957,11 +964,12 @@ void DivEngine::runExportThread() {
             }
           } else {
             for (int i=0; i<song.systemLen; i++) {
-              if (!disCont[i].dispatch->isStereo()) {
-                sysBuf[i][j]=disCont[i].bbOut[0][j];
-              } else {
-                sysBuf[i][j<<1]=disCont[i].bbOut[0][j];
-                sysBuf[i][1+(j<<1)]=disCont[i].bbOut[1][j];
+              for (int k=0; k<si[i].channels; k++) {
+                if (disCont[i].bbOut[k]==NULL) {
+                  sysBuf[i][k+(j*si[i].channels)]=0;
+                } else {
+                  sysBuf[i][k+(j*si[i].channels)]=disCont[i].bbOut[k][j];
+                }
               }
             }
             if (lastLoopPos>-1 && j>=lastLoopPos && totalLoops>=exportLoopCount) {
@@ -1333,8 +1341,8 @@ String DivEngine::decodeSysDesc(String desc) {
   int val=0;
   int curStage=0;
   int sysID=0;
-  int sysVol=0;
-  int sysPan=0;
+  float sysVol=0;
+  float sysPan=0;
   int sysFlags=0;
   int curSys=0;
   desc+=' '; // ha
@@ -1349,24 +1357,25 @@ String DivEngine::decodeSysDesc(String desc) {
               curStage++;
               break;
             case 1:
-              sysVol=val;
+              sysVol=(float)val/64.0f;
               curStage++;
               break;
             case 2:
-              sysPan=val;
+              sysPan=(float)val/127.0f;
               curStage++;
               break;
             case 3:
               sysFlags=val;
 
               if (sysID!=0) {
-                if (sysVol<-128) sysVol=-128;
-                if (sysVol>127) sysVol=127;
-                if (sysPan<-128) sysPan=-128;
-                if (sysPan>127) sysPan=127;
+                if (sysVol<-1.0f) sysVol=-1.0f;
+                if (sysVol>1.0f) sysVol=1.0f;
+                if (sysPan<-1.0f) sysPan=-1.0f;
+                if (sysPan>1.0f) sysPan=1.0f;
                 newDesc.set(fmt::sprintf("id%d",curSys),sysID);
                 newDesc.set(fmt::sprintf("vol%d",curSys),sysVol);
                 newDesc.set(fmt::sprintf("pan%d",curSys),sysPan);
+                newDesc.set(fmt::sprintf("fr%d",curSys),0.0f);
                 DivConfig newFlagsC;
                 newFlagsC.clear();
                 convertOldFlags((unsigned int)sysFlags,newFlagsC,systemFromFileFur(sysID));
@@ -1396,7 +1405,7 @@ String DivEngine::decodeSysDesc(String desc) {
   return newDesc.toBase64();
 }
 
-void DivEngine::initSongWithDesc(const char* description, bool inBase64) {
+void DivEngine::initSongWithDesc(const char* description, bool inBase64, bool oldVol) {
   int chanCount=0;
   DivConfig c;
   if (inBase64) {
@@ -1415,9 +1424,16 @@ void DivEngine::initSongWithDesc(const char* description, bool inBase64) {
       song.system[index]=DIV_SYSTEM_NULL;
       break;
     }
-    song.systemVol[index]=c.getInt(fmt::sprintf("vol%d",index),DIV_SYSTEM_NULL);
-    song.systemPan[index]=c.getInt(fmt::sprintf("pan%d",index),DIV_SYSTEM_NULL);
+    song.systemVol[index]=c.getFloat(fmt::sprintf("vol%d",index),1.0f);
+    song.systemPan[index]=c.getFloat(fmt::sprintf("pan%d",index),0.0f);
+    song.systemPanFR[index]=c.getFloat(fmt::sprintf("fr%d",index),0.0f);
     song.systemFlags[index].clear();
+
+    if (oldVol) {
+      song.systemVol[index]/=64.0f;
+      song.systemPan[index]/=127.0f;
+    }
+
     String flags=c.getString(fmt::sprintf("flags%d",index),"");
     song.systemFlags[index].loadFromBase64(flags.c_str());
   }
@@ -1667,14 +1683,36 @@ bool DivEngine::addSystem(DivSystem which) {
   BUSY_BEGIN;
   saveLock.lock();
   song.system[song.systemLen]=which;
-  song.systemVol[song.systemLen]=64;
+  song.systemVol[song.systemLen]=1.0;
   song.systemPan[song.systemLen]=0;
+  song.systemPanFR[song.systemLen]=0;
   song.systemFlags[song.systemLen++].clear();
   recalcChans();
   saveLock.unlock();
   BUSY_END;
   initDispatch();
   BUSY_BEGIN;
+  saveLock.lock();
+  if (song.patchbayAuto) {
+    autoPatchbay();
+  } else {
+    int i=song.systemLen-1;
+    if (disCont[i].dispatch!=NULL) {
+      unsigned int outs=disCont[i].dispatch->getOutputCount();
+      if (outs>16) outs=16;
+      if (outs<2) {
+        for (unsigned int j=0; j<DIV_MAX_OUTPUTS; j++) {
+          song.patchbay.push_back((i<<20)|j);
+        }
+      } else {
+        for (unsigned int j=0; j<outs; j++) {
+
+          song.patchbay.push_back((i<<20)|(j<<16)|j);
+        }
+      }
+    }
+  }
+  saveLock.unlock();
   renderSamples();
   reset();
   BUSY_END;
@@ -1707,12 +1745,21 @@ bool DivEngine::removeSystem(int index, bool preserveOrder) {
     }
   }
 
+  // patchbay
+  for (size_t i=0; i<song.patchbay.size(); i++) {
+    if (((song.patchbay[i]>>20)&0xfff)==(unsigned int)index) {
+      song.patchbay.erase(song.patchbay.begin()+i);
+      i--;
+    }
+  }
+
   song.system[index]=DIV_SYSTEM_NULL;
   song.systemLen--;
   for (int i=index; i<song.systemLen; i++) {
     song.system[i]=song.system[i+1];
     song.systemVol[i]=song.systemVol[i+1];
     song.systemPan[i]=song.systemPan[i+1];
+    song.systemPanFR[i]=song.systemPanFR[i+1];
     song.systemFlags[i]=song.systemFlags[i+1];
   }
   recalcChans();
@@ -1827,23 +1874,36 @@ bool DivEngine::swapSystem(int src, int dest, bool preserveOrder) {
   }
 
   DivSystem srcSystem=song.system[src];
+  float srcVol=song.systemVol[src];
+  float srcPan=song.systemPan[src];
+  float srcPanFR=song.systemPanFR[src];
 
   song.system[src]=song.system[dest];
   song.system[dest]=srcSystem;
 
-  song.systemVol[src]^=song.systemVol[dest];
-  song.systemVol[dest]^=song.systemVol[src];
-  song.systemVol[src]^=song.systemVol[dest];
+  song.systemVol[src]=song.systemVol[dest];
+  song.systemVol[dest]=srcVol;
 
-  song.systemPan[src]^=song.systemPan[dest];
-  song.systemPan[dest]^=song.systemPan[src];
-  song.systemPan[src]^=song.systemPan[dest];
+  song.systemPan[src]=song.systemPan[dest];
+  song.systemPan[dest]=srcPan;
+
+  song.systemPanFR[src]=song.systemPanFR[dest];
+  song.systemPanFR[dest]=srcPanFR;
 
   // I am kinda scared to use std::swap
   DivConfig oldFlags=song.systemFlags[src];
   song.systemFlags[src]=song.systemFlags[dest];
   song.systemFlags[dest]=oldFlags;
 
+  // patchbay
+  for (unsigned int& i: song.patchbay) {
+    if (((i>>20)&0xfff)==(unsigned int)src) {
+      i=(i&(~0xfff00000))|((unsigned int)dest<<20);
+    } else if (((i>>20)&0xfff)==(unsigned int)dest) {
+      i=(i&(~0xfff00000))|((unsigned int)src<<20);
+    }
+  }
+
   recalcChans();
   saveLock.unlock();
   BUSY_END;
@@ -1904,10 +1964,11 @@ String DivEngine::getPlaybackDebugInfo() {
     "speed1: %d\n"
     "speed2: %d\n"
     "tempoAccum: %d\n"
-    "totalProcessed: %d\n",
+    "totalProcessed: %d\n"
+    "bufferPos: %d\n",
     curOrder,prevOrder,curRow,prevRow,ticks,subticks,totalLoops,lastLoopPos,nextSpeed,divider,cycles,clockDrift,
     changeOrd,changePos,totalSeconds,totalTicks,totalTicksR,totalCmds,lastCmds,cmdsPerSecond,globalPitch,
-    (int)extValue,(int)speed1,(int)speed2,(int)tempoAccum,(int)totalProcessed
+    (int)extValue,(int)speed1,(int)speed2,(int)tempoAccum,(int)totalProcessed,(int)bufferPos
   );
 }
 
@@ -3752,6 +3813,102 @@ bool DivEngine::moveSampleDown(int which) {
   return true;
 }
 
+void DivEngine::autoPatchbay() {
+  song.patchbay.clear();
+  for (unsigned int i=0; i<song.systemLen; i++) {
+    if (disCont[i].dispatch==NULL) continue;
+
+    unsigned int outs=disCont[i].dispatch->getOutputCount();
+    if (outs>16) outs=16;
+    if (outs<2) {
+      for (unsigned int j=0; j<DIV_MAX_OUTPUTS; j++) {
+        song.patchbay.push_back((i<<20)|j);
+      }
+    } else {
+      for (unsigned int j=0; j<outs; j++) {
+
+        song.patchbay.push_back((i<<20)|(j<<16)|j);
+      }
+    }
+  }
+
+  // wave/sample preview
+  for (unsigned int j=0; j<DIV_MAX_OUTPUTS; j++) {
+    song.patchbay.push_back(0xffd00000|j);
+  }
+
+  // metronome
+  for (unsigned int j=0; j<DIV_MAX_OUTPUTS; j++) {
+    song.patchbay.push_back(0xffe00000|j);
+  }
+}
+
+void DivEngine::autoPatchbayP() {
+  BUSY_BEGIN;
+  saveLock.lock();
+  autoPatchbay();
+  saveLock.unlock();
+  BUSY_END;
+}
+
+bool DivEngine::patchConnect(unsigned int src, unsigned int dest) {
+  unsigned int armed=(src<<16)|(dest&0xffff);
+  for (unsigned int i: song.patchbay) {
+    if (i==armed) return false;
+  }
+  BUSY_BEGIN;
+  saveLock.lock();
+  song.patchbay.push_back(armed);
+  song.patchbayAuto=false;
+  saveLock.unlock();
+  BUSY_END;
+  return true;
+}
+
+bool DivEngine::patchDisconnect(unsigned int src, unsigned int dest) {
+  unsigned int armed=(src<<16)|(dest&0xffff);
+  for (auto i=song.patchbay.begin(); i!=song.patchbay.end(); i++) {
+    if (*i==armed) {
+      BUSY_BEGIN;
+      saveLock.lock();
+      song.patchbay.erase(i);
+      song.patchbayAuto=false;
+      saveLock.unlock();
+      BUSY_END;
+      return true;
+    }
+  }
+  return false;
+}
+
+void DivEngine::patchDisconnectAll(unsigned int portSet) {
+  BUSY_BEGIN;
+  saveLock.lock();
+
+  if (portSet&0x1000) {
+    portSet&=0xfff;
+
+    for (size_t i=0; i<song.patchbay.size(); i++) {
+      if ((song.patchbay[i]&0xfff0)==(portSet<<4)) {
+        song.patchbay.erase(song.patchbay.begin()+i);
+        i--;
+      }
+    }
+  } else {
+    portSet&=0xfff;
+
+    for (size_t i=0; i<song.patchbay.size(); i++) {
+      if ((song.patchbay[i]&0xfff00000)==(portSet<<20)) {
+        song.patchbay.erase(song.patchbay.begin()+i);
+        i--;
+      }
+    }
+  }
+
+  saveLock.unlock();
+  BUSY_END;
+}
+
 void DivEngine::noteOn(int chan, int ins, int note, int vol) {
   if (chan<0 || chan>=chans) return;
   BUSY_BEGIN;
@@ -3891,6 +4048,14 @@ void DivEngine::updateSysFlags(int system, bool restart) {
   BUSY_BEGIN_SOFT;
   disCont[system].dispatch->setFlags(song.systemFlags[system]);
   disCont[system].setRates(got.rate);
+
+  // patchbay
+  if (song.patchbayAuto) {
+    saveLock.lock();
+    autoPatchbay();
+    saveLock.unlock();
+  }
+
   if (restart && isPlaying()) {
     playSub(false);
   }
@@ -4055,6 +4220,11 @@ void DivEngine::initDispatch() {
     disCont[i].setRates(got.rate);
     disCont[i].setQuality(lowQuality);
   }
+  if (song.patchbayAuto) {
+    saveLock.lock();
+    autoPatchbay();
+    saveLock.unlock();
+  }
   recalcChans();
   BUSY_END;
 }
@@ -4153,10 +4323,13 @@ bool DivEngine::initAudioBackend() {
   want.rate=getConfInt("audioRate",44100);
   want.fragments=2;
   want.inChans=0;
-  want.outChans=2;
+  want.outChans=getConfInt("audioChans",2);
   want.outFormat=TA_AUDIO_FORMAT_F32;
   want.name="Furnace";
 
+  if (want.outChans<1) want.outChans=1;
+  if (want.outChans>16) want.outChans=16;
+
   output->setCallback(process,this);
 
   if (!output->init(want,got)) {
@@ -4167,6 +4340,13 @@ bool DivEngine::initAudioBackend() {
     return false;
   }
 
+  for (int i=0; i<got.outChans; i++) {
+    if (oscBuf[i]==NULL) {
+      oscBuf[i]=new float[32768];
+    }
+    memset(oscBuf[i],0,32768*sizeof(float));
+  }
+
   if (output->initMidi(false)) {
     midiIns=output->midiIn->listDevices();
     midiOuts=output->midiOut->listDevices();
@@ -4248,13 +4428,15 @@ bool DivEngine::init() {
   if (!hasLoadedSomething) {
     logD("setting default preset");
     String preset=getConfString("initialSys2","");
+    bool oldVol=getConfInt("configVersion",DIV_ENGINE_VERSION)<135;
     if (preset.empty()) {
       // try loading old preset
       preset=decodeSysDesc(getConfString("initialSys",""));
+      oldVol=false;
     }
     logD("preset size %ld",preset.size());
     if (preset.size()>0 && (preset.size()&3)==0) {
-      initSongWithDesc(preset.c_str());
+      initSongWithDesc(preset.c_str(),true,oldVol);
     }
     String sysName=getConfString("initialSysName","");
     if (sysName=="") {
@@ -4283,6 +4465,9 @@ bool DivEngine::init() {
 
   samp_bbIn=new short[32768];
   samp_bbInLen=32768;
+
+  metroBuf=new float[8192];
+  metroBufLen=8192;
   
   blip_set_rates(samp_bb,44100,got.rate);
 
@@ -4299,12 +4484,6 @@ bool DivEngine::init() {
     keyHit[i]=false;
   }
 
-  oscBuf[0]=new float[32768];
-  oscBuf[1]=new float[32768];
-
-  memset(oscBuf[0],0,32768*sizeof(float));
-  memset(oscBuf[1],0,32768*sizeof(float));
-
   initDispatch();
   renderSamples();
   reset();
@@ -4313,6 +4492,10 @@ bool DivEngine::init() {
   if (!haveAudio) {
     return false;
   } else {
+    if (output==NULL) {
+      logE("output is NULL!");
+      return false;
+    }
     if (!output->setRun(true)) {
       logE("error while activating!");
       return false;
@@ -4327,8 +4510,14 @@ bool DivEngine::quit() {
   logI("saving config.");
   saveConf();
   active=false;
-  delete[] oscBuf[0];
-  delete[] oscBuf[1];
+  for (int i=0; i<DIV_MAX_OUTPUTS; i++) {
+    if (oscBuf[i]!=NULL) delete[] oscBuf[i];
+  }
+  if (metroBuf!=NULL) {
+    delete[] metroBuf;
+    metroBuf=NULL;
+    metroBufLen=0;
+  }
   if (yrw801ROM!=NULL) delete[] yrw801ROM;
   if (tg100ROM!=NULL) delete[] tg100ROM;
   if (mu5ROM!=NULL) delete[] mu5ROM;
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 7eb5c00c..31edc8c8 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -47,8 +47,8 @@
 #define BUSY_BEGIN_SOFT softLocked=true; isBusy.lock();
 #define BUSY_END isBusy.unlock(); softLocked=false;
 
-#define DIV_VERSION "0.6pre3"
-#define DIV_ENGINE_VERSION 133
+#define DIV_VERSION "dev136"
+#define DIV_ENGINE_VERSION 136
 // for imports
 #define DIV_VERSION_MOD 0xff01
 #define DIV_VERSION_FC 0xff02
@@ -97,7 +97,7 @@ struct DivChannelState {
   int delayOrder, delayRow, retrigSpeed, retrigTick;
   int vibratoDepth, vibratoRate, vibratoPos, vibratoPosGiant, vibratoDir, vibratoFine;
   int tremoloDepth, tremoloRate, tremoloPos;
-  unsigned char arp, arpStage, arpTicks, panL, panR;
+  unsigned char arp, arpStage, arpTicks, panL, panR, panRL, panRR;
   bool doNote, legato, portaStop, keyOn, keyOff, nowYouCanStop, stopOnOff;
   bool arpYield, delayLocked, inPorta, scheduledSlideReset, shorthandPorta, wasShorthandPorta, noteOnInhibit, resetArp;
 
@@ -135,6 +135,8 @@ struct DivChannelState {
     arpTicks(1),
     panL(255),
     panR(255),
+    panRL(0),
+    panRR(0),
     doNote(false),
     legato(false),
     portaStop(false),
@@ -170,15 +172,18 @@ struct DivNoteEvent {
 
 struct DivDispatchContainer {
   DivDispatch* dispatch;
-  blip_buffer_t* bb[2];
+  blip_buffer_t* bb[DIV_MAX_OUTPUTS];
   size_t bbInLen, runtotal, runLeft, runPos, lastAvail;
-  int temp[2], prevSample[2];
-  short* bbIn[2];
-  short* bbOut[2];
+  int temp[DIV_MAX_OUTPUTS], prevSample[DIV_MAX_OUTPUTS];
+  short* bbInMapped[DIV_MAX_OUTPUTS];
+  short* bbIn[DIV_MAX_OUTPUTS];
+  short* bbOut[DIV_MAX_OUTPUTS];
   bool lowQuality, dcOffCompensation;
+  double rateMemory;
 
   void setRates(double gotRate);
   void setQuality(bool lowQual);
+  void grow(size_t size);
   void acquire(size_t offset, size_t count);
   void flush(size_t count);
   void fillBuf(size_t runtotal, size_t offset, size_t size);
@@ -187,18 +192,21 @@ struct DivDispatchContainer {
   void quit();
   DivDispatchContainer():
     dispatch(NULL),
-    bb{NULL,NULL},
     bbInLen(0),
     runtotal(0),
     runLeft(0),
     runPos(0),
     lastAvail(0),
-    temp{0,0},
-    prevSample{0,0},
-    bbIn{NULL,NULL},
-    bbOut{NULL,NULL},
     lowQuality(false),
-    dcOffCompensation(false) {}
+    dcOffCompensation(false),
+    rateMemory(0.0) {
+    memset(bb,0,DIV_MAX_OUTPUTS*sizeof(blip_buffer_t*));
+    memset(temp,0,DIV_MAX_OUTPUTS*sizeof(int));
+    memset(prevSample,0,DIV_MAX_OUTPUTS*sizeof(int));
+    memset(bbIn,0,DIV_MAX_OUTPUTS*sizeof(short*));
+    memset(bbInMapped,0,DIV_MAX_OUTPUTS*sizeof(short*));
+    memset(bbOut,0,DIV_MAX_OUTPUTS*sizeof(short*));
+  }
 };
 
 typedef int EffectValConversion(unsigned char,unsigned char);
@@ -353,6 +361,7 @@ class DivEngine {
   int softLockCount;
   int subticks, ticks, curRow, curOrder, prevRow, prevOrder, remainingLoops, totalLoops, lastLoopPos, exportLoopCount, nextSpeed, elapsedBars, elapsedBeats;
   size_t curSubSongIndex;
+  size_t bufferPos;
   double divider;
   int cycles;
   double clockDrift;
@@ -418,6 +427,8 @@ class DivEngine {
   short* samp_bbOut;
   unsigned char* metroTick;
   size_t metroTickLen;
+  float* metroBuf;
+  size_t metroBufLen;
   float metroFreq, metroPos;
   float metroAmp;
   float metroVol;
@@ -467,7 +478,7 @@ class DivEngine {
   bool deinitAudioBackend(bool dueToSwitchMaster=false);
 
   void registerSystems();
-  void initSongWithDesc(const char* description, bool inBase64=true);
+  void initSongWithDesc(const char* description, bool inBase64=true, bool oldVol=false);
 
   void exchangeIns(int one, int two);
   void swapChannels(int src, int dest);
@@ -486,7 +497,7 @@ class DivEngine {
     int dispatchOfChan[DIV_MAX_CHANS];
     int dispatchChanOfChan[DIV_MAX_CHANS];
     bool keyHit[DIV_MAX_CHANS];
-    float* oscBuf[2];
+    float* oscBuf[DIV_MAX_OUTPUTS];
     float oscSize;
     int oscReadPos, oscWritePos;
     int tickMult;
@@ -826,6 +837,21 @@ class DivEngine {
     bool moveWaveDown(int which);
     bool moveSampleDown(int which);
 
+    // automatic patchbay
+    void autoPatchbay();
+    void autoPatchbayP();
+
+    // connect in patchbay
+    // returns false if connection already made
+    bool patchConnect(unsigned int src, unsigned int dest);
+
+    // disconnect in patchbay
+    // returns false if connection doesn't exist
+    bool patchDisconnect(unsigned int src, unsigned int dest);
+
+    // disconnect all in patchbay
+    void patchDisconnectAll(unsigned int portSet);
+
     // play note
     void noteOn(int chan, int ins, int note, int vol=-1);
 
@@ -902,6 +928,9 @@ class DivEngine {
     // set metronome volume (1.0 = 100%)
     void setMetronomeVol(float vol);
 
+    // get buffer position
+    int getBufferPos();
+
     // halt now
     void halt();
 
@@ -1070,6 +1099,7 @@ class DivEngine {
       elapsedBars(0),
       elapsedBeats(0),
       curSubSongIndex(0),
+      bufferPos(0),
       divider(60),
       cycles(0),
       clockDrift(0),
@@ -1104,6 +1134,8 @@ class DivEngine {
       samp_bbOut(NULL),
       metroTick(NULL),
       metroTickLen(0),
+      metroBuf(NULL),
+      metroBufLen(0),
       metroFreq(0),
       metroPos(0),
       metroAmp(0.0f),
@@ -1112,7 +1144,6 @@ class DivEngine {
       curOrders(NULL),
       curPat(NULL),
       tempIns(NULL),
-      oscBuf{NULL,NULL},
       oscSize(1),
       oscReadPos(0),
       oscWritePos(0),
@@ -1131,6 +1162,7 @@ class DivEngine {
       memset(pitchTable,0,4096*sizeof(int));
       memset(sysDefs,0,256*sizeof(void*));
       memset(walked,0,8192);
+      memset(oscBuf,0,DIV_MAX_OUTPUTS*(sizeof(float*)));
 
       for (int i=0; i<256; i++) {
         sysFileMapFur[i]=DIV_SYSTEM_NULL;
diff --git a/src/engine/fileOps.cpp b/src/engine/fileOps.cpp
index d5180c80..ffe04cfd 100644
--- a/src/engine/fileOps.cpp
+++ b/src/engine/fileOps.cpp
@@ -939,13 +939,13 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
       ds.systemLen=2;
       ds.system[0]=DIV_SYSTEM_YM2612;
       ds.system[1]=DIV_SYSTEM_SMS;
-      ds.systemVol[1]=32;
+      ds.systemVol[1]=0.5f;
     }
     if (ds.system[0]==DIV_SYSTEM_GENESIS_EXT) {
       ds.systemLen=2;
       ds.system[0]=DIV_SYSTEM_YM2612_EXT;
       ds.system[1]=DIV_SYSTEM_SMS;
-      ds.systemVol[1]=32;
+      ds.systemVol[1]=0.5f;
     }
     if (ds.system[0]==DIV_SYSTEM_ARCADE) {
       ds.systemLen=2;
@@ -1830,14 +1830,18 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
 
     // system volume
     for (int i=0; i<DIV_MAX_CHIPS; i++) {
-      ds.systemVol[i]=reader.readC();
+      signed char oldSysVol=reader.readC();
+      ds.systemVol[i]=(float)oldSysVol/64.0f;
       if (ds.version<59 && ds.system[i]==DIV_SYSTEM_NES) {
         ds.systemVol[i]/=4;
       }
     }
 
     // system panning
-    for (int i=0; i<DIV_MAX_CHIPS; i++) ds.systemPan[i]=reader.readC();
+    for (int i=0; i<DIV_MAX_CHIPS; i++) {
+      signed char oldSysPan=reader.readC();
+      ds.systemPan[i]=(float)oldSysPan/127.0f;
+    }
 
     // system props
     for (int i=0; i<DIV_MAX_CHIPS; i++) {
@@ -1860,14 +1864,14 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
           ds.system[i]=DIV_SYSTEM_YM2612;
           if (i<31) {
             ds.system[i+1]=DIV_SYSTEM_SMS;
-            ds.systemVol[i+1]=(((ds.systemVol[i]&127)*3)>>3)|(ds.systemVol[i]&128);
+            ds.systemVol[i+1]=ds.systemVol[i]*0.375f;
           }
         }
         if (ds.system[i]==DIV_SYSTEM_GENESIS_EXT) {
           ds.system[i]=DIV_SYSTEM_YM2612_EXT;
           if (i<31) {
             ds.system[i+1]=DIV_SYSTEM_SMS;
-            ds.systemVol[i+1]=(((ds.systemVol[i]&127)*3)>>3)|(ds.systemVol[i]&128);
+            ds.systemVol[i+1]=ds.systemVol[i]*0.375f;
           }
         }
         if (ds.system[i]==DIV_SYSTEM_ARCADE) {
@@ -2200,6 +2204,23 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       ds.autoSystem=true;
     }
 
+    // system output config
+    if (ds.version>=135) {
+      for (int i=0; i<ds.systemLen; i++) {
+        ds.systemVol[i]=reader.readF();
+        ds.systemPan[i]=reader.readF();
+        ds.systemPanFR[i]=reader.readF();
+      }
+
+      // patchbay
+      unsigned int conns=reader.readI();
+      for (unsigned int i=0; i<conns; i++) {
+        ds.patchbay.push_back((unsigned int)reader.readI());
+      }
+    }
+
+    if (ds.version>=136) song.patchbayAuto=reader.readC();
+
     // read system flags
     if (ds.version>=119) {
       logD("reading chip flags...");
@@ -2543,6 +2564,16 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
       }
     }
 
+    // OPL3 pan compat
+    if (ds.version<134) {
+      for (int i=0; i<ds.systemLen; i++) {
+        if (ds.system[i]==DIV_SYSTEM_OPL3 ||
+            ds.system[i]==DIV_SYSTEM_OPL3_DRUMS) {
+          ds.systemFlags[i].set("compatPan",true);
+        }
+      }
+    }
+
     if (active) quitDispatch();
     BUSY_BEGIN_SOFT;
     saveLock.lock();
@@ -3147,7 +3178,7 @@ bool DivEngine::loadFC(unsigned char* file, size_t len) {
 
     ds.systemLen=1;
     ds.system[0]=DIV_SYSTEM_AMIGA;
-    ds.systemVol[0]=64;
+    ds.systemVol[0]=1.0f;
     ds.systemPan[0]=0;
     ds.systemFlags[0].set("clockSel",1); // PAL
     ds.systemFlags[0].set("stereoSep",80);
@@ -4298,11 +4329,11 @@ SafeWriter* DivEngine::saveFur(bool notPrimary) {
   }
 
   for (int i=0; i<DIV_MAX_CHIPS; i++) {
-    w->writeC(song.systemVol[i]);
+    w->writeC(song.systemVol[i]*64.0f);
   }
 
   for (int i=0; i<DIV_MAX_CHIPS; i++) {
-    w->writeC(song.systemPan[i]);
+    w->writeC(song.systemPan[i]*127.0f);
   }
 
   // chip flags (we'll seek here later)
@@ -4446,6 +4477,18 @@ SafeWriter* DivEngine::saveFur(bool notPrimary) {
   w->writeString(song.systemNameJ,false);
   w->writeString(song.categoryJ,false);
 
+  // system output config
+  for (int i=0; i<song.systemLen; i++) {
+    w->writeF(song.systemVol[i]);
+    w->writeF(song.systemPan[i]);
+    w->writeF(song.systemPanFR[i]);
+  }
+  w->writeI(song.patchbay.size());
+  for (unsigned int i: song.patchbay) {
+    w->writeI(i);
+  }
+  w->writeC(song.patchbayAuto);
+
   blockEndSeek=w->tell();
   w->seek(blockStartSeek,SEEK_SET);
   w->writeI(blockEndSeek-blockStartSeek-4);
diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index de31295e..ee355a6c 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -372,24 +372,15 @@ struct DivInstrumentC64 {
 };
 
 struct DivInstrumentAmiga {
-  enum DivReverseMode: unsigned char {
-    DIV_REVERSE_DISABLE=0,
-    DIV_REVERSE_ENABLE,
-    DIV_REVERSE_DEFAULT
-  };
-
   struct SampleMap {
     int freq;
     short map;
-    DivInstrumentAmiga::DivReverseMode reversed;
-    SampleMap(int f=0, short m=-1, DivInstrumentAmiga::DivReverseMode r=DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DEFAULT):
+    SampleMap(int f=0, short m=-1):
       freq(f),
-      map(m),
-      reversed(r) {}
+      map(m) {}
   };
 
   short initSample;
-  DivInstrumentAmiga::DivReverseMode reversed;
   bool useNoteMap;
   bool useSample;
   bool useWave;
@@ -427,22 +418,8 @@ struct DivInstrumentAmiga {
     return -1;
   }
 
-  /**
-   * get the sample reversed flag at specified note.
-   * @return the reversed flag.
-   */
-  inline DivInstrumentAmiga::DivReverseMode getReversed(int note) {
-    if (useNoteMap) {
-      if (note<0) note=0;
-      if (note>119) note=119;
-      return noteMap[note].reversed;
-    }
-    return reversed;
-  }
-
   DivInstrumentAmiga():
     initSample(0),
-    reversed(DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DISABLE),
     useNoteMap(false),
     useSample(false),
     useWave(false),
diff --git a/src/engine/platform/abstract.cpp b/src/engine/platform/abstract.cpp
index bd56efb8..21415725 100644
--- a/src/engine/platform/abstract.cpp
+++ b/src/engine/platform/abstract.cpp
@@ -19,7 +19,7 @@
 
 #include "../dispatch.h"
 
-void DivDispatch::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivDispatch::acquire(short** buf, size_t len) {
 }
 
 void DivDispatch::fillStream(std::vector<DivDelayedWrite>& stream, int sRate, size_t len) {
@@ -69,8 +69,8 @@ int DivDispatch::dispatch(DivCommand c) {
 void DivDispatch::reset() {
 }
 
-bool DivDispatch::isStereo() {
-  return false;
+int DivDispatch::getOutputCount() {
+  return 1;
 }
 
 bool DivDispatch::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/amiga.cpp b/src/engine/platform/amiga.cpp
index 0ecd6ba4..6f70a310 100644
--- a/src/engine/platform/amiga.cpp
+++ b/src/engine/platform/amiga.cpp
@@ -75,9 +75,9 @@ const char** DivPlatformAmiga::getRegisterSheet() {
     if (chan[i+1].freq<AMIGA_DIVIDER) chan[i+1].freq=AMIGA_DIVIDER; \
   }
 
-void DivPlatformAmiga::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformAmiga::acquire(short** buf, size_t len) {
   static int outL, outR, output;
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     outL=0;
     outR=0;
     for (int i=0; i<4; i++) {
@@ -142,8 +142,8 @@ void DivPlatformAmiga::acquire(short* bufL, short* bufR, size_t start, size_t le
     filter[0][1]+=(filtConst*(filter[0][0]-filter[0][1]))>>12;
     filter[1][0]+=(filtConst*(outR-filter[1][0]))>>12;
     filter[1][1]+=(filtConst*(filter[1][0]-filter[1][1]))>>12;
-    bufL[h]=filter[0][1];
-    bufR[h]=filter[1][1];
+    buf[0][h]=filter[0][1];
+    buf[1][h]=filter[1][1];
   }
 }
 
@@ -401,8 +401,8 @@ void DivPlatformAmiga::reset() {
   filtConst=filterOn?filtConstOn:filtConstOff;
 }
 
-bool DivPlatformAmiga::isStereo() {
-  return true;
+int DivPlatformAmiga::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformAmiga::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/amiga.h b/src/engine/platform/amiga.h
index f2870744..494b5da7 100644
--- a/src/engine/platform/amiga.h
+++ b/src/engine/platform/amiga.h
@@ -67,7 +67,7 @@ class DivPlatformAmiga: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
@@ -75,7 +75,7 @@ class DivPlatformAmiga: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     DivMacroInt* getChanMacroInt(int ch);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/arcade.cpp b/src/engine/platform/arcade.cpp
index e7324998..f9a2e7cb 100644
--- a/src/engine/platform/arcade.cpp
+++ b/src/engine/platform/arcade.cpp
@@ -50,10 +50,10 @@ const char** DivPlatformArcade::getRegisterSheet() {
   return regCheatSheetOPM;
 }
 
-void DivPlatformArcade::acquire_nuked(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformArcade::acquire_nuked(short** buf, size_t len) {
   static int o[2];
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     for (int i=0; i<8; i++) {
       if (!writes.empty() && !fm.write_busy) {
         QueuedWrite& w=writes.front();
@@ -84,17 +84,17 @@ void DivPlatformArcade::acquire_nuked(short* bufL, short* bufR, size_t start, si
     if (o[1]<-32768) o[1]=-32768;
     if (o[1]>32767) o[1]=32767;
 
-    bufL[h]=o[0];
-    bufR[h]=o[1];
+    buf[0][h]=o[0];
+    buf[1][h]=o[1];
   }
 }
 
-void DivPlatformArcade::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformArcade::acquire_ymfm(short** buf, size_t len) {
   static int os[2];
 
   ymfm::ym2151::fm_engine* fme=fm_ymfm->debug_engine();
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     if (!writes.empty()) {
       if (--delay<1) {
@@ -121,16 +121,16 @@ void DivPlatformArcade::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
 
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
   }
 }
 
-void DivPlatformArcade::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformArcade::acquire(short** buf, size_t len) {
   if (useYMFM) {
-    acquire_ymfm(bufL,bufR,start,len);
+    acquire_ymfm(buf,len);
   } else {
-    acquire_nuked(bufL,bufR,start,len);
+    acquire_nuked(buf,len);
   }
 }
 
@@ -885,8 +885,8 @@ void DivPlatformArcade::setFlags(const DivConfig& flags) {
   }
 }
 
-bool DivPlatformArcade::isStereo() {
-  return true;
+int DivPlatformArcade::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformArcade::setYMFM(bool use) {
diff --git a/src/engine/platform/arcade.h b/src/engine/platform/arcade.h
index f8c66aca..0bbd9b2c 100644
--- a/src/engine/platform/arcade.h
+++ b/src/engine/platform/arcade.h
@@ -58,13 +58,13 @@ class DivPlatformArcade: public DivPlatformOPM {
     int octave(int freq);
     int toFreq(int freq);
 
-    void acquire_nuked(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_nuked(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
 
     friend void putDispatchChan(void*,int,int);
     friend void putDispatchChip(void*,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
@@ -77,7 +77,7 @@ class DivPlatformArcade: public DivPlatformOPM {
     DivMacroInt* getChanMacroInt(int ch);
     void notifyInsChange(int ins);
     void setFlags(const DivConfig& flags);
-    bool isStereo();
+    int getOutputCount();
     void setYMFM(bool use);
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
diff --git a/src/engine/platform/ay.cpp b/src/engine/platform/ay.cpp
index bc3abc3c..4a2a4b59 100644
--- a/src/engine/platform/ay.cpp
+++ b/src/engine/platform/ay.cpp
@@ -169,7 +169,7 @@ void DivPlatformAY8910::checkWrites() {
   }
 }
 
-void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformAY8910::acquire(short** buf, size_t len) {
   if (ayBufLen<len) {
     ayBufLen=len;
     for (int i=0; i<3; i++) {
@@ -184,8 +184,8 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
       checkWrites();
 
       ay->sound_stream_update(ayBuf,1);
-      bufL[i+start]=ayBuf[0][0];
-      bufR[i+start]=bufL[i+start];
+      buf[0][i]=ayBuf[0][0];
+      buf[1][i]=buf[0][i];
 
       oscBuf[0]->data[oscBuf[0]->needle++]=sunsoftVolTable[31-(ay->lastIndx&31)]>>3;
       oscBuf[1]->data[oscBuf[1]->needle++]=sunsoftVolTable[31-((ay->lastIndx>>5)&31)]>>3;
@@ -198,11 +198,11 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
 
       ay->sound_stream_update(ayBuf,1);
       if (stereo) {
-        bufL[i+start]=ayBuf[0][0]+ayBuf[1][0]+((ayBuf[2][0]*stereoSep)>>8);
-        bufR[i+start]=((ayBuf[0][0]*stereoSep)>>8)+ayBuf[1][0]+ayBuf[2][0];
+        buf[0][i]=ayBuf[0][0]+ayBuf[1][0]+((ayBuf[2][0]*stereoSep)>>8);
+        buf[1][i]=((ayBuf[0][0]*stereoSep)>>8)+ayBuf[1][0]+ayBuf[2][0];
       } else {
-        bufL[i+start]=ayBuf[0][0]+ayBuf[1][0]+ayBuf[2][0];
-        bufR[i+start]=bufL[i+start];
+        buf[0][i]=ayBuf[0][0]+ayBuf[1][0]+ayBuf[2][0];
+        buf[1][i]=buf[0][i];
       }
 
       oscBuf[0]->data[oscBuf[0]->needle++]=ayBuf[0][0]<<2;
@@ -751,8 +751,8 @@ void DivPlatformAY8910::reset() {
   portBVal=0;
 }
 
-bool DivPlatformAY8910::isStereo() {
-  return true;
+int DivPlatformAY8910::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformAY8910::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/ay.h b/src/engine/platform/ay.h
index e8d7efce..ad8b4625 100644
--- a/src/engine/platform/ay.h
+++ b/src/engine/platform/ay.h
@@ -128,7 +128,7 @@ class DivPlatformAY8910: public DivDispatch {
   
   public:
     void setExtClockDiv(unsigned int eclk=COLOR_NTSC, unsigned char ediv=8);
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
@@ -140,7 +140,7 @@ class DivPlatformAY8910: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     void setFlags(const DivConfig& flags);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     DivMacroInt* getChanMacroInt(int ch);
     bool getDCOffRequired();
diff --git a/src/engine/platform/ay8930.cpp b/src/engine/platform/ay8930.cpp
index 5d8cbc13..85eca751 100644
--- a/src/engine/platform/ay8930.cpp
+++ b/src/engine/platform/ay8930.cpp
@@ -164,7 +164,7 @@ void DivPlatformAY8930::checkWrites() {
   }
 }
 
-void DivPlatformAY8930::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformAY8930::acquire(short** buf, size_t len) {
   if (ayBufLen<len) {
     ayBufLen=len;
     for (int i=0; i<3; i++) {
@@ -179,11 +179,11 @@ void DivPlatformAY8930::acquire(short* bufL, short* bufR, size_t start, size_t l
 
     ay->sound_stream_update(ayBuf,1);
     if (stereo) {
-      bufL[i+start]=ayBuf[0][0]+ayBuf[1][0]+((ayBuf[2][0]*stereoSep)>>8);
-      bufR[i+start]=((ayBuf[0][0]*stereoSep)>>8)+ayBuf[1][0]+ayBuf[2][0];
+      buf[0][i]=ayBuf[0][0]+ayBuf[1][0]+((ayBuf[2][0]*stereoSep)>>8);
+      buf[1][i]=((ayBuf[0][0]*stereoSep)>>8)+ayBuf[1][0]+ayBuf[2][0];
     } else {
-      bufL[i+start]=ayBuf[0][0]+ayBuf[1][0]+ayBuf[2][0];
-      bufR[i+start]=bufL[i+start];
+      buf[0][i]=ayBuf[0][0]+ayBuf[1][0]+ayBuf[2][0];
+      buf[1][i]=buf[0][i];
     }
 
     oscBuf[0]->data[oscBuf[0]->needle++]=ayBuf[0][0]<<2;
@@ -747,8 +747,8 @@ void DivPlatformAY8930::reset() {
   immWrite(0x1a,0x00); // or mask
 }
 
-bool DivPlatformAY8930::isStereo() {
-  return true;
+int DivPlatformAY8930::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformAY8930::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/ay8930.h b/src/engine/platform/ay8930.h
index 0bd2171a..0e60c350 100644
--- a/src/engine/platform/ay8930.h
+++ b/src/engine/platform/ay8930.h
@@ -131,7 +131,7 @@ class DivPlatformAY8930: public DivDispatch {
     friend void putDispatchChan(void*,int,int);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
@@ -142,7 +142,7 @@ class DivPlatformAY8930: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     void setFlags(const DivConfig& flags);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     DivMacroInt* getChanMacroInt(int ch);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/bubsyswsg.cpp b/src/engine/platform/bubsyswsg.cpp
index 2d3f6ed0..31869722 100644
--- a/src/engine/platform/bubsyswsg.cpp
+++ b/src/engine/platform/bubsyswsg.cpp
@@ -39,9 +39,9 @@ const char** DivPlatformBubSysWSG::getRegisterSheet() {
   return regCheatSheetBubSysWSG;
 }
 
-void DivPlatformBubSysWSG::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformBubSysWSG::acquire(short** buf, size_t len) {
   int chanOut=0;
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     signed int out=0;
     // K005289 part
     k005289.tick();
@@ -68,7 +68,7 @@ void DivPlatformBubSysWSG::acquire(short* bufL, short* bufR, size_t start, size_
     if (out>32767) out=32767;
 
     //printf("out: %d\n",out);
-    bufL[h]=bufR[h]=out;
+    buf[0][h]=buf[1][h]=out;
   }
 }
 
@@ -306,8 +306,8 @@ void DivPlatformBubSysWSG::reset() {
   k005289.reset();
 }
 
-bool DivPlatformBubSysWSG::isStereo() {
-  return false;
+int DivPlatformBubSysWSG::getOutputCount() {
+  return 1;
 }
 
 bool DivPlatformBubSysWSG::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/bubsyswsg.h b/src/engine/platform/bubsyswsg.h
index 92c64d89..d544c2ec 100644
--- a/src/engine/platform/bubsyswsg.h
+++ b/src/engine/platform/bubsyswsg.h
@@ -45,7 +45,7 @@ class DivPlatformBubSysWSG: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
@@ -56,7 +56,7 @@ class DivPlatformBubSysWSG: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     DivMacroInt* getChanMacroInt(int ch);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/c64.cpp b/src/engine/platform/c64.cpp
index 8091e179..4d1caf9a 100644
--- a/src/engine/platform/c64.cpp
+++ b/src/engine/platform/c64.cpp
@@ -63,9 +63,9 @@ const char** DivPlatformC64::getRegisterSheet() {
   return regCheatSheetSID;
 }
 
-void DivPlatformC64::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformC64::acquire(short** buf, size_t len) {
   int dcOff=isFP?0:sid.get_dc(0);
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     if (!writes.empty()) {
       QueuedWrite w=writes.front();
       if (isFP) {
@@ -77,7 +77,7 @@ void DivPlatformC64::acquire(short* bufL, short* bufR, size_t start, size_t len)
       writes.pop();
     }
     if (isFP) {
-      sid_fp.clock(4,&bufL[i]);
+      sid_fp.clock(4,&buf[0][i]);
       if (++writeOscBuf>=4) {
         writeOscBuf=0;
         oscBuf[0]->data[oscBuf[0]->needle++]=(sid_fp.lastChanOut[0]-dcOff)>>5;
@@ -86,7 +86,7 @@ void DivPlatformC64::acquire(short* bufL, short* bufR, size_t start, size_t len)
       }
     } else {
       sid.clock();
-      bufL[i]=sid.output();
+      buf[0][i]=sid.output();
       if (++writeOscBuf>=16) {
         writeOscBuf=0;
         oscBuf[0]->data[oscBuf[0]->needle++]=(sid.last_chan_out[0]-dcOff)>>5;
diff --git a/src/engine/platform/c64.h b/src/engine/platform/c64.h
index 9bdabbe4..28cf5b29 100644
--- a/src/engine/platform/c64.h
+++ b/src/engine/platform/c64.h
@@ -79,7 +79,7 @@ class DivPlatformC64: public DivDispatch {
 
   void updateFilter();
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
diff --git a/src/engine/platform/dummy.cpp b/src/engine/platform/dummy.cpp
index 898809cc..28cb5d40 100644
--- a/src/engine/platform/dummy.cpp
+++ b/src/engine/platform/dummy.cpp
@@ -24,9 +24,9 @@
 
 #define CHIP_FREQBASE 2048
 
-void DivPlatformDummy::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformDummy::acquire(short** buf, size_t len) {
   int chanOut;
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     int out=0;
     for (unsigned char j=0; j<chans; j++) {
       if (chan[j].active) {
@@ -44,7 +44,7 @@ void DivPlatformDummy::acquire(short* bufL, short* bufR, size_t start, size_t le
     }
     if (out<-32768) out=-32768;
     if (out>32767) out=32767;
-    bufL[i]=out;
+    buf[0][i]=out;
   }
 }
 
diff --git a/src/engine/platform/dummy.h b/src/engine/platform/dummy.h
index d3a1b91e..c12d494b 100644
--- a/src/engine/platform/dummy.h
+++ b/src/engine/platform/dummy.h
@@ -37,7 +37,7 @@ class DivPlatformDummy: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     void muteChannel(int ch, bool mute);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
diff --git a/src/engine/platform/es5506.cpp b/src/engine/platform/es5506.cpp
index 1023b56b..d3005a26 100644
--- a/src/engine/platform/es5506.cpp
+++ b/src/engine/platform/es5506.cpp
@@ -112,8 +112,8 @@ const char** DivPlatformES5506::getRegisterSheet() {
   return regCheatSheetES5506;
 }
 
-void DivPlatformES5506::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformES5506::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     // convert 32 bit access to 8 bit host interface
     while (!hostIntf32.empty()) {
       QueuedHostIntf w=hostIntf32.front();
@@ -132,8 +132,10 @@ void DivPlatformES5506::acquire(short* bufL, short* bufR, size_t start, size_t l
     }
     prevChanCycle=es5506.voice_cycle();
     es5506.tick_perf();
-    bufL[h]=es5506.lout(0);
-    bufR[h]=es5506.rout(0);
+    for (int o=0; o<6; o++) {
+      buf[(o<<1)|0][h]=es5506.lout(o);
+      buf[(o<<1)|1][h]=es5506.rout(o);
+    }
     for (int i=0; i<32; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=(short)(chan[i].oscOut&0xffff);
     }
@@ -212,7 +214,7 @@ void DivPlatformES5506::e_pin(bool state) {
   if (!queuedRead.empty()) {
     unsigned char ch=queuedRead.front()&0x1f;
     if (chan[ch].isReverseLoop) { // Reversed loop
-      pageWriteMask(0x00|ch,0x5f,0x00,(chan[ch].pcm.reversed?0x0000:0x0040)|0x08,0x78);
+      pageWriteMask(0x00|ch,0x5f,0x00,(0x0040)|0x08,0x78);
       chan[ch].isReverseLoop=false;
     }
     queuedRead.pop();
@@ -236,7 +238,8 @@ void DivPlatformES5506::tick(bool sysTick) {
       if (chan[i].outVol!=nextVol) {
         chan[i].outVol=nextVol;
         if (!isMuted[i]) {
-          chan[i].volChanged.changed=0xff;
+          chan[i].volChanged.lVol=1;
+          chan[i].volChanged.rVol=1;
         }
       }
     }
@@ -401,6 +404,16 @@ void DivPlatformES5506::tick(bool sysTick) {
         }
       }
     }
+    // channel assignment
+    if (chan[i].active && chan[i].std.fb.had) {
+      const unsigned char ca=CLAMP(chan[i].std.fb.val,0,5);
+      if (chan[i].ca!=ca) {
+        chan[i].ca=ca;
+        if (!chan[i].keyOn) {
+          chan[i].volChanged.ca=1;
+        }
+      }
+    }
     // control macros
     if (chan[i].active && chan[i].std.alg.had) {
       if (chan[i].pcm.pause!=(bool)(chan[i].std.alg.val&1)) {
@@ -412,7 +425,7 @@ void DivPlatformES5506::tick(bool sysTick) {
       if (chan[i].pcm.direction!=(bool)(chan[i].std.alg.val&2)) {
         chan[i].pcm.direction=chan[i].std.alg.val&2;
         if (!chan[i].keyOn) {
-          pageWriteMask(0x00|i,0x5f,0x00,chan[i].pcm.isReversed()?0x0040:0x0000,0x0040);
+          pageWriteMask(0x00|i,0x5f,0x00,chan[i].pcm.direction?0x0040:0x0000,0x0040);
         }
       }
     }
@@ -451,6 +464,9 @@ void DivPlatformES5506::tick(bool sysTick) {
             pageWrite(0x00|i,0x04,chan[i].resRVol);
           }
         }
+        if (chan[i].volChanged.ca) {
+          pageWriteMask(0x00|i,0x5f,0x00,(chan[i].ca<<10),0x1c00);
+        }
       } else { // mute
         pageWrite(0x00|i,0x02,0);
         pageWrite(0x00|i,0x04,0);
@@ -488,25 +504,18 @@ void DivPlatformES5506::tick(bool sysTick) {
             }
             // get loop mode
             DivSampleLoopMode loopMode=s->isLoopable()?s->loopMode:DIV_SAMPLE_LOOP_MAX;
-            // get reversed
-            bool reversed=ins->amiga.reversed;
-            if (ins->amiga.useNoteMap&&noteMapind.reversed!=DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DEFAULT) {
-              reversed=noteMapind.reversed;
-            }
             const unsigned int start=offES5506<<10;
             const unsigned int length=s->samples-1;
             const unsigned int end=start+(length<<11);
             const unsigned int nextBank=(offES5506>>22)&3;
             const double nextFreqOffs=PITCH_OFFSET*off;
             chan[i].pcm.loopMode=loopMode;
-            chan[i].pcm.reversed=reversed;
             chan[i].pcm.bank=nextBank;
             chan[i].pcm.start=start;
             chan[i].pcm.end=end;
             chan[i].pcm.length=length;
-            if ((chan[i].pcm.loopMode!=loopMode) || (chan[i].pcm.reversed!=reversed) || (chan[i].pcm.bank!=nextBank)) {
+            if ((chan[i].pcm.loopMode!=loopMode) || (chan[i].pcm.bank!=nextBank)) {
               chan[i].pcm.loopMode=loopMode;
-              chan[i].pcm.reversed=reversed;
               chan[i].pcm.bank=nextBank;
               chan[i].pcmChanged.loopBank=1;
             }
@@ -518,7 +527,7 @@ void DivPlatformES5506::tick(bool sysTick) {
         }
         if (sampleVaild) {
           if (!chan[i].keyOn) {
-            pageWrite(0x20|i,0x03,(chan[i].pcm.isReversed())?chan[i].pcm.end:chan[i].pcm.start);
+            pageWrite(0x20|i,0x03,(chan[i].pcm.direction)?chan[i].pcm.end:chan[i].pcm.start);
           }
           chan[i].pcmChanged.slice=1;
         }
@@ -552,7 +561,7 @@ void DivPlatformES5506::tick(bool sysTick) {
       }
       if (chan[i].pcmChanged.loopBank) {
         if (!chan[i].keyOn) {
-          unsigned int loopFlag=(chan[i].pcm.bank<<14)|(chan[i].pcm.isReversed()?0x0040:0x0000);
+          unsigned int loopFlag=(chan[i].pcm.bank<<14)|(chan[i].pcm.direction?0x0040:0x0000);
           chan[i].isReverseLoop=false;
           switch (chan[i].pcm.loopMode) {
             case DIV_SAMPLE_LOOP_FORWARD: // Forward loop
@@ -570,7 +579,7 @@ void DivPlatformES5506::tick(bool sysTick) {
               break;
           }
           // Set loop mode & Bank
-          pageWriteMask(0x00|i,0x5f,0x00,loopFlag,0xfcfd);
+          pageWriteMask(0x00|i,0x5f,0x00,loopFlag,0xe0fd);
         }
         chan[i].pcmChanged.loopBank=0;
       }
@@ -649,11 +658,11 @@ void DivPlatformES5506::tick(bool sysTick) {
       chan[i].freq=CLAMP(parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,2,chan[i].pitch2,chipClock,chan[i].pcm.freqOffs),0,0x1ffff);
       if (chan[i].keyOn) {
         if (chan[i].pcm.index>=0 && chan[i].pcm.index<parent->song.sampleLen) {
-          unsigned int startPos=chan[i].pcm.isReversed()?chan[i].pcm.end:chan[i].pcm.start;
+          unsigned int startPos=chan[i].pcm.direction?chan[i].pcm.end:chan[i].pcm.start;
           if (chan[i].pcm.nextPos) {
             const unsigned int start=chan[i].pcm.start;
             const unsigned int end=chan[i].pcm.length;
-            startPos=start+((chan[i].pcm.isReversed()?(end-chan[i].pcm.nextPos):(chan[i].pcm.nextPos))<<11);
+            startPos=start+((chan[i].pcm.direction?(end-chan[i].pcm.nextPos):(chan[i].pcm.nextPos))<<11);
             chan[i].pcm.nextPos=0;
           }
           chan[i].k1Prev=0xffff;
@@ -721,7 +730,7 @@ void DivPlatformES5506::tick(bool sysTick) {
           chan[i].k1Prev=k1;
           pageWrite(0x00|i,0x02,chan[i].resLVol);
           pageWrite(0x00|i,0x04,chan[i].resRVol);
-          unsigned int loopFlag=chan[i].pcm.isReversed()?0x0040:0x0000;
+          unsigned int loopFlag=(chan[i].ca<<10)|(chan[i].pcm.direction?0x0040:0x0000);
           chan[i].isReverseLoop=false;
           switch (chan[i].pcm.loopMode) {
             case DIV_SAMPLE_LOOP_FORWARD: // Forward loop
@@ -851,6 +860,10 @@ int DivPlatformES5506::dispatch(DivCommand c) {
       return chan[c.chan].outVol;
       break;
     case DIV_CMD_PANNING: {
+      if (chan[c.chan].ca!=0) {
+        chan[c.chan].ca=0;
+        chan[c.chan].volChanged.ca=1;
+      }
       // Left volume
       if (chan[c.chan].lVol!=(unsigned int)(c.value)) {
         chan[c.chan].lVol=c.value;
@@ -873,6 +886,38 @@ int DivPlatformES5506::dispatch(DivCommand c) {
       }
       break;
     }
+    case DIV_CMD_SURROUND_PANNING: {
+      unsigned char ca=CLAMP(c.value>>1,0,5);
+      if (chan[c.chan].ca!=ca) {
+        chan[c.chan].ca=ca;
+        chan[c.chan].volChanged.ca=1;
+      }
+      if ((c.value&1)==0) {
+        // Left volume
+        if (chan[c.chan].lVol!=(unsigned int)(c.value2)) {
+          chan[c.chan].lVol=c.value2;
+          if (!chan[c.chan].std.panL.has) {
+            chan[c.chan].outLVol=(0xffff*c.value2)/0xff;
+            if (!isMuted[c.chan]) {
+              chan[c.chan].volChanged.lVol=1;
+            }
+          }
+        }
+      }
+      else if ((c.value&1)==1) {
+        // Right volume
+        if (chan[c.chan].rVol!=(unsigned int)(c.value2)) {
+          chan[c.chan].rVol=c.value2;
+          if (!chan[c.chan].std.panR.has) {
+            chan[c.chan].outRVol=(0xffff*c.value2)/0xff;
+            if (!isMuted[c.chan]) {
+              chan[c.chan].volChanged.rVol=1;
+            }
+          }
+        }
+      }
+      break;
+    }
     case DIV_CMD_PITCH:
       chan[c.chan].pitch=c.value;
       chan[c.chan].freqChanged=true;
@@ -1048,8 +1093,8 @@ int DivPlatformES5506::dispatch(DivCommand c) {
       if (chan[c.chan].active) {
         const unsigned int start=chan[c.chan].pcm.start;
         const unsigned int end=chan[c.chan].pcm.length;
-        const unsigned int pos=chan[c.chan].pcm.isReversed()?(end-c.value):c.value;
-        if ((chan[c.chan].pcm.isReversed() && pos>0) || ((!chan[c.chan].pcm.isReversed()) && pos<end)) {
+        const unsigned int pos=chan[c.chan].pcm.direction?(end-c.value):c.value;
+        if ((chan[c.chan].pcm.direction && pos>0) || ((!chan[c.chan].pcm.direction) && pos<end)) {
           pageWrite(0x20|c.chan,0x03,start+(pos<<11));
         }
         break;
@@ -1063,7 +1108,7 @@ int DivPlatformES5506::dispatch(DivCommand c) {
     case DIV_CMD_SAMPLE_DIR: {
       if (chan[c.chan].pcm.direction!=(bool)(c.value&1)) {
         chan[c.chan].pcm.direction=c.value&1;
-        pageWriteMask(0x00|c.chan,0x5f,0x00,chan[c.chan].pcm.isReversed()?0x0040:0x0000,0x0040);
+        pageWriteMask(0x00|c.chan,0x5f,0x00,chan[c.chan].pcm.direction?0x0040:0x0000,0x0040);
       }
       break;
     }
@@ -1143,8 +1188,8 @@ void DivPlatformES5506::reset() {
   pageWriteMask(0x00,0x60,0x0c,0x08); // Reset serial output
 }
 
-bool DivPlatformES5506::isStereo() {
-  return true;
+int DivPlatformES5506::getOutputCount() {
+  return 12;
 }
 
 bool DivPlatformES5506::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/es5506.h b/src/engine/platform/es5506.h
index 0cb0cb46..dd1ef017 100644
--- a/src/engine/platform/es5506.h
+++ b/src/engine/platform/es5506.h
@@ -32,13 +32,12 @@
 class DivPlatformES5506: public DivDispatch, public es550x_intf {
   struct Channel : public SharedChannel<unsigned int> {
     struct PCM {
-      bool isReversed() { return reversed^direction; }
       bool isNoteMap;
       int index, next;
       int note;
       double freqOffs;
       double nextFreqOffs;
-      bool reversed, pause, direction;
+      bool pause, direction;
       unsigned int bank;
       unsigned int start;
       unsigned int end;
@@ -54,7 +53,6 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
         note(0),
         freqOffs(1.0),
         nextFreqOffs(1.0),
-        reversed(false),
         pause(false),
         direction(false),
         bank(0),
@@ -91,7 +89,8 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
         struct { // flag bits
           unsigned char lVol: 1; // left volume
           unsigned char rVol: 1; // right volume
-          unsigned char dummy: 6; // dummy for bit padding
+          unsigned char ca: 1; // Channel assignment
+          unsigned char dummy: 5; // dummy for bit padding
         };
         unsigned char changed; // Packed flags are stored here
       };
@@ -176,6 +175,7 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
         state(State()) {}
     } overwrite;
 
+    unsigned char ca;
     signed int k1Offs, k2Offs;
     signed int k1Slide, k2Slide;
     signed int k1Prev, k2Prev;
@@ -214,6 +214,7 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
       envChanged(EnvChanged()),
       pcmChanged(PCMChanged()),
       overwrite(Overwrite()),
+      ca(0),
       k1Offs(0),
       k2Offs(0),
       k1Slide(0),
@@ -303,7 +304,7 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
       return sampleMem[((bank&3)<<21)|(address&0x1fffff)];
     }
 
-    virtual void acquire(short* bufL, short* bufR, size_t start, size_t len) override;
+    virtual void acquire(short** buf, size_t len) override;
     virtual int dispatch(DivCommand c) override;
     virtual void* getChanState(int chan) override;
     virtual DivMacroInt* getChanMacroInt(int ch) override;
@@ -314,7 +315,7 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
     virtual void forceIns() override;
     virtual void tick(bool sysTick=true) override;
     virtual void muteChannel(int ch, bool mute) override;
-    virtual bool isStereo() override;
+    virtual int getOutputCount() override;
     virtual bool keyOffAffectsArp(int ch) override;
     virtual void setFlags(const DivConfig& flags) override;
     virtual void notifyInsChange(int ins) override;
diff --git a/src/engine/platform/fds.cpp b/src/engine/platform/fds.cpp
index e0047ace..cdddbaca 100644
--- a/src/engine/platform/fds.cpp
+++ b/src/engine/platform/fds.cpp
@@ -55,13 +55,13 @@ const char** DivPlatformFDS::getRegisterSheet() {
   return regCheatSheetFDS;
 }
 
-void DivPlatformFDS::acquire_puNES(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformFDS::acquire_puNES(short* buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     extcl_apu_tick_FDS(fds);
     int sample=isMuted[0]?0:fds->snd.main.output;
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    bufL[i]=sample;
+    buf[i]=sample;
     if (++writeOscBuf>=32) {
       writeOscBuf=0;
       oscBuf->data[oscBuf->needle++]=sample<<1;
@@ -69,15 +69,15 @@ void DivPlatformFDS::acquire_puNES(short* bufL, short* bufR, size_t start, size_
   }
 }
 
-void DivPlatformFDS::acquire_NSFPlay(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformFDS::acquire_NSFPlay(short* buf, size_t len) {
   int out[2];
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     fds_NP->Tick(1);
     fds_NP->Render(out);
     int sample=isMuted[0]?0:(out[0]<<1);
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    bufL[i]=sample;
+    buf[i]=sample;
     if (++writeOscBuf>=32) {
       writeOscBuf=0;
       oscBuf->data[oscBuf->needle++]=sample<<1;
@@ -93,11 +93,11 @@ void DivPlatformFDS::doWrite(unsigned short addr, unsigned char data) {
   }
 }
 
-void DivPlatformFDS::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformFDS::acquire(short** buf, size_t len) {
   if (useNP) {
-    acquire_NSFPlay(bufL,bufR,start,len);
+    acquire_NSFPlay(buf[0],len);
   } else {
-    acquire_puNES(bufL,bufR,start,len);
+    acquire_puNES(buf[0],len);
   }
 }
 
diff --git a/src/engine/platform/fds.h b/src/engine/platform/fds.h
index beabb641..7872319b 100644
--- a/src/engine/platform/fds.h
+++ b/src/engine/platform/fds.h
@@ -62,11 +62,11 @@ class DivPlatformFDS: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   void doWrite(unsigned short addr, unsigned char data);
-  void acquire_puNES(short* bufL, short* bufR, size_t start, size_t len);
-  void acquire_NSFPlay(short* bufL, short* bufR, size_t start, size_t len);
+  void acquire_puNES(short* buf, size_t len);
+  void acquire_NSFPlay(short* buf, size_t len);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/ga20.cpp b/src/engine/platform/ga20.cpp
index bd3c79df..c5cbbb61 100644
--- a/src/engine/platform/ga20.cpp
+++ b/src/engine/platform/ga20.cpp
@@ -51,7 +51,7 @@ inline void DivPlatformGA20::chWrite(unsigned char ch, unsigned int addr, unsign
   }
 }
 
-void DivPlatformGA20::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformGA20::acquire(short** buf, size_t len) {
   if (ga20BufLen<len) {
     ga20BufLen=len;
     for (int i=0; i<4; i++) {
@@ -60,7 +60,7 @@ void DivPlatformGA20::acquire(short* bufL, short* bufR, size_t start, size_t len
     }
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if ((--delay)<=0) {
       delay=MAX(0,delay);
       if (!writes.empty()) {
@@ -73,7 +73,7 @@ void DivPlatformGA20::acquire(short* bufL, short* bufR, size_t start, size_t len
     }
     short *buffer[4] = {&ga20Buf[0][h],&ga20Buf[1][h],&ga20Buf[2][h],&ga20Buf[3][h]};
     ga20.sound_stream_update(buffer, 1);
-    bufL[h]=(signed int)(ga20Buf[0][h]+ga20Buf[1][h]+ga20Buf[2][h]+ga20Buf[3][h])>>2;
+    buf[0][h]=(signed int)(ga20Buf[0][h]+ga20Buf[1][h]+ga20Buf[2][h]+ga20Buf[3][h])>>2;
     for (int i=0; i<4; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=ga20Buf[i][h];
     }
@@ -361,8 +361,8 @@ void DivPlatformGA20::reset() {
   }
 }
 
-bool DivPlatformGA20::isStereo() {
-  return false;
+int DivPlatformGA20::getOutputCount() {
+  return 1;
 }
 
 void DivPlatformGA20::notifyInsChange(int ins) {
diff --git a/src/engine/platform/ga20.h b/src/engine/platform/ga20.h
index 88b47547..9c67a9fd 100644
--- a/src/engine/platform/ga20.h
+++ b/src/engine/platform/ga20.h
@@ -74,7 +74,7 @@ class DivPlatformGA20: public DivDispatch, public iremga20_intf {
   void chWrite(unsigned char ch, unsigned int addr, unsigned char val);
   public:
     virtual u8 read_byte(u32 address) override;
-    virtual void acquire(short* bufL, short* bufR, size_t start, size_t len) override;
+    virtual void acquire(short** buf, size_t len) override;
     virtual int dispatch(DivCommand c) override;
     virtual void* getChanState(int chan) override;
     virtual DivMacroInt* getChanMacroInt(int ch) override;
@@ -85,7 +85,7 @@ class DivPlatformGA20: public DivDispatch, public iremga20_intf {
     virtual void forceIns() override;
     virtual void tick(bool sysTick=true) override;
     virtual void muteChannel(int ch, bool mute) override;
-    virtual bool isStereo() override;
+    virtual int getOutputCount() override;
     virtual void notifyInsChange(int ins) override;
     virtual void notifyWaveChange(int wave) override;
     virtual void notifyInsDeletion(void* ins) override;
diff --git a/src/engine/platform/gb.cpp b/src/engine/platform/gb.cpp
index e84d212b..bdee28a4 100644
--- a/src/engine/platform/gb.cpp
+++ b/src/engine/platform/gb.cpp
@@ -61,8 +61,8 @@ const char** DivPlatformGB::getRegisterSheet() {
   return regCheatSheetGB;
 }
 
-void DivPlatformGB::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformGB::acquire(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     if (!writes.empty()) {
       QueuedWrite& w=writes.front();
       GB_apu_write(gb,w.addr,w.val);
@@ -70,8 +70,8 @@ void DivPlatformGB::acquire(short* bufL, short* bufR, size_t start, size_t len)
     }
 
     GB_advance_cycles(gb,16);
-    bufL[i]=gb->apu_output.final_sample.left;
-    bufR[i]=gb->apu_output.final_sample.right;
+    buf[0][i]=gb->apu_output.final_sample.left;
+    buf[1][i]=gb->apu_output.final_sample.right;
 
     for (int i=0; i<4; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=(gb->apu_output.current_sample[i].left+gb->apu_output.current_sample[i].right)<<6;
@@ -604,8 +604,8 @@ int DivPlatformGB::getPortaFloor(int ch) {
   return 24;
 }
 
-bool DivPlatformGB::isStereo() {
-  return true;
+int DivPlatformGB::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformGB::getDCOffRequired() {
diff --git a/src/engine/platform/gb.h b/src/engine/platform/gb.h
index 58196299..8f70fecb 100644
--- a/src/engine/platform/gb.h
+++ b/src/engine/platform/gb.h
@@ -78,7 +78,7 @@ class DivPlatformGB: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -90,7 +90,7 @@ class DivPlatformGB: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getPortaFloor(int ch);
-    bool isStereo();
+    int getOutputCount();
     bool getDCOffRequired();
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index 62151b5e..644de1cc 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -56,9 +56,9 @@ void DivPlatformGenesis::processDAC(int iRate) {
           DivSample* s=parent->getSample(chan[i].dacSample);
           if (!isMuted[i] && s->samples>0) {
             if (parent->song.noOPN2Vol) {
-              chan[i].dacOutput=s->data8[chan[i].getDacDirection()?(s->samples-chan[i].dacPos-1):chan[i].dacPos];
+              chan[i].dacOutput=s->data8[chan[i].dacDirection?(s->samples-chan[i].dacPos-1):chan[i].dacPos];
             } else {
-              chan[i].dacOutput=(s->data8[chan[i].getDacDirection()?(s->samples-chan[i].dacPos-1):chan[i].dacPos]*dacVolTable[chan[i].outVol])>>7;
+              chan[i].dacOutput=(s->data8[chan[i].dacDirection?(s->samples-chan[i].dacPos-1):chan[i].dacPos]*dacVolTable[chan[i].outVol])>>7;
             }
             sample+=chan[i].dacOutput;
           } else {
@@ -106,9 +106,9 @@ void DivPlatformGenesis::processDAC(int iRate) {
             if (chan[5].dacReady && writes.size()<16) {
               int sample;
               if (parent->song.noOPN2Vol) {
-                sample=s->data8[chan[5].getDacDirection()?(s->samples-chan[5].dacPos-1):chan[5].dacPos];
+                sample=s->data8[chan[5].dacDirection?(s->samples-chan[5].dacPos-1):chan[5].dacPos];
               } else {
-                sample=(s->data8[chan[5].getDacDirection()?(s->samples-chan[5].dacPos-1):chan[5].dacPos]*dacVolTable[chan[5].outVol])>>7;
+                sample=(s->data8[chan[5].dacDirection?(s->samples-chan[5].dacPos-1):chan[5].dacPos]*dacVolTable[chan[5].outVol])>>7;
               }
               urgentWrite(0x2a,(unsigned char)sample+0x80);
               chan[5].dacReady=false;
@@ -132,11 +132,11 @@ void DivPlatformGenesis::processDAC(int iRate) {
   }
 }
 
-void DivPlatformGenesis::acquire_nuked(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformGenesis::acquire_nuked(short** buf, size_t len) {
   static short o[2];
   static int os[2];
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     processDAC(rate);
 
     os[0]=0; os[1]=0;
@@ -186,17 +186,17 @@ void DivPlatformGenesis::acquire_nuked(short* bufL, short* bufR, size_t start, s
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
   }
 }
 
-void DivPlatformGenesis::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformGenesis::acquire_ymfm(short** buf, size_t len) {
   static int os[2];
 
   ymfm::ym2612::fm_engine* fme=fm_ymfm->debug_engine();
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     processDAC(rate);
   
     os[0]=0; os[1]=0;
@@ -242,16 +242,16 @@ void DivPlatformGenesis::acquire_ymfm(short* bufL, short* bufR, size_t start, si
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
   }
 }
 
-void DivPlatformGenesis::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformGenesis::acquire(short** buf, size_t len) {
   if (useYMFM) {
-    acquire_ymfm(bufL,bufR,start,len);
+    acquire_ymfm(buf,len);
   } else {
-    acquire_nuked(bufL,bufR,start,len);
+    acquire_nuked(buf,len);
   }
 }
 
@@ -594,11 +594,10 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
             if (dumpWrites) addWrite(0xffff0002,0);
             break;
           } else {
-            chan[c.chan].dacReversed=ins->amiga.getReversed(c.value);
             rWrite(0x2b,1<<7);
             if (dumpWrites) {
               addWrite(0xffff0000,chan[c.chan].dacSample);
-              addWrite(0xffff0003,chan[c.chan].getDacDirection());
+              addWrite(0xffff0003,chan[c.chan].dacDirection);
             }
           }
           chan[c.chan].dacPos=0;
@@ -637,7 +636,6 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
           chan[c.chan].dacRate=MAX(1,parent->getSample(chan[c.chan].dacSample)->rate);
           if (dumpWrites) addWrite(0xffff0001,parent->getSample(chan[c.chan].dacSample)->rate);
           chan[c.chan].furnaceDac=false;
-          chan[c.chan].dacReversed=false;
         }
         break;
       }
@@ -859,7 +857,7 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
     case DIV_CMD_SAMPLE_DIR: {
       if (c.chan<5) c.chan=5;
       chan[c.chan].dacDirection=c.value;
-      if (dumpWrites) addWrite(0xffff0003,chan[c.chan].getDacDirection());
+      if (dumpWrites) addWrite(0xffff0003,chan[c.chan].dacDirection);
       break;
     }
     case DIV_CMD_LEGATO: {
@@ -1198,8 +1196,8 @@ void DivPlatformGenesis::reset() {
   delay=0;
 }
 
-bool DivPlatformGenesis::isStereo() {
-  return true;
+int DivPlatformGenesis::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformGenesis::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/genesis.h b/src/engine/platform/genesis.h
index 9b72649d..f57c33a3 100644
--- a/src/engine/platform/genesis.h
+++ b/src/engine/platform/genesis.h
@@ -56,12 +56,8 @@ class DivPlatformGenesis: public DivPlatformOPN {
       int dacDelay;
       bool dacReady;
       bool dacDirection;
-      bool dacReversed;
       unsigned char sampleBank;
       signed char dacOutput;
-      bool getDacDirection() {
-        return dacReversed^dacDirection;
-      }
       Channel():
         FMChannelStereo(),
         furnaceDac(false),
@@ -73,7 +69,6 @@ class DivPlatformGenesis: public DivPlatformOPN {
         dacDelay(0),
         dacReady(true),
         dacDirection(false),
-        dacReversed(false),
         sampleBank(0),
         dacOutput(0) {}
     };
@@ -97,13 +92,13 @@ class DivPlatformGenesis: public DivPlatformOPN {
     friend void putDispatchChan(void*,int,int);
 
     inline void processDAC(int iRate);
-    void acquire_nuked(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_nuked(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
   
     friend void putDispatchChip(void*,int);
     friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     void fillStream(std::vector<DivDelayedWrite>& stream, int sRate, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
@@ -115,7 +110,7 @@ class DivPlatformGenesis: public DivPlatformOPN {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     void setYMFM(bool use);
     bool keyOffAffectsArp(int ch);
     bool keyOffAffectsPorta(int ch);
diff --git a/src/engine/platform/k007232.cpp b/src/engine/platform/k007232.cpp
index 58304553..6a333c6c 100644
--- a/src/engine/platform/k007232.cpp
+++ b/src/engine/platform/k007232.cpp
@@ -54,8 +54,8 @@ inline void DivPlatformK007232::chWrite(unsigned char ch, unsigned int addr, uns
   }
 }
 
-void DivPlatformK007232::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformK007232::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     if ((--delay)<=0) {
       delay=MAX(0,delay);
       if (!writes.empty()) {
@@ -76,15 +76,15 @@ void DivPlatformK007232::acquire(short* bufL, short* bufR, size_t start, size_t
       const unsigned char vol1=regPool[0x10],vol2=regPool[0x11];
       const signed int lout[2]={(k007232.output(0)*(vol1&0xf)),(k007232.output(1)*(vol2&0xf))};
       const signed int rout[2]={(k007232.output(0)*((vol1>>4)&0xf)),(k007232.output(1)*((vol2>>4)&0xf))};
-      bufL[h]=(lout[0]+lout[1])<<4;
-      bufR[h]=(rout[0]+rout[1])<<4;
+      buf[0][h]=(lout[0]+lout[1])<<4;
+      buf[1][h]=(rout[0]+rout[1])<<4;
       for (int i=0; i<2; i++) {
         oscBuf[i]->data[oscBuf[i]->needle++]=(lout[i]+rout[i])<<4;
       }
     } else {
       const unsigned char vol=regPool[0xc];
       const signed int out[2]={(k007232.output(0)*(vol&0xf)),(k007232.output(1)*((vol>>4)&0xf))};
-      bufL[h]=bufR[h]=(out[0]+out[1])<<4;
+      buf[0][h]=(out[0]+out[1])<<4;
       for (int i=0; i<2; i++) {
         oscBuf[i]->data[oscBuf[i]->needle++]=out[i]<<5;
       }
@@ -448,8 +448,8 @@ void DivPlatformK007232::reset() {
   }
 }
 
-bool DivPlatformK007232::isStereo() {
-  return stereo;
+int DivPlatformK007232::getOutputCount() {
+  return stereo?2:1;
 }
 
 void DivPlatformK007232::notifyInsChange(int ins) {
diff --git a/src/engine/platform/k007232.h b/src/engine/platform/k007232.h
index 04e6e73f..8d9aeb28 100644
--- a/src/engine/platform/k007232.h
+++ b/src/engine/platform/k007232.h
@@ -80,7 +80,7 @@ class DivPlatformK007232: public DivDispatch, public k007232_intf {
   void chWrite(unsigned char ch, unsigned int addr, unsigned char val);
   public:
     u8 read_sample(u8 ne, u32 address);
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -91,7 +91,7 @@ class DivPlatformK007232: public DivDispatch, public k007232_intf {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/lynx.cpp b/src/engine/platform/lynx.cpp
index 3af5dbd8..7ae060b7 100644
--- a/src/engine/platform/lynx.cpp
+++ b/src/engine/platform/lynx.cpp
@@ -130,8 +130,8 @@ const char** DivPlatformLynx::getRegisterSheet() {
   return regCheatSheetLynx;
 }
 
-void DivPlatformLynx::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformLynx::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     for (int i=0; i<4; i++) {
       if (chan[i].pcm && chan[i].sample>=0 && chan[i].sample<parent->song.sampleLen) {
         chan[i].sampleAccum-=chan[i].sampleFreq;
@@ -156,7 +156,7 @@ void DivPlatformLynx::acquire(short* bufL, short* bufR, size_t start, size_t len
       }
     }
 
-    mikey->sampleAudio( bufL + h, bufR + h, 1, oscBuf );
+    mikey->sampleAudio(buf[0]+h,buf[1]+h,1,oscBuf);
   }
 }
 
@@ -393,8 +393,8 @@ void DivPlatformLynx::muteChannel(int ch, bool mute) {
   if (chan[ch].active) WRITE_VOLUME(ch,(isMuted[ch]?0:(chan[ch].outVol&127)));
 }
 
-bool DivPlatformLynx::isStereo() {
-  return true;
+int DivPlatformLynx::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformLynx::forceIns() {
diff --git a/src/engine/platform/lynx.h b/src/engine/platform/lynx.h
index 463aad3d..ec2208d3 100644
--- a/src/engine/platform/lynx.h
+++ b/src/engine/platform/lynx.h
@@ -68,7 +68,7 @@ class DivPlatformLynx: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -79,7 +79,7 @@ class DivPlatformLynx: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     bool keyOffAffectsPorta(int ch);
     //int getPortaFloor(int ch);
diff --git a/src/engine/platform/mmc5.cpp b/src/engine/platform/mmc5.cpp
index a00dd771..6e44ea1c 100644
--- a/src/engine/platform/mmc5.cpp
+++ b/src/engine/platform/mmc5.cpp
@@ -43,8 +43,8 @@ const char** DivPlatformMMC5::getRegisterSheet() {
   return regCheatSheetMMC5;
 }
 
-void DivPlatformMMC5::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformMMC5::acquire(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     if (dacSample!=-1) {
       dacPeriod+=dacRate;
       if (dacPeriod>=rate) {
@@ -81,7 +81,7 @@ void DivPlatformMMC5::acquire(short* bufL, short* bufR, size_t start, size_t len
     }
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    bufL[i]=sample;
+    buf[0][i]=sample;
 
     if (++writeOscBuf>=32) {
       writeOscBuf=0;
diff --git a/src/engine/platform/mmc5.h b/src/engine/platform/mmc5.h
index a3ab9053..3e83ff06 100644
--- a/src/engine/platform/mmc5.h
+++ b/src/engine/platform/mmc5.h
@@ -50,7 +50,7 @@ class DivPlatformMMC5: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/msm5232.cpp b/src/engine/platform/msm5232.cpp
index 4781945f..7405f8d3 100644
--- a/src/engine/platform/msm5232.cpp
+++ b/src/engine/platform/msm5232.cpp
@@ -45,8 +45,8 @@ const char** DivPlatformMSM5232::getRegisterSheet() {
   return regCheatSheetMSM5232;
 }
 
-void DivPlatformMSM5232::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformMSM5232::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     while (!writes.empty()) {
       QueuedWrite w=writes.front();
       msm->write(w.addr,w.val);
@@ -75,9 +75,9 @@ void DivPlatformMSM5232::acquire(short* bufL, short* bufR, size_t start, size_t
     }
     
     //printf("tempL: %d tempR: %d\n",tempL,tempR);
-    bufL[h]=0;
+    buf[0][h]=0;
     for (int i=0; i<8; i++) {
-      bufL[h]+=(temp[i]*partVolume[i])>>8;
+      buf[0][h]+=(temp[i]*partVolume[i])>>8;
     }
   }
 }
@@ -371,8 +371,8 @@ void DivPlatformMSM5232::reset() {
   }
 }
 
-bool DivPlatformMSM5232::isStereo() {
-  return false;
+int DivPlatformMSM5232::getOutputCount() {
+  return 1;
 }
 
 bool DivPlatformMSM5232::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/msm5232.h b/src/engine/platform/msm5232.h
index 2d4b9705..26d2a34b 100644
--- a/src/engine/platform/msm5232.h
+++ b/src/engine/platform/msm5232.h
@@ -60,7 +60,7 @@ class DivPlatformMSM5232: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -71,7 +71,7 @@ class DivPlatformMSM5232: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/msm6258.cpp b/src/engine/platform/msm6258.cpp
index 32fe24cc..af1472af 100644
--- a/src/engine/platform/msm6258.cpp
+++ b/src/engine/platform/msm6258.cpp
@@ -30,12 +30,12 @@ const char** DivPlatformMSM6258::getRegisterSheet() {
   return NULL;
 }
 
-void DivPlatformMSM6258::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformMSM6258::acquire(short** buf, size_t len) {
   short* outs[2]={
     &msmOut,
     NULL
   };
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (--msmClockCount<0) {
       if (--msmDividerCount<=0) {
         if (!writes.empty()) {
@@ -78,12 +78,12 @@ void DivPlatformMSM6258::acquire(short* bufL, short* bufR, size_t start, size_t
     }
     
     if (isMuted[0]) {
-      bufL[h]=0;
-      bufR[h]=0;
+      buf[0][h]=0;
+      buf[1][h]=0;
       oscBuf[0]->data[oscBuf[0]->needle++]=0;
     } else {
-      bufL[h]=(msmPan&2)?msmOut:0;
-      bufR[h]=(msmPan&1)?msmOut:0;
+      buf[0][h]=(msmPan&2)?msmOut:0;
+      buf[1][h]=(msmPan&1)?msmOut:0;
       oscBuf[0]->data[oscBuf[0]->needle++]=msmPan?msmOut:0;
     }
   }
@@ -336,8 +336,8 @@ void DivPlatformMSM6258::reset() {
   delay=0;
 }
 
-bool DivPlatformMSM6258::isStereo() {
-  return true;
+int DivPlatformMSM6258::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformMSM6258::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/msm6258.h b/src/engine/platform/msm6258.h
index d64d40b4..47d079ca 100644
--- a/src/engine/platform/msm6258.h
+++ b/src/engine/platform/msm6258.h
@@ -58,7 +58,7 @@ class DivPlatformMSM6258: public DivDispatch {
     friend void putDispatchChan(void*,int,int);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -69,7 +69,7 @@ class DivPlatformMSM6258: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void notifyInsChange(int ins);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/msm6295.cpp b/src/engine/platform/msm6295.cpp
index 2423167f..bc41091c 100644
--- a/src/engine/platform/msm6295.cpp
+++ b/src/engine/platform/msm6295.cpp
@@ -37,8 +37,8 @@ u8 DivPlatformMSM6295::read_byte(u32 address) {
   return adpcmMem[address&0x3ffff];
 }
 
-void DivPlatformMSM6295::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformMSM6295::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     if (delay<=0) {
       if (!writes.empty()) {
         QueuedWrite& w=writes.front();
@@ -75,7 +75,7 @@ void DivPlatformMSM6295::acquire(short* bufL, short* bufR, size_t start, size_t
     msm.tick();
     msm.tick();
   
-    bufL[h]=msm.out()<<4;
+    buf[0][h]=msm.out()<<4;
 
     if (++updateOsc>=22) {
       updateOsc=0;
diff --git a/src/engine/platform/msm6295.h b/src/engine/platform/msm6295.h
index e3339df3..77a82f58 100644
--- a/src/engine/platform/msm6295.h
+++ b/src/engine/platform/msm6295.h
@@ -64,7 +64,7 @@ class DivPlatformMSM6295: public DivDispatch, public vgsound_emu_mem_intf {
   
   public:
     virtual u8 read_byte(u32 address) override;
-    virtual void acquire(short* bufL, short* bufR, size_t start, size_t len) override;
+    virtual void acquire(short** buf, size_t len) override;
     virtual int dispatch(DivCommand c) override;
     virtual void* getChanState(int chan) override;
     virtual DivMacroInt* getChanMacroInt(int ch) override;
diff --git a/src/engine/platform/n163.cpp b/src/engine/platform/n163.cpp
index c3efd5ac..7f337e98 100644
--- a/src/engine/platform/n163.cpp
+++ b/src/engine/platform/n163.cpp
@@ -108,13 +108,13 @@ const char** DivPlatformN163::getRegisterSheet() {
   return regCheatSheetN163;
 }
 
-void DivPlatformN163::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformN163::acquire(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     n163.tick();
     int out=(n163.out()<<6)*2; // scale to 16 bit
     if (out>32767) out=32767;
     if (out<-32768) out=-32768;
-    bufL[i]=bufR[i]=out;
+    buf[0][i]=buf[1][i]=out;
 
     if (n163.voice_cycle()==0x78) for (int i=0; i<8; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=n163.voice_out(i)<<7;
diff --git a/src/engine/platform/n163.h b/src/engine/platform/n163.h
index 872c622b..30eb222c 100644
--- a/src/engine/platform/n163.h
+++ b/src/engine/platform/n163.h
@@ -74,7 +74,7 @@ class DivPlatformN163: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/namcowsg.cpp b/src/engine/platform/namcowsg.cpp
index 10b2aeb2..cb4540f5 100644
--- a/src/engine/platform/namcowsg.cpp
+++ b/src/engine/platform/namcowsg.cpp
@@ -151,7 +151,7 @@ const char** DivPlatformNamcoWSG::getRegisterSheet() {
   return regCheatSheetNamcoWSG;
 }
 
-void DivPlatformNamcoWSG::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformNamcoWSG::acquire(short** buf, size_t len) {
   while (!writes.empty()) {
     QueuedWrite w=writes.front();
     switch (devType) {
@@ -171,11 +171,11 @@ void DivPlatformNamcoWSG::acquire(short* bufL, short* bufR, size_t start, size_t
     regPool[w.addr&0x3f]=w.val;
     writes.pop();
   }
-  for (size_t h=start; h<start+len; h++) {
-    short* buf[2]={
-      bufL+h, bufR+h
+  for (size_t h=0; h<len; h++) {
+    short* bufC[2]={
+      buf[0]+h, buf[1]+h
     };
-    namco->sound_stream_update(buf,1);
+    namco->sound_stream_update(bufC,1);
     for (int i=0; i<chans; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=namco->m_channel_list[i].last_out*chans;
     }
@@ -494,8 +494,8 @@ void DivPlatformNamcoWSG::reset() {
   namco->device_start(NULL);
 }
 
-bool DivPlatformNamcoWSG::isStereo() {
-  return (devType==30);
+int DivPlatformNamcoWSG::getOutputCount() {
+  return (devType==30)?2:1;
 }
 
 bool DivPlatformNamcoWSG::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/namcowsg.h b/src/engine/platform/namcowsg.h
index 127f84aa..87a2517e 100644
--- a/src/engine/platform/namcowsg.h
+++ b/src/engine/platform/namcowsg.h
@@ -54,7 +54,7 @@ class DivPlatformNamcoWSG: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -65,7 +65,7 @@ class DivPlatformNamcoWSG: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setDeviceType(int type);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/nes.cpp b/src/engine/platform/nes.cpp
index d0cae5ec..3af55a0d 100644
--- a/src/engine/platform/nes.cpp
+++ b/src/engine/platform/nes.cpp
@@ -100,8 +100,8 @@ void DivPlatformNES::doWrite(unsigned short addr, unsigned char data) {
     } \
   }
 
-void DivPlatformNES::acquire_puNES(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformNES::acquire_puNES(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     doPCM;
   
     apu_tick(nes,NULL);
@@ -112,7 +112,7 @@ void DivPlatformNES::acquire_puNES(short* bufL, short* bufR, size_t start, size_
     int sample=(pulse_output(nes)+tnd_output(nes))<<6;
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    bufL[i]=sample;
+    buf[0][i]=sample;
     if (++writeOscBuf>=32) {
       writeOscBuf=0;
       oscBuf[0]->data[oscBuf[0]->needle++]=isMuted[0]?0:(nes->S1.output<<11);
@@ -124,10 +124,10 @@ void DivPlatformNES::acquire_puNES(short* bufL, short* bufR, size_t start, size_
   }
 }
 
-void DivPlatformNES::acquire_NSFPlay(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformNES::acquire_NSFPlay(short** buf, size_t len) {
   int out1[2];
   int out2[2];
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     doPCM;
   
     nes1_NP->Tick(1);
@@ -139,7 +139,7 @@ void DivPlatformNES::acquire_NSFPlay(short* bufL, short* bufR, size_t start, siz
     int sample=(out1[0]+out1[1]+out2[0]+out2[1])<<1;
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    bufL[i]=sample;
+    buf[0][i]=sample;
     if (++writeOscBuf>=32) {
       writeOscBuf=0;
       oscBuf[0]->data[oscBuf[0]->needle++]=nes1_NP->out[0]<<11;
@@ -151,11 +151,11 @@ void DivPlatformNES::acquire_NSFPlay(short* bufL, short* bufR, size_t start, siz
   }
 }
 
-void DivPlatformNES::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformNES::acquire(short** buf, size_t len) {
   if (useNP) {
-    acquire_NSFPlay(bufL,bufR,start,len);
+    acquire_NSFPlay(buf,len);
   } else {
-    acquire_puNES(bufL,bufR,start,len);
+    acquire_puNES(buf,len);
   }
 }
 
diff --git a/src/engine/platform/nes.h b/src/engine/platform/nes.h
index d9f43e91..22ccfd91 100644
--- a/src/engine/platform/nes.h
+++ b/src/engine/platform/nes.h
@@ -68,11 +68,11 @@ class DivPlatformNES: public DivDispatch {
 
   void doWrite(unsigned short addr, unsigned char data);
   unsigned char calcDPCMRate(int inRate);
-  void acquire_puNES(short* bufL, short* bufR, size_t start, size_t len);
-  void acquire_NSFPlay(short* bufL, short* bufR, size_t start, size_t len);
+  void acquire_puNES(short** buf, size_t len);
+  void acquire_NSFPlay(short** buf, size_t len);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/opl.cpp b/src/engine/platform/opl.cpp
index 5af5de8c..51f85851 100644
--- a/src/engine/platform/opl.cpp
+++ b/src/engine/platform/opl.cpp
@@ -159,13 +159,13 @@ const int orderedOpsL[4]={
 #define ADDR_FREQH 0xb0
 #define ADDR_LR_FB_ALG 0xc0
 
-void DivPlatformOPL::acquire_nuked(short* bufL, short* bufR, size_t start, size_t len) {
-  static short o[2];
-  static int os[2];
+void DivPlatformOPL::acquire_nuked(short** buf, size_t len) {
+  static short o[4];
+  static int os[4];
   static ymfm::ymfm_output<2> aOut;
 
-  for (size_t h=start; h<start+len; h++) {
-    os[0]=0; os[1]=0;
+  for (size_t h=0; h<len; h++) {
+    os[0]=0; os[1]=0; os[2]=0; os[3]=0;
     if (!writes.empty() && --delay<0) {
       delay=1;
       QueuedWrite& w=writes.front();
@@ -194,11 +194,14 @@ void DivPlatformOPL::acquire_nuked(short* bufL, short* bufR, size_t start, size_
     }
 
     if (downsample) {
-      OPL3_GenerateResampled(&fm,o);
+      OPL3_Generate4ChResampled(&fm,o);
     } else {
-      OPL3_Generate(&fm,o);
+      OPL3_Generate4Ch(&fm,o);
     }
-    os[0]+=o[0]; os[1]+=o[1];
+    os[0]+=o[0];
+    os[1]+=o[1];
+    os[2]+=o[2];
+    os[3]+=o[3];
 
     if (adpcmChan>=0) {
       adpcmB->clock();
@@ -225,6 +228,12 @@ void DivPlatformOPL::acquire_nuked(short* bufL, short* bufR, size_t start, size_
         if (fm.channel[i].out[1]!=NULL) {
           oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[1];
         }
+        if (fm.channel[i].out[2]!=NULL) {
+          oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[2];
+        }
+        if (fm.channel[i].out[3]!=NULL) {
+          oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[3];
+        }
         oscBuf[i]->data[oscBuf[i]->needle]<<=1;
         oscBuf[i]->needle++;
       }
@@ -244,6 +253,12 @@ void DivPlatformOPL::acquire_nuked(short* bufL, short* bufR, size_t start, size_
         if (fm.channel[i].out[1]!=NULL) {
           oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[1];
         }
+        if (fm.channel[i].out[2]!=NULL) {
+          oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[2];
+        }
+        if (fm.channel[i].out[3]!=NULL) {
+          oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[3];
+        }
         oscBuf[i]->data[oscBuf[i]->needle]<<=1;
         oscBuf[i]->needle++;
       }
@@ -254,19 +269,27 @@ void DivPlatformOPL::acquire_nuked(short* bufL, short* bufR, size_t start, size_
 
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
+
+    if (os[2]<-32768) os[2]=-32768;
+    if (os[2]>32767) os[2]=32767;
+
+    if (os[3]<-32768) os[3]=-32768;
+    if (os[3]>32767) os[3]=32767;
   
-    bufL[h]=os[0];
+    buf[0][h]=os[0];
     if (oplType==3 || oplType==759) {
-      bufR[h]=os[1];
+      buf[1][h]=os[1];
+      buf[2][h]=os[2];
+      buf[3][h]=os[3];
     }
   }
 }
 
-void DivPlatformOPL::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformOPL::acquire(short** buf, size_t len) {
   //if (useYMFM) {
-  //  acquire_ymfm(bufL,bufR,start,len);
+  //  acquire_ymfm(buf,len);
   //} else {
-    acquire_nuked(bufL,bufR,start,len);
+    acquire_nuked(buf,len);
   //}
 }
 
@@ -314,7 +337,7 @@ void DivPlatformOPL::tick(bool sysTick) {
     }
 
     if (oplType==3 && chan[i].std.panL.had) {
-      chan[i].pan=((chan[i].std.panL.val&1)<<1)|((chan[i].std.panL.val&2)>>1);
+      chan[i].pan=((chan[i].std.panL.val&1)<<1)|((chan[i].std.panL.val&2)>>1)|((chan[i].std.panL.val&4)<<1)|((chan[i].std.panL.val&8)>>1);
     }
 
     if (chan[i].std.pitch.had) {
@@ -347,9 +370,9 @@ void DivPlatformOPL::tick(bool sysTick) {
           rWrite(chanMap[i+1]+ADDR_LR_FB_ALG,((chan[i].state.alg>>1)&1)|(chan[i].state.fb<<1));
         }
       } else {
-        rWrite(chanMap[i]+ADDR_LR_FB_ALG,(chan[i].state.alg&1)|(chan[i].state.fb<<1)|((chan[i].pan&3)<<4));
+        rWrite(chanMap[i]+ADDR_LR_FB_ALG,(chan[i].state.alg&1)|(chan[i].state.fb<<1)|((chan[i].pan&15)<<4));
         if (ops==4) {
-          rWrite(chanMap[i+1]+ADDR_LR_FB_ALG,((chan[i].state.alg>>1)&1)|(chan[i].state.fb<<1)|((chan[i].pan&3)<<4));
+          rWrite(chanMap[i+1]+ADDR_LR_FB_ALG,((chan[i].state.alg>>1)&1)|(chan[i].state.fb<<1)|((chan[i].pan&15)<<4));
         }
       }
     }
@@ -659,9 +682,9 @@ void DivPlatformOPL::muteChannel(int ch, bool mute) {
       rWrite(chanMap[ch+1]+ADDR_LR_FB_ALG,((chan[ch].state.alg>>1)&1)|(chan[ch].state.fb<<1));
     }
   } else {
-    rWrite(chanMap[ch]+ADDR_LR_FB_ALG,(chan[ch].state.alg&1)|(chan[ch].state.fb<<1)|((chan[ch].pan&3)<<4));
+    rWrite(chanMap[ch]+ADDR_LR_FB_ALG,(chan[ch].state.alg&1)|(chan[ch].state.fb<<1)|((chan[ch].pan&15)<<4));
     if (ops==4) {
-      rWrite(chanMap[ch+1]+ADDR_LR_FB_ALG,((chan[ch].state.alg>>1)&1)|(chan[ch].state.fb<<1)|((chan[ch].pan&3)<<4));
+      rWrite(chanMap[ch+1]+ADDR_LR_FB_ALG,((chan[ch].state.alg>>1)&1)|(chan[ch].state.fb<<1)|((chan[ch].pan&15)<<4));
     }
   }
 }
@@ -797,7 +820,7 @@ int DivPlatformOPL::dispatch(DivCommand c) {
               rWrite(chanMap[ch]+ADDR_LR_FB_ALG,(chan[ch].state.alg&1)|(chan[ch].state.fb<<1));
             } else {
               oldWrites[chanMap[ch]+ADDR_LR_FB_ALG]=-1;
-              rWrite(chanMap[ch]+ADDR_LR_FB_ALG,(chan[ch].state.alg&1)|(chan[ch].state.fb<<1)|((chan[ch].pan&3)<<4));
+              rWrite(chanMap[ch]+ADDR_LR_FB_ALG,(chan[ch].state.alg&1)|(chan[ch].state.fb<<1)|((chan[ch].pan&15)<<4));
             }
           }
         } else {
@@ -847,10 +870,10 @@ int DivPlatformOPL::dispatch(DivCommand c) {
             }
           } else {
             oldWrites[chanMap[c.chan]+ADDR_LR_FB_ALG]=-1;
-            rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&3)<<4));
+            rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
             if (ops==4) {
               oldWrites[chanMap[c.chan+1]+ADDR_LR_FB_ALG]=-1;
-              rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&3)<<4));
+              rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
             }
           }
         }
@@ -956,10 +979,11 @@ int DivPlatformOPL::dispatch(DivCommand c) {
     case DIV_CMD_PANNING: {
       if (oplType!=3) break;
       if (c.chan==adpcmChan) break;
-      if (c.value==0 && c.value2==0) {
-        chan[c.chan].pan=3;
+      chan[c.chan].pan&=~3;
+      if (c.value==0 && c.value2==0 && compatPan) {
+        chan[c.chan].pan|=3;
       } else {
-        chan[c.chan].pan=(c.value>0)|((c.value2>0)<<1);
+        chan[c.chan].pan|=(c.value>0)|((c.value2>0)<<1);
       }
       int ops=(slots[3][c.chan]!=255 && chan[c.chan].state.ops==4 && oplType==3)?4:2;
       if (isMuted[c.chan]) {
@@ -968,9 +992,36 @@ int DivPlatformOPL::dispatch(DivCommand c) {
           rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1));
         }
       } else {
-        rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&3)<<4));
+        rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
         if (ops==4) {
-          rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&3)<<4));
+          rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
+        }
+      }
+      break;
+    }
+    case DIV_CMD_SURROUND_PANNING: {
+      if (oplType!=3) break;
+      if (c.chan==adpcmChan) break;
+
+      if (c.value==2) {
+        chan[c.chan].pan&=3;
+        if (c.value2>0) chan[c.chan].pan|=4;
+      } else if (c.value==3) {
+        if (c.value2>0) chan[c.chan].pan|=8;
+      } else {
+        break;
+      }
+
+      int ops=(slots[3][c.chan]!=255 && chan[c.chan].state.ops==4 && oplType==3)?4:2;
+      if (isMuted[c.chan]) {
+        rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1));
+        if (ops==4) {
+          rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1));
+        }
+      } else {
+        rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
+        if (ops==4) {
+          rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
         }
       }
       break;
@@ -1049,9 +1100,9 @@ int DivPlatformOPL::dispatch(DivCommand c) {
           rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1));
         }
       } else {
-        rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&3)<<4));
+        rWrite(chanMap[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
         if (ops==4) {
-          rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&3)<<4));
+          rWrite(chanMap[c.chan+1]+ADDR_LR_FB_ALG,((chan[c.chan].state.alg>>1)&1)|(chan[c.chan].state.fb<<1)|((chan[c.chan].pan&15)<<4));
         }
       }
       break;
@@ -1431,9 +1482,9 @@ void DivPlatformOPL::forceIns() {
         rWrite(chanMap[i+1]+ADDR_LR_FB_ALG,((chan[i].state.alg>>1)&1)|(chan[i].state.fb<<1));
       }
     } else {
-      rWrite(chanMap[i]+ADDR_LR_FB_ALG,(chan[i].state.alg&1)|(chan[i].state.fb<<1)|((chan[i].pan&3)<<4));
+      rWrite(chanMap[i]+ADDR_LR_FB_ALG,(chan[i].state.alg&1)|(chan[i].state.fb<<1)|((chan[i].pan&15)<<4));
       if (ops==4) {
-        rWrite(chanMap[i+1]+ADDR_LR_FB_ALG,((chan[i].state.alg>>1)&1)|(chan[i].state.fb<<1)|((chan[i].pan&3)<<4));
+        rWrite(chanMap[i+1]+ADDR_LR_FB_ALG,((chan[i].state.alg>>1)&1)|(chan[i].state.fb<<1)|((chan[i].pan&15)<<4));
       }
     }
     */
@@ -1568,8 +1619,8 @@ void DivPlatformOPL::reset() {
   immWrite(0xbd,(dam<<7)|(dvb<<6)|(properDrums<<5)|drumState);
 }
 
-bool DivPlatformOPL::isStereo() {
-  return (oplType==3 || oplType==759);
+int DivPlatformOPL::getOutputCount() {
+  return (oplType==3 || oplType==759)?4:1;
 }
 
 bool DivPlatformOPL::keyOffAffectsArp(int ch) {
@@ -1681,6 +1732,8 @@ void DivPlatformOPL::setFlags(const DivConfig& flags) {
     rate=chipClock/36;
   }*/
 
+  compatPan=false;
+
   switch (chipType) {
     default:
     case 1: case 2: case 8950:
@@ -1729,6 +1782,7 @@ void DivPlatformOPL::setFlags(const DivConfig& flags) {
       CHECK_CUSTOM_CLOCK;
       rate=chipClock/288;
       chipRateBase=rate;
+      compatPan=flags.getBool("compatPan",false);
       break;
     case 4:
       switch (flags.getInt("clockSel",0)) {
diff --git a/src/engine/platform/opl.h b/src/engine/platform/opl.h
index f4a6788c..5e6b5316 100644
--- a/src/engine/platform/opl.h
+++ b/src/engine/platform/opl.h
@@ -92,7 +92,7 @@ class DivPlatformOPL: public DivDispatch {
 
     unsigned char lfoValue;
 
-    bool useYMFM, update4OpMask, pretendYMU, downsample;
+    bool useYMFM, update4OpMask, pretendYMU, downsample, compatPan;
   
     short oldWrites[512];
     short pendingWrites[512];
@@ -104,11 +104,11 @@ class DivPlatformOPL: public DivDispatch {
     friend void putDispatchChip(void*,int);
     friend void putDispatchChan(void*,int,int);
 
-    void acquire_nuked(short* bufL, short* bufR, size_t start, size_t len);
-    //void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_nuked(short** buf, size_t len);
+    //void acquire_ymfm(short** buf, size_t len);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -119,7 +119,7 @@ class DivPlatformOPL: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     void setYMFM(bool use);
     void setOPLType(int type, bool drums);
     bool keyOffAffectsArp(int ch);
diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index 8ffd6501..3556679e 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -39,11 +39,11 @@ const unsigned char visMapOPLL[9]={
   6, 7, 8, 3, 4, 5, 0, 1, 2
 };
 
-void DivPlatformOPLL::acquire_nuked(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformOPLL::acquire_nuked(short** buf, size_t len) {
   static int o[2];
   static int os;
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os=0;
     for (int i=0; i<9; i++) {
       if (!writes.empty() && --delay<0) {
@@ -83,15 +83,15 @@ void DivPlatformOPLL::acquire_nuked(short* bufL, short* bufR, size_t start, size
     os*=50;
     if (os<-32768) os=-32768;
     if (os>32767) os=32767;
-    bufL[h]=os;
+    buf[0][h]=os;
   }
 }
 
-void DivPlatformOPLL::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformOPLL::acquire_ymfm(short** buf, size_t len) {
 }
 
-void DivPlatformOPLL::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  acquire_nuked(bufL,bufR,start,len);
+void DivPlatformOPLL::acquire(short** buf, size_t len) {
+  acquire_nuked(buf,len);
 }
 
 void DivPlatformOPLL::tick(bool sysTick) {
diff --git a/src/engine/platform/opll.h b/src/engine/platform/opll.h
index a1eb7004..74d7b1bc 100644
--- a/src/engine/platform/opll.h
+++ b/src/engine/platform/opll.h
@@ -77,11 +77,11 @@ class DivPlatformOPLL: public DivDispatch {
     friend void putDispatchChip(void*,int);
     friend void putDispatchChan(void*,int,int);
 
-    void acquire_nuked(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_nuked(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/pce.cpp b/src/engine/platform/pce.cpp
index 3d9c0aee..e8ad6db4 100644
--- a/src/engine/platform/pce.cpp
+++ b/src/engine/platform/pce.cpp
@@ -53,8 +53,8 @@ const char** DivPlatformPCE::getRegisterSheet() {
   return regCheatSheetPCE;
 }
 
-void DivPlatformPCE::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformPCE::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     // PCM part
     for (int i=0; i<6; i++) {
       if (chan[i].pcm && chan[i].dacSample!=-1) {
@@ -113,8 +113,8 @@ void DivPlatformPCE::acquire(short* bufL, short* bufR, size_t start, size_t len)
     if (tempR[0]>32767) tempR[0]=32767;
     
     //printf("tempL: %d tempR: %d\n",tempL,tempR);
-    bufL[h]=tempL[0];
-    bufR[h]=tempR[0];
+    buf[0][h]=tempL[0];
+    buf[1][h]=tempR[0];
   }
 }
 
@@ -547,8 +547,8 @@ void DivPlatformPCE::reset() {
   delay=500;
 }
 
-bool DivPlatformPCE::isStereo() {
-  return true;
+int DivPlatformPCE::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformPCE::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/pce.h b/src/engine/platform/pce.h
index 7a417a2a..6493840c 100644
--- a/src/engine/platform/pce.h
+++ b/src/engine/platform/pce.h
@@ -76,7 +76,7 @@ class DivPlatformPCE: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -87,7 +87,7 @@ class DivPlatformPCE: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/pcmdac.cpp b/src/engine/platform/pcmdac.cpp
index abcdd39f..2843f079 100644
--- a/src/engine/platform/pcmdac.cpp
+++ b/src/engine/platform/pcmdac.cpp
@@ -26,13 +26,13 @@
 // to ease the driver, freqency register is a 8.16 counter relative to output sample rate
 #define CHIP_FREQBASE 65536
 
-void DivPlatformPCMDAC::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPCMDAC::acquire(short** buf, size_t len) {
   const int depthScale=(15-outDepth);
   int output=0;
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (!chan[0].active || isMuted) {
-      bufL[h]=0;
-      bufR[h]=0;
+      buf[0][h]=0;
+      buf[1][h]=0;
       oscBuf->data[oscBuf->needle++]=0;
       continue;
     }
@@ -157,12 +157,12 @@ void DivPlatformPCMDAC::acquire(short* bufL, short* bufR, size_t start, size_t l
     output=output*chan[0].vol*chan[0].envVol/16384;
     oscBuf->data[oscBuf->needle++]=output;
     if (outStereo) {
-      bufL[h]=((output*chan[0].panL)>>(depthScale+8))<<depthScale;
-      bufR[h]=((output*chan[0].panR)>>(depthScale+8))<<depthScale;
+      buf[0][h]=((output*chan[0].panL)>>(depthScale+8))<<depthScale;
+      buf[1][h]=((output*chan[0].panR)>>(depthScale+8))<<depthScale;
     } else {
       output=(output>>depthScale)<<depthScale;
-      bufL[h]=output;
-      bufR[h]=output;
+      buf[0][h]=output;
+      buf[1][h]=output;
     }
   }
 }
@@ -410,8 +410,8 @@ void DivPlatformPCMDAC::reset() {
   chan[0].ws.init(NULL,32,255);
 }
 
-bool DivPlatformPCMDAC::isStereo() {
-  return true;
+int DivPlatformPCMDAC::getOutputCount() {
+  return 2;
 }
 
 DivMacroInt* DivPlatformPCMDAC::getChanMacroInt(int ch) {
diff --git a/src/engine/platform/pcmdac.h b/src/engine/platform/pcmdac.h
index 95c01424..9224ccc7 100644
--- a/src/engine/platform/pcmdac.h
+++ b/src/engine/platform/pcmdac.h
@@ -67,7 +67,7 @@ class DivPlatformPCMDAC: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivDispatchOscBuffer* getOscBuffer(int chan);
@@ -75,7 +75,7 @@ class DivPlatformPCMDAC: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     DivMacroInt* getChanMacroInt(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsChange(int ins);
diff --git a/src/engine/platform/pcspkr.cpp b/src/engine/platform/pcspkr.cpp
index 5100e1d9..70c846f7 100644
--- a/src/engine/platform/pcspkr.cpp
+++ b/src/engine/platform/pcspkr.cpp
@@ -193,9 +193,9 @@ const char** DivPlatformPCSpeaker::getRegisterSheet() {
 const float cut=0.05;
 const float reso=0.06;
 
-void DivPlatformPCSpeaker::acquire_unfilt(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPCSpeaker::acquire_unfilt(short** buf, size_t len) {
   int out=0;
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     if (on) {
       pos-=PCSPKR_DIVIDER;
       if (pos>freq) pos=freq;
@@ -207,17 +207,17 @@ void DivPlatformPCSpeaker::acquire_unfilt(short* bufL, short* bufR, size_t start
         }
       }
       out=(pos>(freq>>1) && !isMuted[0])?32767:0;
-      bufL[i]=out;
+      buf[0][i]=out;
       oscBuf->data[oscBuf->needle++]=out;
     } else {
-      bufL[i]=0;
+      buf[0][i]=0;
       oscBuf->data[oscBuf->needle++]=0;
     }
   }
 }
 
-void DivPlatformPCSpeaker::acquire_cone(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformPCSpeaker::acquire_cone(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     if (on) {
       pos-=PCSPKR_DIVIDER;
       if (pos>freq) pos=freq;
@@ -234,17 +234,17 @@ void DivPlatformPCSpeaker::acquire_cone(short* bufL, short* bufR, size_t start,
       float out=(low+band)*0.75;
       if (out>1.0) out=1.0;
       if (out<-1.0) out=-1.0;
-      bufL[i]=out*32767;
+      buf[0][i]=out*32767;
       oscBuf->data[oscBuf->needle++]=out*32767;
     } else {
-      bufL[i]=0;
+      buf[0][i]=0;
       oscBuf->data[oscBuf->needle++]=0;
     }
   }
 }
 
-void DivPlatformPCSpeaker::acquire_piezo(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformPCSpeaker::acquire_piezo(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     if (on) {
       pos-=PCSPKR_DIVIDER;
       if (pos>freq) pos=freq;
@@ -261,10 +261,10 @@ void DivPlatformPCSpeaker::acquire_piezo(short* bufL, short* bufR, size_t start,
       float out=band*0.15-(next-low)*0.06;
       if (out>1.0) out=1.0;
       if (out<-1.0) out=-1.0;
-      bufL[i]=out*32767;
+      buf[0][i]=out*32767;
       oscBuf->data[oscBuf->needle++]=out*32767;
     } else {
-      bufL[i]=0;
+      buf[0][i]=0;
       oscBuf->data[oscBuf->needle++]=0;
     }
   }
@@ -274,7 +274,7 @@ void DivPlatformPCSpeaker::beepFreq(int freq, int delay) {
   realQueueLock.lock();
 #ifdef __linux__
   struct timespec ts;
-  double addition=1000000000.0*(double)delay/(double)rate;
+  double addition=1000000000.0*(double)delay/parent->getAudioDescGot().rate;
   addition+=1500000000.0*((double)parent->getAudioDescGot().bufsize/parent->getAudioDescGot().rate);
   if (clock_gettime(CLOCK_MONOTONIC,&ts)<0) {
     ts.tv_sec=0;
@@ -294,14 +294,14 @@ void DivPlatformPCSpeaker::beepFreq(int freq, int delay) {
   realOutCond.notify_one();
 }
 
-void DivPlatformPCSpeaker::acquire_real(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPCSpeaker::acquire_real(short** buf, size_t len) {
   int out=0;
   if (lastOn!=on || lastFreq!=freq) {
     lastOn=on;
     lastFreq=freq;
-    beepFreq((on && !isMuted[0])?freq:0,start);
+    beepFreq((on && !isMuted[0])?freq:0,parent->getBufferPos());
   }
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     if (on) {
       pos-=PCSPKR_DIVIDER;
       if (pos>freq) pos=freq;
@@ -317,23 +317,23 @@ void DivPlatformPCSpeaker::acquire_real(short* bufL, short* bufR, size_t start,
     } else {
       oscBuf->data[oscBuf->needle++]=0;
     }
-    bufL[i]=0;
+    buf[0][i]=0;
   }
 }
 
-void DivPlatformPCSpeaker::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPCSpeaker::acquire(short** buf, size_t len) {
   switch (speakerType) {
     case 0:
-      acquire_unfilt(bufL,bufR,start,len);
+      acquire_unfilt(buf,len);
       break;
     case 1:
-      acquire_cone(bufL,bufR,start,len);
+      acquire_cone(buf,len);
       break;
     case 2:
-      acquire_piezo(bufL,bufR,start,len);
+      acquire_piezo(buf,len);
       break;
     case 3:
-      acquire_real(bufL,bufR,start,len);
+      acquire_real(buf,len);
       break;
   }
 }
diff --git a/src/engine/platform/pcspkr.h b/src/engine/platform/pcspkr.h
index b3028d78..554c0d07 100644
--- a/src/engine/platform/pcspkr.h
+++ b/src/engine/platform/pcspkr.h
@@ -61,14 +61,14 @@ class DivPlatformPCSpeaker: public DivDispatch {
 
   void beepFreq(int freq, int delay=0);
 
-  void acquire_unfilt(short* bufL, short* bufR, size_t start, size_t len);
-  void acquire_cone(short* bufL, short* bufR, size_t start, size_t len);
-  void acquire_piezo(short* bufL, short* bufR, size_t start, size_t len);
-  void acquire_real(short* bufL, short* bufR, size_t start, size_t len);
+  void acquire_unfilt(short** buf, size_t len);
+  void acquire_cone(short** buf, size_t len);
+  void acquire_piezo(short** buf, size_t len);
+  void acquire_real(short** buf, size_t len);
 
   public:
     void pcSpeakerThread();
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/pet.cpp b/src/engine/platform/pet.cpp
index b3279e8e..b4399bcb 100644
--- a/src/engine/platform/pet.cpp
+++ b/src/engine/platform/pet.cpp
@@ -55,14 +55,14 @@ void DivPlatformPET::rWrite(unsigned int addr, unsigned char val) {
   regPool[addr]=val;
 }
 
-void DivPlatformPET::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPET::acquire(short** buf, size_t len) {
   bool hwSROutput=((regPool[11]>>2)&7)==4;
   if (chan[0].enable) {
     int reload=regPool[8]*2+4;
     if (!hwSROutput) {
       reload+=regPool[9]*512;
     }
-    for (size_t h=start; h<start+len; h++) {
+    for (size_t h=0; h<len; h++) {
       if (SAMP_DIVIDER>chan[0].cnt) {
         chan[0].out=(chan[0].sreg&1)*32767;
         chan[0].sreg=(chan[0].sreg>>1)|((chan[0].sreg&1)<<7);
@@ -70,17 +70,15 @@ void DivPlatformPET::acquire(short* bufL, short* bufR, size_t start, size_t len)
       } else {
         chan[0].cnt-=SAMP_DIVIDER;
       }
-      bufL[h]=chan[0].out;
-      bufR[h]=chan[0].out;
+      buf[0][h]=chan[0].out;
       oscBuf->data[oscBuf->needle++]=chan[0].out;
     }
     // emulate driver writes to PCR
     if (!hwSROutput) regPool[12]=chan[0].out?0xe0:0xc0;
   } else {
     chan[0].out=0;
-    for (size_t h=start; h<start+len; h++) {
-      bufL[h]=0;
-      bufR[h]=0;
+    for (size_t h=0; h<len; h++) {
+      buf[0][h]=0;
       oscBuf->data[oscBuf->needle++]=0;
     }
   }
@@ -287,8 +285,8 @@ void DivPlatformPET::reset() {
   chan[0].std.setEngine(parent);
 }
 
-bool DivPlatformPET::isStereo() {
-  return false;
+int DivPlatformPET::getOutputCount() {
+  return 1;
 }
 
 void DivPlatformPET::notifyInsDeletion(void* ins) {
diff --git a/src/engine/platform/pet.h b/src/engine/platform/pet.h
index 0078e3f3..5942817c 100644
--- a/src/engine/platform/pet.h
+++ b/src/engine/platform/pet.h
@@ -45,7 +45,7 @@ class DivPlatformPET: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -57,7 +57,7 @@ class DivPlatformPET: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     void notifyInsDeletion(void* ins);
-    bool isStereo();
+    int getOutputCount();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
diff --git a/src/engine/platform/pokemini.cpp b/src/engine/platform/pokemini.cpp
index 7625f1ed..9b543153 100644
--- a/src/engine/platform/pokemini.cpp
+++ b/src/engine/platform/pokemini.cpp
@@ -86,9 +86,9 @@ void DivPlatformPokeMini::rWrite(unsigned char addr, unsigned char val) {
   }
 }
 
-void DivPlatformPokeMini::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPokeMini::acquire(short** buf, size_t len) {
   int out=0;
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     for (int j=0; j<PCSPKR_DIVIDER; j++) {
       elapsedMain++;
       if (on) {
@@ -102,10 +102,10 @@ void DivPlatformPokeMini::acquire(short* bufL, short* bufR, size_t start, size_t
     }
     if (on) {
       out=(pos>=pivot && !isMuted[0])?volTable[vol&3]:0;
-      bufL[i]=out;
+      buf[0][i]=out;
       oscBuf->data[oscBuf->needle++]=out;
     } else {
-      bufL[i]=0;
+      buf[0][i]=0;
       oscBuf->data[oscBuf->needle++]=0;
     }
   }
diff --git a/src/engine/platform/pokemini.h b/src/engine/platform/pokemini.h
index 7fc17ddf..80233eb4 100644
--- a/src/engine/platform/pokemini.h
+++ b/src/engine/platform/pokemini.h
@@ -46,7 +46,7 @@ class DivPlatformPokeMini: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/pokey.cpp b/src/engine/platform/pokey.cpp
index a79ec453..8294d9dc 100644
--- a/src/engine/platform/pokey.cpp
+++ b/src/engine/platform/pokey.cpp
@@ -64,16 +64,16 @@ const char** DivPlatformPOKEY::getRegisterSheet() {
   return regCheatSheetPOKEY;
 }
 
-void DivPlatformPOKEY::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPOKEY::acquire(short** buf, size_t len) {
   if (useAltASAP) {
-    acquireASAP(bufL, start, len);
+    acquireASAP(buf[0],len);
   } else {
-    acquireMZ(bufL, start, len);
+    acquireMZ(buf[0],len);
   }
 }
 
-void DivPlatformPOKEY::acquireMZ(short* buf, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformPOKEY::acquireMZ(short* buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     while (!writes.empty()) {
       QueuedWrite w=writes.front();
       Update_pokey_sound_mz(&pokey,w.addr,w.val,0);
@@ -93,14 +93,14 @@ void DivPlatformPOKEY::acquireMZ(short* buf, size_t start, size_t len) {
   }
 }
 
-void DivPlatformPOKEY::acquireASAP(short* buf, size_t start, size_t len) {
+void DivPlatformPOKEY::acquireASAP(short* buf, size_t len) {
   while (!writes.empty()) {
     QueuedWrite w=writes.front();
     altASAP.write(w.addr, w.val);
     writes.pop();
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (++oscBufDelay>=2) {
       oscBufDelay=0;
       buf[h]=altASAP.sampleAudio(oscBuf);
@@ -241,7 +241,7 @@ void DivPlatformPOKEY::tick(bool sysTick) {
       chan[i].ctlChanged=false;
       if ((i==1 && audctl&16) || (i==3 && audctl&8)) {
         // ignore - channel is paired
-      } else if ((i==0 && audctl&16) || (i==0 && audctl&8)) {
+      } else if ((i==0 && audctl&16) || (i==2 && audctl&8)) {
         rWrite(1+(i<<1),0);
         rWrite(3+(i<<1),val);
       } else {
diff --git a/src/engine/platform/pokey.h b/src/engine/platform/pokey.h
index e68178a2..79206a74 100644
--- a/src/engine/platform/pokey.h
+++ b/src/engine/platform/pokey.h
@@ -58,9 +58,9 @@ class DivPlatformPOKEY: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
-    void acquireMZ(short* buf, size_t start, size_t len);
-    void acquireASAP(short* buf, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
+    void acquireMZ(short* buf, size_t len);
+    void acquireASAP(short* buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/pong.cpp b/src/engine/platform/pong.cpp
index 0c97391c..27fd76b3 100644
--- a/src/engine/platform/pong.cpp
+++ b/src/engine/platform/pong.cpp
@@ -23,19 +23,19 @@
 
 #define CHIP_DIVIDER 1024
 
-void DivPlatformPong::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformPong::acquire(short** buf, size_t len) {
   int out=0;
-  for (size_t i=start; i<start+len; i++) {
+  for (size_t i=0; i<len; i++) {
     if (on) {
       if (--pos<=0) {
         pos=(freq?2:1)<<4;
         flip=!flip;
       }
       out=(flip && !isMuted[0])?32767:0;
-      bufL[i]=out;
+      buf[0][i]=out;
       oscBuf->data[oscBuf->needle++]=out;
     } else {
-      bufL[i]=0;
+      buf[0][i]=0;
       oscBuf->data[oscBuf->needle++]=0;
       flip=false;
     }
diff --git a/src/engine/platform/pong.h b/src/engine/platform/pong.h
index 835809f5..8259b14c 100644
--- a/src/engine/platform/pong.h
+++ b/src/engine/platform/pong.h
@@ -39,7 +39,7 @@ class DivPlatformPong: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/qsound.cpp b/src/engine/platform/qsound.cpp
index bc9e0f2a..299e980a 100644
--- a/src/engine/platform/qsound.cpp
+++ b/src/engine/platform/qsound.cpp
@@ -265,11 +265,11 @@ const char** DivPlatformQSound::getRegisterSheet() {
   return regCheatSheetQSound;
 }
 
-void DivPlatformQSound::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformQSound::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     qsound_update(&chip);
-    bufL[h]=chip.out[0];
-    bufR[h]=chip.out[1];
+    buf[0][h]=chip.out[0];
+    buf[1][h]=chip.out[1];
 
     for (int i=0; i<19; i++) {
       int data=chip.voice_output[i]<<2;
@@ -636,8 +636,8 @@ void DivPlatformQSound::reset() {
   immWrite(Q1_ECHO_FEEDBACK, echoFeedback << 6);
 }
 
-bool DivPlatformQSound::isStereo() {
-  return true;
+int DivPlatformQSound::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformQSound::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/qsound.h b/src/engine/platform/qsound.h
index dbdffd05..f0b0ed03 100644
--- a/src/engine/platform/qsound.h
+++ b/src/engine/platform/qsound.h
@@ -62,7 +62,7 @@ class DivPlatformQSound: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -74,7 +74,7 @@ class DivPlatformQSound: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsChange(int ins);
diff --git a/src/engine/platform/rf5c68.cpp b/src/engine/platform/rf5c68.cpp
index bf87ce76..e5484dc7 100644
--- a/src/engine/platform/rf5c68.cpp
+++ b/src/engine/platform/rf5c68.cpp
@@ -54,25 +54,27 @@ void DivPlatformRF5C68::chWrite(unsigned char ch, unsigned int addr, unsigned ch
   }
 }
 
-void DivPlatformRF5C68::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  short buf[16][256];
+// TODO: this code is weird
+//       make sure newDispatch didn't break it up
+void DivPlatformRF5C68::acquire(short** buf, size_t len) {
+  short bufC[16][256];
   short* chBufPtrs[16]={
-    buf[0],buf[1],buf[2],buf[3],buf[4],buf[5],buf[6],buf[7],
-    buf[8],buf[9],buf[10],buf[11],buf[12],buf[13],buf[14],buf[15]
+    bufC[0],bufC[1],bufC[2],bufC[3],bufC[4],bufC[5],bufC[6],bufC[7],
+    bufC[8],bufC[9],bufC[10],bufC[11],bufC[12],bufC[13],bufC[14],bufC[15]
   };
-  size_t pos=start;
+  size_t pos=0;
 
   for (int i=0; i<16; i++) {
-    memset(buf[i],0,256*sizeof(short));
+    memset(bufC[i],0,256*sizeof(short));
   }
 
   while (len > 0) {
     size_t blockLen=MIN(len,256);
-    short* bufPtrs[2]={&bufL[pos],&bufR[pos]};
+    short* bufPtrs[2]={&buf[0][pos],&buf[1][pos]};
     rf5c68.sound_stream_update(bufPtrs,chBufPtrs,blockLen);
     for (int i=0; i<8; i++) {
       for (size_t j=0; j<blockLen; j++) {
-        oscBuf[i]->data[oscBuf[i]->needle++]=buf[i*2][j]+buf[i*2+1][j];
+        oscBuf[i]->data[oscBuf[i]->needle++]=bufC[i*2][j]+bufC[i*2+1][j];
       }
     }
     pos+=blockLen;
@@ -332,8 +334,8 @@ void DivPlatformRF5C68::reset() {
   }
 }
 
-bool DivPlatformRF5C68::isStereo() {
-  return true;
+int DivPlatformRF5C68::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformRF5C68::notifyInsChange(int ins) {
diff --git a/src/engine/platform/rf5c68.h b/src/engine/platform/rf5c68.h
index 2703a290..98fc1a75 100644
--- a/src/engine/platform/rf5c68.h
+++ b/src/engine/platform/rf5c68.h
@@ -56,7 +56,7 @@ class DivPlatformRF5C68: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -67,7 +67,7 @@ class DivPlatformRF5C68: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     void setChipModel(int type);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/saa.cpp b/src/engine/platform/saa.cpp
index 102b0021..924bc73a 100644
--- a/src/engine/platform/saa.cpp
+++ b/src/engine/platform/saa.cpp
@@ -56,7 +56,7 @@ const char** DivPlatformSAA1099::getRegisterSheet() {
   return regCheatSheetSAA;
 }
 
-void DivPlatformSAA1099::acquire_saaSound(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformSAA1099::acquire_saaSound(short** buf, size_t len) {
   if (saaBufLen<len*2) {
     saaBufLen=len*2;
     for (int i=0; i<2; i++) {
@@ -73,19 +73,19 @@ void DivPlatformSAA1099::acquire_saaSound(short* bufL, short* bufR, size_t start
   saa_saaSound->GenerateMany((unsigned char*)saaBuf[0],len,oscBuf);
 #ifdef TA_BIG_ENDIAN
   for (size_t i=0; i<len; i++) {
-    bufL[i+start]=(short)((((unsigned short)saaBuf[0][1+(i<<1)])<<8)|(((unsigned short)saaBuf[0][1+(i<<1)])>>8));
-    bufR[i+start]=(short)((((unsigned short)saaBuf[0][i<<1])<<8)|(((unsigned short)saaBuf[0][i<<1])>>8));
+    buf[0][i]=(short)((((unsigned short)saaBuf[0][1+(i<<1)])<<8)|(((unsigned short)saaBuf[0][1+(i<<1)])>>8));
+    buf[1][i]=(short)((((unsigned short)saaBuf[0][i<<1])<<8)|(((unsigned short)saaBuf[0][i<<1])>>8));
   }
 #else
   for (size_t i=0; i<len; i++) {
-    bufL[i+start]=saaBuf[0][i<<1];
-    bufR[i+start]=saaBuf[0][1+(i<<1)];
+    buf[0][i]=saaBuf[0][i<<1];
+    buf[1][i]=saaBuf[0][1+(i<<1)];
   }
 #endif
 }
 
-void DivPlatformSAA1099::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  acquire_saaSound(bufL,bufR,start,len);
+void DivPlatformSAA1099::acquire(short** buf, size_t len) {
+  acquire_saaSound(buf,len);
 }
 
 inline unsigned char applyPan(unsigned char vol, unsigned char pan) {
@@ -419,8 +419,8 @@ void DivPlatformSAA1099::reset() {
   rWrite(0x1c,1);
 }
 
-bool DivPlatformSAA1099::isStereo() {
-  return true;
+int DivPlatformSAA1099::getOutputCount() {
+  return 2;
 }
 
 int DivPlatformSAA1099::getPortaFloor(int ch) {
diff --git a/src/engine/platform/saa.h b/src/engine/platform/saa.h
index 055a0979..97bdbc60 100644
--- a/src/engine/platform/saa.h
+++ b/src/engine/platform/saa.h
@@ -71,10 +71,10 @@ class DivPlatformSAA1099: public DivDispatch {
     friend void putDispatchChip(void*,int);
     friend void putDispatchChan(void*,int,int);
 
-    void acquire_saaSound(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_saaSound(short** buf, size_t len);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -86,7 +86,7 @@ class DivPlatformSAA1099: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     void setFlags(const DivConfig& flags);
-    bool isStereo();
+    int getOutputCount();
     int getPortaFloor(int ch);
     bool keyOffAffectsArp(int ch);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/scc.cpp b/src/engine/platform/scc.cpp
index 0f5e4585..fcb55f25 100644
--- a/src/engine/platform/scc.cpp
+++ b/src/engine/platform/scc.cpp
@@ -80,13 +80,13 @@ const char** DivPlatformSCC::getRegisterSheet() {
   return isPlus ? regCheatSheetSCCPlus : regCheatSheetSCC;
 }
 
-void DivPlatformSCC::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformSCC::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     for (int i=0; i<16; i++) {
       scc->tick();
     }
     short out=(short)scc->out()<<5;
-    bufL[h]=bufR[h]=out;
+    buf[0][h]=out;
 
     for (int i=0; i<5; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=scc->voice_out(i)<<7;
@@ -335,8 +335,8 @@ void DivPlatformSCC::reset() {
   lastUpdated34=0;
 }
 
-bool DivPlatformSCC::isStereo() {
-  return false;
+int DivPlatformSCC::getOutputCount() {
+  return 1;
 }
 
 void DivPlatformSCC::notifyWaveChange(int wave) {
diff --git a/src/engine/platform/scc.h b/src/engine/platform/scc.h
index 5c4db4e2..1c736472 100644
--- a/src/engine/platform/scc.h
+++ b/src/engine/platform/scc.h
@@ -50,7 +50,7 @@ class DivPlatformSCC: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -61,7 +61,7 @@ class DivPlatformSCC: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     void notifyWaveChange(int wave);
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
diff --git a/src/engine/platform/segapcm.cpp b/src/engine/platform/segapcm.cpp
index a206de5c..25af4211 100644
--- a/src/engine/platform/segapcm.cpp
+++ b/src/engine/platform/segapcm.cpp
@@ -26,10 +26,10 @@
 //#define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
 //#define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
 
-void DivPlatformSegaPCM::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformSegaPCM::acquire(short** buf, size_t len) {
   static int os[2];
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     // do a PCM cycle
     pcmL=0; pcmR=0;
@@ -67,8 +67,8 @@ void DivPlatformSegaPCM::acquire(short* bufL, short* bufR, size_t start, size_t
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
   }
 }
 
@@ -502,8 +502,8 @@ void DivPlatformSegaPCM::setFlags(const DivConfig& flags) {
   }
 }
 
-bool DivPlatformSegaPCM::isStereo() {
-  return true;
+int DivPlatformSegaPCM::getOutputCount() {
+  return 2;
 }
 
 int DivPlatformSegaPCM::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
diff --git a/src/engine/platform/segapcm.h b/src/engine/platform/segapcm.h
index 0c99a20c..3164e1b9 100644
--- a/src/engine/platform/segapcm.h
+++ b/src/engine/platform/segapcm.h
@@ -77,7 +77,7 @@ class DivPlatformSegaPCM: public DivDispatch {
     friend void putDispatchChan(void*,int,int);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -91,7 +91,7 @@ class DivPlatformSegaPCM: public DivDispatch {
     void notifyInsChange(int ins);
     void renderSamples(int chipID);
     void setFlags(const DivConfig& flags);
-    bool isStereo();
+    int getOutputCount();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
diff --git a/src/engine/platform/sms.cpp b/src/engine/platform/sms.cpp
index cf03b93b..cfe04d18 100644
--- a/src/engine/platform/sms.cpp
+++ b/src/engine/platform/sms.cpp
@@ -39,10 +39,10 @@ const char** DivPlatformSMS::getRegisterSheet() {
   return stereo?regCheatSheetGG:regCheatSheetSN;
 }
 
-void DivPlatformSMS::acquire_nuked(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformSMS::acquire_nuked(short** buf, size_t len) {
   int oL=0;
   int oR=0;
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (!writes.empty()) {
       QueuedWrite w=writes.front();
       if (w.addr==0) {
@@ -73,8 +73,8 @@ void DivPlatformSMS::acquire_nuked(short* bufL, short* bufR, size_t start, size_
     if (oL>32767) oL=32767;
     if (oR<-32768) oR=-32768;
     if (oR>32767) oR=32767;
-    bufL[h]=oL;
-    bufR[h]=oR;
+    buf[0][h]=oL;
+    if (stereo) buf[1][h]=oR;
     for (int i=0; i<4; i++) {
       if (isMuted[i]) {
         oscBuf[i]->data[oscBuf[i]->needle++]=0;
@@ -85,7 +85,7 @@ void DivPlatformSMS::acquire_nuked(short* bufL, short* bufR, size_t start, size_
   }
 }
 
-void DivPlatformSMS::acquire_mame(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformSMS::acquire_mame(short** buf, size_t len) {
   while (!writes.empty()) {
     QueuedWrite w=writes.front();
     if (stereo && (w.addr==1))
@@ -95,10 +95,10 @@ void DivPlatformSMS::acquire_mame(short* bufL, short* bufR, size_t start, size_t
     }
     writes.pop();
   }
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     short* outs[2]={
-      &bufL[h],
-      &bufR[h]
+      &buf[0][h],
+      stereo?(&buf[1][h]):NULL
     };
     sn->sound_stream_update(outs,1);
     for (int i=0; i<4; i++) {
@@ -111,11 +111,11 @@ void DivPlatformSMS::acquire_mame(short* bufL, short* bufR, size_t start, size_t
   }
 }
 
-void DivPlatformSMS::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformSMS::acquire(short** buf, size_t len) {
   if (nuked) {
-    acquire_nuked(bufL,bufR,start,len);
+    acquire_nuked(buf,len);
   } else {
-    acquire_mame(bufL,bufR,start,len);
+    acquire_mame(buf,len);
   }
 }
 
@@ -228,6 +228,7 @@ void DivPlatformSMS::tick(bool sysTick) {
     if (parent->song.snNoLowPeriods) {
       if (chan[3].actualNote>0x5d) chan[3].freq=0x01;
     }
+    if (chan[3].freq<0) chan[3].freq=0;
     if (snNoiseMode&2) { // take period from channel 3
       if (updateSNMode || resetPhase) {
         if (snNoiseMode&1) {
@@ -444,8 +445,8 @@ void DivPlatformSMS::reset() {
   }
 }
 
-bool DivPlatformSMS::isStereo() {
-  return stereo;
+int DivPlatformSMS::getOutputCount() {
+  return stereo?2:1;
 }
 
 bool DivPlatformSMS::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/sms.h b/src/engine/platform/sms.h
index 7bb3b1b1..cd0a7a1f 100644
--- a/src/engine/platform/sms.h
+++ b/src/engine/platform/sms.h
@@ -66,10 +66,10 @@ class DivPlatformSMS: public DivDispatch {
   double NOTE_SN(int ch, int note);
   int snCalcFreq(int ch);
 
-  void acquire_nuked(short* bufL, short* bufR, size_t start, size_t len);
-  void acquire_mame(short* bufL, short* bufR, size_t start, size_t len);
+  void acquire_nuked(short** buf, size_t len);
+  void acquire_mame(short** buf, size_t len);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -78,7 +78,7 @@ class DivPlatformSMS: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     bool keyOffAffectsPorta(int ch);
     int getPortaFloor(int ch);
diff --git a/src/engine/platform/snes.cpp b/src/engine/platform/snes.cpp
index 053ac9b7..6fb942d4 100644
--- a/src/engine/platform/snes.cpp
+++ b/src/engine/platform/snes.cpp
@@ -65,10 +65,10 @@ const char** DivPlatformSNES::getRegisterSheet() {
   return regCheatSheetSNESDSP;
 }
 
-void DivPlatformSNES::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformSNES::acquire(short** buf, size_t len) {
   short out[2];
   short chOut[16];
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (--delay<=0) {
       delay=0;
       if (!writes.empty()) {
@@ -82,8 +82,8 @@ void DivPlatformSNES::acquire(short* bufL, short* bufR, size_t start, size_t len
     dsp.set_output(out,1);
     dsp.run(32);
     dsp.get_voice_outputs(chOut);
-    bufL[h]=out[0];
-    bufR[h]=out[1];
+    buf[0][h]=out[0];
+    buf[1][h]=out[1];
     for (int i=0; i<8; i++) {
       int next=(3*(chOut[i*2]+chOut[i*2+1]))>>2;
       if (next<-32768) next=-32768;
@@ -768,8 +768,8 @@ void DivPlatformSNES::reset() {
   initEcho();
 }
 
-bool DivPlatformSNES::isStereo() {
-  return true;
+int DivPlatformSNES::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformSNES::notifyInsChange(int ins) {
diff --git a/src/engine/platform/snes.h b/src/engine/platform/snes.h
index 8d5e2531..884c7d80 100644
--- a/src/engine/platform/snes.h
+++ b/src/engine/platform/snes.h
@@ -93,7 +93,7 @@ class DivPlatformSNES: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -104,7 +104,7 @@ class DivPlatformSNES: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/su.cpp b/src/engine/platform/su.cpp
index 1508c684..51b04e0e 100644
--- a/src/engine/platform/su.cpp
+++ b/src/engine/platform/su.cpp
@@ -40,14 +40,14 @@ double DivPlatformSoundUnit::NOTE_SU(int ch, int note) {
   return NOTE_FREQUENCY(note);
 }
 
-void DivPlatformSoundUnit::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformSoundUnit::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     while (!writes.empty()) {
       QueuedWrite w=writes.front();
       su->Write(w.addr,w.val);
       writes.pop();
     }
-    su->NextSample(&bufL[h],&bufR[h]);
+    su->NextSample(&buf[0][h],&buf[1][h]);
     for (int i=0; i<8; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=su->GetSample(i);
     }
@@ -499,8 +499,8 @@ void DivPlatformSoundUnit::reset() {
   rWrite(0xbd,fil1);
 }
 
-bool DivPlatformSoundUnit::isStereo() {
-  return true;
+int DivPlatformSoundUnit::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformSoundUnit::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/su.h b/src/engine/platform/su.h
index ebaa911b..518edafa 100644
--- a/src/engine/platform/su.h
+++ b/src/engine/platform/su.h
@@ -98,7 +98,7 @@ class DivPlatformSoundUnit: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -109,7 +109,7 @@ class DivPlatformSoundUnit: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/swan.cpp b/src/engine/platform/swan.cpp
index f10a4e4e..f5a2dfb9 100644
--- a/src/engine/platform/swan.cpp
+++ b/src/engine/platform/swan.cpp
@@ -50,8 +50,8 @@ const char** DivPlatformSwan::getRegisterSheet() {
   return regCheatSheetWS;
 }
 
-void DivPlatformSwan::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformSwan::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     // PCM part
     if (pcm && dacSample!=-1) {
       dacPeriod+=dacRate;
@@ -83,8 +83,8 @@ void DivPlatformSwan::acquire(short* bufL, short* bufR, size_t start, size_t len
     int16_t samp[2]{0, 0};
     ws->SoundUpdate(16);
     ws->SoundFlush(samp, 1);
-    bufL[h]=samp[0];
-    bufR[h]=samp[1];
+    buf[0][h]=samp[0];
+    buf[1][h]=samp[1];
     for (int i=0; i<4; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=(ws->sample_cache[i][0]+ws->sample_cache[i][1])<<6;
     }
@@ -490,8 +490,8 @@ void DivPlatformSwan::reset() {
   rWrite(0x11,0x09); // enable speakers
 }
 
-bool DivPlatformSwan::isStereo() {
-  return true;
+int DivPlatformSwan::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformSwan::notifyWaveChange(int wave) {
diff --git a/src/engine/platform/swan.h b/src/engine/platform/swan.h
index b93f0859..6f129e6d 100644
--- a/src/engine/platform/swan.h
+++ b/src/engine/platform/swan.h
@@ -56,7 +56,7 @@ class DivPlatformSwan: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -69,7 +69,7 @@ class DivPlatformSwan: public DivDispatch {
     void muteChannel(int ch, bool mute);
     void notifyWaveChange(int wave);
     void notifyInsDeletion(void* ins);
-    bool isStereo();
+    int getOutputCount();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
diff --git a/src/engine/platform/t6w28.cpp b/src/engine/platform/t6w28.cpp
index b318b174..4f42d076 100644
--- a/src/engine/platform/t6w28.cpp
+++ b/src/engine/platform/t6w28.cpp
@@ -35,8 +35,8 @@ const char** DivPlatformT6W28::getRegisterSheet() {
   return regCheatSheetT6W28;
 }
 
-void DivPlatformT6W28::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformT6W28::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     cycles=0;
     while (!writes.empty() && cycles<16) {
       QueuedWrite w=writes.front();
@@ -64,8 +64,8 @@ void DivPlatformT6W28::acquire(short* bufL, short* bufR, size_t start, size_t le
     if (tempR<-32768) tempR=-32768;
     if (tempR>32767) tempR=32767;
     
-    bufL[h]=tempL;
-    bufR[h]=tempR;
+    buf[0][h]=tempL;
+    buf[1][h]=tempR;
   }
 }
 
@@ -146,6 +146,7 @@ void DivPlatformT6W28::tick(bool sysTick) {
     }
     if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
       chan[i].freq=snCalcFreq(i);
+      if (chan[i].freq<0) chan[i].freq=0;
       if (chan[i].freq>1023) chan[i].freq=1023;
       if (i==3) {
         rWrite(1,0x80|(2<<5)|(chan[3].freq&15));
@@ -335,8 +336,8 @@ void DivPlatformT6W28::reset() {
   rWrite(1,0xe7);
 }
 
-bool DivPlatformT6W28::isStereo() {
-  return true;
+int DivPlatformT6W28::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformT6W28::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/t6w28.h b/src/engine/platform/t6w28.h
index c526fd5d..dd49d1b8 100644
--- a/src/engine/platform/t6w28.h
+++ b/src/engine/platform/t6w28.h
@@ -59,7 +59,7 @@ class DivPlatformT6W28: public DivDispatch {
   
   void writeOutVol(int ch);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -70,7 +70,7 @@ class DivPlatformT6W28: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/tia.cpp b/src/engine/platform/tia.cpp
index 9517204e..02f42201 100644
--- a/src/engine/platform/tia.cpp
+++ b/src/engine/platform/tia.cpp
@@ -38,16 +38,16 @@ const char** DivPlatformTIA::getRegisterSheet() {
   return regCheatSheetTIA;
 }
 
-void DivPlatformTIA::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformTIA::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     tia.tick();
     if (mixingType==2) {
-      bufL[h]=tia.myCurrentSample[0];
-      bufR[h]=tia.myCurrentSample[1];
+      buf[0][h]=tia.myCurrentSample[0];
+      buf[1][h]=tia.myCurrentSample[1];
     } else if (mixingType==1) {
-      bufL[h]=(tia.myCurrentSample[0]+tia.myCurrentSample[1])>>1;
+      buf[0][h]=(tia.myCurrentSample[0]+tia.myCurrentSample[1])>>1;
     } else {
-      bufL[h]=tia.myCurrentSample[0];
+      buf[0][h]=tia.myCurrentSample[0];
     }
     if (++chanOscCounter>=114) {
       chanOscCounter=0;
@@ -342,8 +342,8 @@ float DivPlatformTIA::getPostAmp() {
   return 0.5f;
 }
 
-bool DivPlatformTIA::isStereo() {
-  return (mixingType==2);
+int DivPlatformTIA::getOutputCount() {
+  return (mixingType==2)?2:1;
 }
 
 bool DivPlatformTIA::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/tia.h b/src/engine/platform/tia.h
index d60d4165..b4b867dc 100644
--- a/src/engine/platform/tia.h
+++ b/src/engine/platform/tia.h
@@ -45,7 +45,7 @@ class DivPlatformTIA: public DivDispatch {
     unsigned char dealWithFreq(unsigned char shape, int base, int pitch);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -58,7 +58,7 @@ class DivPlatformTIA: public DivDispatch {
     void muteChannel(int ch, bool mute);
     void setFlags(const DivConfig& flags);
     float getPostAmp();
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
diff --git a/src/engine/platform/tx81z.cpp b/src/engine/platform/tx81z.cpp
index 88266114..c3f64741 100644
--- a/src/engine/platform/tx81z.cpp
+++ b/src/engine/platform/tx81z.cpp
@@ -55,12 +55,12 @@ const char** DivPlatformTX81Z::getRegisterSheet() {
   return regCheatSheetOPZ;
 }
 
-void DivPlatformTX81Z::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformTX81Z::acquire(short** buf, size_t len) {
   static int os[2];
 
   ymfm::ym2414::fm_engine* fme=fm_ymfm->debug_engine();
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     if (!writes.empty()) {
       if (--delay<1) {
@@ -87,8 +87,8 @@ void DivPlatformTX81Z::acquire(short* bufL, short* bufR, size_t start, size_t le
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
   }
 }
 
@@ -947,8 +947,8 @@ void DivPlatformTX81Z::setFlags(const DivConfig& flags) {
   }
 }
 
-bool DivPlatformTX81Z::isStereo() {
-  return true;
+int DivPlatformTX81Z::getOutputCount() {
+  return 2;
 }
 
 int DivPlatformTX81Z::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
diff --git a/src/engine/platform/tx81z.h b/src/engine/platform/tx81z.h
index b180f28c..4dea61e7 100644
--- a/src/engine/platform/tx81z.h
+++ b/src/engine/platform/tx81z.h
@@ -60,7 +60,7 @@ class DivPlatformTX81Z: public DivPlatformOPM {
 
     friend void putDispatchChip(void*,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -73,7 +73,7 @@ class DivPlatformTX81Z: public DivPlatformOPM {
     void muteChannel(int ch, bool mute);
     void notifyInsChange(int ins);
     void setFlags(const DivConfig& flags);
-    bool isStereo();
+    int getOutputCount();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
diff --git a/src/engine/platform/vb.cpp b/src/engine/platform/vb.cpp
index 5d79e508..374aebaa 100644
--- a/src/engine/platform/vb.cpp
+++ b/src/engine/platform/vb.cpp
@@ -93,8 +93,8 @@ const char** DivPlatformVB::getRegisterSheet() {
   return regCheatSheetVB;
 }
 
-void DivPlatformVB::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformVB::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     cycles=0;
     while (!writes.empty()) {
       QueuedWrite w=writes.front();
@@ -117,8 +117,8 @@ void DivPlatformVB::acquire(short* bufL, short* bufR, size_t start, size_t len)
     if (tempR<-32768) tempR=-32768;
     if (tempR>32767) tempR=32767;
     
-    bufL[h]=tempL;
-    bufR[h]=tempR;
+    buf[0][h]=tempL;
+    buf[1][h]=tempR;
   }
 }
 
@@ -465,8 +465,8 @@ void DivPlatformVB::reset() {
   delay=500;
 }
 
-bool DivPlatformVB::isStereo() {
-  return true;
+int DivPlatformVB::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformVB::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/vb.h b/src/engine/platform/vb.h
index bcce42fe..7475c745 100644
--- a/src/engine/platform/vb.h
+++ b/src/engine/platform/vb.h
@@ -64,7 +64,7 @@ class DivPlatformVB: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -76,7 +76,7 @@ class DivPlatformVB: public DivDispatch {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     float getPostAmp();
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/vera.cpp b/src/engine/platform/vera.cpp
index 5021ac85..ba9f95fe 100644
--- a/src/engine/platform/vera.cpp
+++ b/src/engine/platform/vera.cpp
@@ -53,11 +53,11 @@ const char** DivPlatformVERA::getRegisterSheet() {
   return regCheatSheetVERA;
 }
 
-void DivPlatformVERA::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformVERA::acquire(short** buf, size_t len) {
   // both PSG part and PCM part output a full 16-bit range, putting bufL/R
   // argument right into both could cause an overflow
-  short buf[4][128];
-  size_t pos=start;
+  short whyCallItBuf[4][128];
+  size_t pos=0;
   DivSample* s=parent->getSample(chan[16].pcm.sample);
   while (len>0) {
     if (s->samples>0) {
@@ -98,18 +98,18 @@ void DivPlatformVERA::acquire(short* bufL, short* bufR, size_t start, size_t len
       chan[16].pcm.sample=-1;
     }
     int curLen=MIN(len,128);
-    memset(buf,0,sizeof(buf));
-    pcm_render(pcm,buf[2],buf[3],curLen);
+    memset(whyCallItBuf,0,sizeof(whyCallItBuf));
+    pcm_render(pcm,whyCallItBuf[2],whyCallItBuf[3],curLen);
     for (int i=0; i<curLen; i++) {
-      psg_render(psg,&buf[0][i],&buf[1][i],1);
-      bufL[pos]=(short)(((int)buf[0][i]+buf[2][i])/2);
-      bufR[pos]=(short)(((int)buf[1][i]+buf[3][i])/2);
+      psg_render(psg,&whyCallItBuf[0][i],&whyCallItBuf[1][i],1);
+      buf[0][pos]=(short)(((int)whyCallItBuf[0][i]+whyCallItBuf[2][i])/2);
+      buf[1][pos]=(short)(((int)whyCallItBuf[1][i]+whyCallItBuf[3][i])/2);
       pos++;
 
       for (int i=0; i<16; i++) {
         oscBuf[i]->data[oscBuf[i]->needle++]=psg->channels[i].lastOut<<4;
       }
-      int pcmOut=buf[2][i]+buf[3][i];
+      int pcmOut=whyCallItBuf[2][i]+whyCallItBuf[3][i];
       if (pcmOut<-32768) pcmOut=-32768;
       if (pcmOut>32767) pcmOut=32767;
       oscBuf[16]->data[oscBuf[16]->needle++]=pcmOut;
@@ -406,8 +406,8 @@ float DivPlatformVERA::getPostAmp() {
   return 4.0f;
 }
 
-bool DivPlatformVERA::isStereo() {
-  return true;
+int DivPlatformVERA::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformVERA::notifyInsDeletion(void* ins) {
diff --git a/src/engine/platform/vera.h b/src/engine/platform/vera.h
index 57be5dc9..762a32c8 100644
--- a/src/engine/platform/vera.h
+++ b/src/engine/platform/vera.h
@@ -60,7 +60,7 @@ class DivPlatformVERA: public DivDispatch {
     friend void putDispatchChan(void*,int,int);
   
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -72,7 +72,7 @@ class DivPlatformVERA: public DivDispatch {
     void muteChannel(int ch, bool mute);
     void notifyInsDeletion(void* ins);
     float getPostAmp();
-    bool isStereo();
+    int getOutputCount();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
diff --git a/src/engine/platform/vic20.cpp b/src/engine/platform/vic20.cpp
index 3e8046d2..3a4e2572 100644
--- a/src/engine/platform/vic20.cpp
+++ b/src/engine/platform/vic20.cpp
@@ -39,13 +39,13 @@ const char** DivPlatformVIC20::getRegisterSheet() {
   return regCheatSheetVIC;
 }
 
-void DivPlatformVIC20::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformVIC20::acquire(short** buf, size_t len) {
   const unsigned char loadFreq[3] = {0x7e, 0x7d, 0x7b};
   const unsigned char wavePatterns[16] = {
     0b0,     0b10,    0b100,   0b110,   0b1000,  0b1010,   0b1011,   0b1110,
     0b10010, 0b10100, 0b10110, 0b11000, 0b11010, 0b100100, 0b101010, 0b101100
   };
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     if (hasWaveWrite) {
       hasWaveWrite=false;
       for (int i=0; i<3; i++) {
@@ -66,8 +66,7 @@ void DivPlatformVIC20::acquire(short* bufL, short* bufR, size_t start, size_t le
     }
     short samp;
     vic_sound_machine_calculate_samples(vic,&samp,1,1,0,SAMP_DIVIDER);
-    bufL[h]=samp;
-    bufR[h]=samp;
+    buf[0][h]=samp;
     for (int i=0; i<4; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=vic->ch[i].out?(vic->volume<<11):0;
     }
@@ -299,8 +298,8 @@ void DivPlatformVIC20::reset() {
   vic_sound_clock(vic,4);
 }
 
-bool DivPlatformVIC20::isStereo() {
-  return false;
+int DivPlatformVIC20::getOutputCount() {
+  return 1;
 }
 
 void DivPlatformVIC20::notifyInsDeletion(void* ins) {
diff --git a/src/engine/platform/vic20.h b/src/engine/platform/vic20.h
index a2628872..3fc9fade 100644
--- a/src/engine/platform/vic20.h
+++ b/src/engine/platform/vic20.h
@@ -43,7 +43,7 @@ class DivPlatformVIC20: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -56,7 +56,7 @@ class DivPlatformVIC20: public DivDispatch {
     void muteChannel(int ch, bool mute);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
-    bool isStereo();
+    int getOutputCount();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
diff --git a/src/engine/platform/vrc6.cpp b/src/engine/platform/vrc6.cpp
index bb1a7a42..9b4c49f0 100644
--- a/src/engine/platform/vrc6.cpp
+++ b/src/engine/platform/vrc6.cpp
@@ -46,8 +46,8 @@ const char** DivPlatformVRC6::getRegisterSheet() {
   return regCheatSheetVRC6;
 }
 
-void DivPlatformVRC6::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t i=start; i<start+len; i++) {
+void DivPlatformVRC6::acquire(short** buf, size_t len) {
+  for (size_t i=0; i<len; i++) {
     // PCM part
     for (int i=0; i<2; i++) {
       if (chan[i].pcm && chan[i].dacSample!=-1) {
@@ -81,7 +81,7 @@ void DivPlatformVRC6::acquire(short* bufL, short* bufR, size_t start, size_t len
     int sample=vrc6.out()<<9; // scale to 16 bit
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
-    bufL[i]=bufR[i]=sample;
+    buf[0][i]=buf[1][i]=sample;
 
     // Oscilloscope buffer part
     if (++writeOscBuf>=32) {
diff --git a/src/engine/platform/vrc6.h b/src/engine/platform/vrc6.h
index 3cb02c41..5facd13a 100644
--- a/src/engine/platform/vrc6.h
+++ b/src/engine/platform/vrc6.h
@@ -61,7 +61,7 @@ class DivPlatformVRC6: public DivDispatch, public vrcvi_intf {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/platform/x1_010.cpp b/src/engine/platform/x1_010.cpp
index 093b952c..34973a99 100644
--- a/src/engine/platform/x1_010.cpp
+++ b/src/engine/platform/x1_010.cpp
@@ -205,8 +205,8 @@ const char** DivPlatformX1_010::getRegisterSheet() {
   return regCheatSheetX1_010;
 }
 
-void DivPlatformX1_010::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  for (size_t h=start; h<start+len; h++) {
+void DivPlatformX1_010::acquire(short** buf, size_t len) {
+  for (size_t h=0; h<len; h++) {
     x1_010.tick();
 
     signed int tempL=x1_010.output(0);
@@ -218,8 +218,8 @@ void DivPlatformX1_010::acquire(short* bufL, short* bufR, size_t start, size_t l
     if (tempR>32767) tempR=32767;
 
     //printf("tempL: %d tempR: %d\n",tempL,tempR);
-    bufL[h]=stereo?tempL:((tempL+tempR)>>1);
-    bufR[h]=stereo?tempR:bufL[h];
+    buf[0][h]=stereo?tempL:((tempL+tempR)>>1);
+    if (stereo) buf[1][h]=tempR;
 
     for (int i=0; i<16; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=(x1_010.voice_out(i,0)+x1_010.voice_out(i,1))>>1;
@@ -894,8 +894,8 @@ void DivPlatformX1_010::reset() {
   }
 }
 
-bool DivPlatformX1_010::isStereo() {
-  return stereo;
+int DivPlatformX1_010::getOutputCount() {
+  return stereo?2:1;
 }
 
 bool DivPlatformX1_010::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/x1_010.h b/src/engine/platform/x1_010.h
index 28b180eb..eaa4258a 100644
--- a/src/engine/platform/x1_010.h
+++ b/src/engine/platform/x1_010.h
@@ -127,7 +127,7 @@ class DivPlatformX1_010: public DivDispatch, public vgsound_emu_mem_intf {
   friend void putDispatchChan(void*,int,int);
   public:
     u8 read_byte(u32 address);
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -138,7 +138,7 @@ class DivPlatformX1_010: public DivDispatch, public vgsound_emu_mem_intf {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/ym2203.cpp b/src/engine/platform/ym2203.cpp
index 3419a1b6..493adfc3 100644
--- a/src/engine/platform/ym2203.cpp
+++ b/src/engine/platform/ym2203.cpp
@@ -156,19 +156,19 @@ const char** DivPlatformYM2203::getRegisterSheet() {
   return regCheatSheetYM2203;
 }
 
-void DivPlatformYM2203::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2203::acquire(short** buf, size_t len) {
   if (useCombo) {
-    acquire_combo(bufL,bufR,start,len);
+    acquire_combo(buf,len);
   } else {
-    acquire_ymfm(bufL,bufR,start,len);
+    acquire_ymfm(buf,len);
   }
 }
 
-void DivPlatformYM2203::acquire_combo(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2203::acquire_combo(short** buf, size_t len) {
   static int os;
   static short ignored[2];
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os=0;
     // Nuked part
     for (unsigned int i=0; i<nukedMult; i++) {
@@ -218,7 +218,7 @@ void DivPlatformYM2203::acquire_combo(short* bufL, short* bufR, size_t start, si
     if (os<-32768) os=-32768;
     if (os>32767) os=32767;
   
-    bufL[h]=os;
+    buf[0][h]=os;
     
     for (int i=0; i<3; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=fm_nuked.ch_out[i];
@@ -230,7 +230,7 @@ void DivPlatformYM2203::acquire_combo(short* bufL, short* bufR, size_t start, si
   }
 }
 
-void DivPlatformYM2203::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2203::acquire_ymfm(short** buf, size_t len) {
   static int os;
 
   ymfm::ym2203::fm_engine* fme=fm->debug_fm_engine();
@@ -240,7 +240,7 @@ void DivPlatformYM2203::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     fmChan[i]=fme->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os=0;
     if (!writes.empty()) {
       if (--delay<1) {
@@ -259,7 +259,7 @@ void DivPlatformYM2203::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     if (os<-32768) os=-32768;
     if (os>32767) os=32767;
   
-    bufL[h]=os;
+    buf[0][h]=os;
 
     
     for (int i=0; i<3; i++) {
@@ -967,8 +967,8 @@ void DivPlatformYM2203::reset() {
   ay->flushWrites();
 }
 
-bool DivPlatformYM2203::isStereo() {
-  return false;
+int DivPlatformYM2203::getOutputCount() {
+  return 1;
 }
 
 bool DivPlatformYM2203::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/ym2203.h b/src/engine/platform/ym2203.h
index 3d4670f7..2f4da5b4 100644
--- a/src/engine/platform/ym2203.h
+++ b/src/engine/platform/ym2203.h
@@ -55,11 +55,11 @@ class DivPlatformYM2203: public DivPlatformOPN {
 
     friend void putDispatchChip(void*,int);
 
-    void acquire_combo(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_combo(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -70,7 +70,7 @@ class DivPlatformYM2203: public DivPlatformOPN {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void notifyInsChange(int ins);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/ym2608.cpp b/src/engine/platform/ym2608.cpp
index fc0b08de..f23cf935 100644
--- a/src/engine/platform/ym2608.cpp
+++ b/src/engine/platform/ym2608.cpp
@@ -297,15 +297,15 @@ double DivPlatformYM2608::NOTE_ADPCMB(int note) {
   return 0;
 }
 
-void DivPlatformYM2608::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2608::acquire(short** buf, size_t len) {
   if (useCombo) {
-    acquire_combo(bufL,bufR,start,len);
+    acquire_combo(buf,len);
   } else {
-    acquire_ymfm(bufL,bufR,start,len);
+    acquire_ymfm(buf,len);
   }
 }
 
-void DivPlatformYM2608::acquire_combo(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2608::acquire_combo(short** buf, size_t len) {
   static int os[2];
   static short ignored[2];
 
@@ -320,7 +320,7 @@ void DivPlatformYM2608::acquire_combo(short* bufL, short* bufR, size_t start, si
     adpcmAChan[i]=aae->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     // Nuked part
     for (int i=0; i<nukedMult; i++) {
@@ -386,8 +386,8 @@ void DivPlatformYM2608::acquire_combo(short* bufL, short* bufR, size_t start, si
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
 
     
     for (int i=0; i<psgChanOffs; i++) {
@@ -407,7 +407,7 @@ void DivPlatformYM2608::acquire_combo(short* bufL, short* bufR, size_t start, si
   }
 }
 
-void DivPlatformYM2608::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2608::acquire_ymfm(short** buf, size_t len) {
   static int os[2];
 
   ymfm::ym2608::fm_engine* fme=fm->debug_fm_engine();
@@ -424,7 +424,7 @@ void DivPlatformYM2608::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     adpcmAChan[i]=aae->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     if (!writes.empty()) {
       if (--delay<1) {
@@ -447,8 +447,8 @@ void DivPlatformYM2608::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
 
     for (int i=0; i<6; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=(fmChan[i]->debug_output(0)+fmChan[i]->debug_output(1));
@@ -1424,8 +1424,8 @@ void DivPlatformYM2608::reset() {
   ay->flushWrites();
 }
 
-bool DivPlatformYM2608::isStereo() {
-  return true;
+int DivPlatformYM2608::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformYM2608::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/ym2608.h b/src/engine/platform/ym2608.h
index 4e6c59b9..3953e6f6 100644
--- a/src/engine/platform/ym2608.h
+++ b/src/engine/platform/ym2608.h
@@ -70,11 +70,11 @@ class DivPlatformYM2608: public DivPlatformOPN {
 
     friend void putDispatchChip(void*,int);
 
-    void acquire_combo(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_combo(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -85,7 +85,7 @@ class DivPlatformYM2608: public DivPlatformOPN {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void notifyInsChange(int ins);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/ym2610.cpp b/src/engine/platform/ym2610.cpp
index 261163e5..605d767f 100644
--- a/src/engine/platform/ym2610.cpp
+++ b/src/engine/platform/ym2610.cpp
@@ -232,15 +232,15 @@ const char** DivPlatformYM2610::getRegisterSheet() {
   return regCheatSheetYM2610;
 }
 
-void DivPlatformYM2610::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2610::acquire(short** buf, size_t len) {
   if (useCombo) {
-    acquire_combo(bufL,bufR,start,len);
+    acquire_combo(buf,len);
   } else {
-    acquire_ymfm(bufL,bufR,start,len);
+    acquire_ymfm(buf,len);
   }
 }
 
-void DivPlatformYM2610::acquire_combo(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2610::acquire_combo(short** buf, size_t len) {
   static int os[2];
   static short ignored[2];
 
@@ -255,7 +255,7 @@ void DivPlatformYM2610::acquire_combo(short* bufL, short* bufR, size_t start, si
     adpcmAChan[i]=aae->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     // Nuked part
     for (int i=0; i<24; i++) {
@@ -317,8 +317,8 @@ void DivPlatformYM2610::acquire_combo(short* bufL, short* bufR, size_t start, si
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
 
     
     for (int i=0; i<psgChanOffs; i++) {
@@ -338,7 +338,7 @@ void DivPlatformYM2610::acquire_combo(short* bufL, short* bufR, size_t start, si
   }
 }
 
-void DivPlatformYM2610::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2610::acquire_ymfm(short** buf, size_t len) {
   static int os[2];
 
   ymfm::ym2610::fm_engine* fme=fm->debug_fm_engine();
@@ -357,7 +357,7 @@ void DivPlatformYM2610::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     adpcmAChan[i]=aae->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     if (!writes.empty()) {
       if (--delay<1 && !(fm->read(0)&0x80)) {
@@ -380,8 +380,8 @@ void DivPlatformYM2610::acquire_ymfm(short* bufL, short* bufR, size_t start, siz
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
 
     for (int i=0; i<psgChanOffs; i++) {
       oscBuf[i]->data[oscBuf[i]->needle++]=(fmChan[i]->debug_output(0)+fmChan[i]->debug_output(1));
@@ -1372,8 +1372,8 @@ void DivPlatformYM2610::reset() {
   immWrite(0x1b,0xff); // B
 }
 
-bool DivPlatformYM2610::isStereo() {
-  return true;
+int DivPlatformYM2610::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformYM2610::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/ym2610.h b/src/engine/platform/ym2610.h
index f2ffb9c7..a3bf53b4 100644
--- a/src/engine/platform/ym2610.h
+++ b/src/engine/platform/ym2610.h
@@ -38,11 +38,11 @@ class DivPlatformYM2610: public DivPlatformYM2610Base {
 
     friend void putDispatchChip(void*,int);
 
-    void acquire_combo(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_combo(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
     
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -53,7 +53,7 @@ class DivPlatformYM2610: public DivPlatformYM2610Base {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void notifyInsChange(int ins);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/ym2610b.cpp b/src/engine/platform/ym2610b.cpp
index e1b856f9..0586d5b7 100644
--- a/src/engine/platform/ym2610b.cpp
+++ b/src/engine/platform/ym2610b.cpp
@@ -296,15 +296,15 @@ const char** DivPlatformYM2610B::getRegisterSheet() {
   return regCheatSheetYM2610B;
 }
 
-void DivPlatformYM2610B::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2610B::acquire(short** buf, size_t len) {
   if (useCombo) {
-    acquire_combo(bufL,bufR,start,len);
+    acquire_combo(buf,len);
   } else {
-    acquire_ymfm(bufL,bufR,start,len);
+    acquire_ymfm(buf,len);
   }
 }
 
-void DivPlatformYM2610B::acquire_combo(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2610B::acquire_combo(short** buf, size_t len) {
   static int os[2];
   static short ignored[2];
 
@@ -319,7 +319,7 @@ void DivPlatformYM2610B::acquire_combo(short* bufL, short* bufR, size_t start, s
     adpcmAChan[i]=aae->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     // Nuked part
     for (int i=0; i<24; i++) {
@@ -385,8 +385,8 @@ void DivPlatformYM2610B::acquire_combo(short* bufL, short* bufR, size_t start, s
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
 
     
     for (int i=0; i<psgChanOffs; i++) {
@@ -406,7 +406,7 @@ void DivPlatformYM2610B::acquire_combo(short* bufL, short* bufR, size_t start, s
   }
 }
 
-void DivPlatformYM2610B::acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformYM2610B::acquire_ymfm(short** buf, size_t len) {
   static int os[2];
 
   ymfm::ym2610b::fm_engine* fme=fm->debug_fm_engine();
@@ -423,7 +423,7 @@ void DivPlatformYM2610B::acquire_ymfm(short* bufL, short* bufR, size_t start, si
     adpcmAChan[i]=aae->debug_channel(i);
   }
 
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     os[0]=0; os[1]=0;
     if (!writes.empty()) {
       if (--delay<1 && !(fm->read(0)&0x80)) {
@@ -446,8 +446,8 @@ void DivPlatformYM2610B::acquire_ymfm(short* bufL, short* bufR, size_t start, si
     if (os[1]<-32768) os[1]=-32768;
     if (os[1]>32767) os[1]=32767;
   
-    bufL[h]=os[0];
-    bufR[h]=os[1];
+    buf[0][h]=os[0];
+    buf[1][h]=os[1];
 
     
     for (int i=0; i<psgChanOffs; i++) {
@@ -1443,8 +1443,8 @@ void DivPlatformYM2610B::reset() {
   ay->flushWrites();
 }
 
-bool DivPlatformYM2610B::isStereo() {
-  return true;
+int DivPlatformYM2610B::getOutputCount() {
+  return 2;
 }
 
 bool DivPlatformYM2610B::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/ym2610b.h b/src/engine/platform/ym2610b.h
index 6052a535..ca2cb333 100644
--- a/src/engine/platform/ym2610b.h
+++ b/src/engine/platform/ym2610b.h
@@ -34,11 +34,11 @@ class DivPlatformYM2610B: public DivPlatformYM2610Base {
 
     friend void putDispatchChip(void*,int);
 
-    void acquire_combo(short* bufL, short* bufR, size_t start, size_t len);
-    void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire_combo(short** buf, size_t len);
+    void acquire_ymfm(short** buf, size_t len);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -49,7 +49,7 @@ class DivPlatformYM2610B: public DivPlatformYM2610Base {
     void forceIns();
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
-    bool isStereo();
+    int getOutputCount();
     bool keyOffAffectsArp(int ch);
     void notifyInsChange(int ins);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/ym2610shared.h b/src/engine/platform/ym2610shared.h
index ab1bd052..51718699 100644
--- a/src/engine/platform/ym2610shared.h
+++ b/src/engine/platform/ym2610shared.h
@@ -119,8 +119,8 @@ class DivPlatformYM2610Base: public DivPlatformOPN {
       }
     }
 
-    bool isStereo() {
-      return true;
+    int getOutputCount() {
+      return 2;
     }
 
     const void* getSampleMem(int index) {
diff --git a/src/engine/platform/ymz280b.cpp b/src/engine/platform/ymz280b.cpp
index 7c7c5686..a5fdf10b 100644
--- a/src/engine/platform/ymz280b.cpp
+++ b/src/engine/platform/ymz280b.cpp
@@ -60,13 +60,13 @@ const char** DivPlatformYMZ280B::getRegisterSheet() {
   return regCheatSheetYMZ280B;
 }
 
-void DivPlatformYMZ280B::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  short buf[16][256];
+void DivPlatformYMZ280B::acquire(short** buf, size_t len) {
+  short why[16][256];
   short *bufPtrs[16]={
-    buf[0],buf[1],buf[2],buf[3],buf[4],buf[5],buf[6],buf[7],
-    buf[8],buf[9],buf[10],buf[11],buf[12],buf[13],buf[14],buf[15]
+    why[0],why[1],why[2],why[3],why[4],why[5],why[6],why[7],
+    why[8],why[9],why[10],why[11],why[12],why[13],why[14],why[15]
   };
-  size_t pos=start;
+  size_t pos=0;
   while (len > 0) {
     size_t blockLen = MIN(len, 256);
     ymz280b.sound_stream_update(bufPtrs, blockLen);
@@ -74,12 +74,12 @@ void DivPlatformYMZ280B::acquire(short* bufL, short* bufR, size_t start, size_t
       int dataL=0;
       int dataR=0;
       for (int j=0; j<8; j++) {
-        dataL+=buf[j*2][i];
-        dataR+=buf[j*2+1][i];
-        oscBuf[j]->data[oscBuf[j]->needle++]=(short)(((int)buf[j*2][i]+buf[j*2+1][i])/2);
+        dataL+=why[j*2][i];
+        dataR+=why[j*2+1][i];
+        oscBuf[j]->data[oscBuf[j]->needle++]=(short)(((int)why[j*2][i]+why[j*2+1][i])/2);
       }
-      bufL[pos]=(short)(dataL/8);
-      bufR[pos]=(short)(dataR/8);
+      buf[0][pos]=(short)(dataL/8);
+      buf[1][pos]=(short)(dataR/8);
       pos++;
     }
     len-=blockLen;
@@ -372,8 +372,8 @@ void DivPlatformYMZ280B::reset() {
   }
 }
 
-bool DivPlatformYMZ280B::isStereo() {
-  return true;
+int DivPlatformYMZ280B::getOutputCount() {
+  return 2;
 }
 
 void DivPlatformYMZ280B::notifyInsChange(int ins) {
diff --git a/src/engine/platform/ymz280b.h b/src/engine/platform/ymz280b.h
index 810d5223..78ea544b 100644
--- a/src/engine/platform/ymz280b.h
+++ b/src/engine/platform/ymz280b.h
@@ -56,7 +56,7 @@ class DivPlatformYMZ280B: public DivDispatch {
   friend void putDispatchChan(void*,int,int);
 
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
@@ -68,7 +68,7 @@ class DivPlatformYMZ280B: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     float getPostAmp();
-    bool isStereo();
+    int getOutputCount();
     void setChipModel(int type);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/zxbeeper.cpp b/src/engine/platform/zxbeeper.cpp
index 90ddfe2c..7bd992f8 100644
--- a/src/engine/platform/zxbeeper.cpp
+++ b/src/engine/platform/zxbeeper.cpp
@@ -27,9 +27,9 @@ const char** DivPlatformZXBeeper::getRegisterSheet() {
   return NULL;
 }
 
-void DivPlatformZXBeeper::acquire(short* bufL, short* bufR, size_t start, size_t len) {
+void DivPlatformZXBeeper::acquire(short** buf, size_t len) {
   bool o=false;
-  for (size_t h=start; h<start+len; h++) {
+  for (size_t h=0; h<len; h++) {
     // clock here
     if (curSample>=0 && curSample<parent->song.sampleLen) {
       if (--curSamplePeriod<0) {
@@ -46,7 +46,7 @@ void DivPlatformZXBeeper::acquire(short* bufL, short* bufR, size_t start, size_t
         }
       }
       o=sampleOut;
-      bufL[h]=o?16384:0;
+      buf[0][h]=o?16384:0;
       oscBuf[0]->data[oscBuf[0]->needle++]=o?16384:-16384;
       continue;
     }
@@ -64,7 +64,7 @@ void DivPlatformZXBeeper::acquire(short* bufL, short* bufR, size_t start, size_t
     }
     if (++curChan>=6) curChan=0;
     
-    bufL[h]=o?16384:0;
+    buf[0][h]=o?16384:0;
     oscBuf[0]->data[oscBuf[0]->needle++]=o?16384:-16384;
   }
 }
diff --git a/src/engine/platform/zxbeeper.h b/src/engine/platform/zxbeeper.h
index 19c3e6ed..a9b3594c 100644
--- a/src/engine/platform/zxbeeper.h
+++ b/src/engine/platform/zxbeeper.h
@@ -52,7 +52,7 @@ class DivPlatformZXBeeper: public DivDispatch {
   friend void putDispatchChip(void*,int);
   friend void putDispatchChan(void*,int,int);
   public:
-    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    void acquire(short** buf, size_t len);
     int dispatch(DivCommand c);
     void* getChanState(int chan);
     DivMacroInt* getChanMacroInt(int ch);
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index e0f9e99a..b80ff140 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -225,6 +225,8 @@ const char* cmdName[]={
   "ES5506_ENVELOPE_K2RAMP",
   "ES5506_PAUSE",
 
+  "SURROUND_PANNING",
+
   "ALWAYS_SET_VOLUME"
 };
 
@@ -567,6 +569,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
   short lastSlide=-1;
   bool calledPorta=false;
   bool panChanged=false;
+  bool surroundPanChanged=false;
 
   // effects
   for (int j=0; j<curPat[i].effectCols; j++) {
@@ -597,6 +600,19 @@ void DivEngine::processRow(int i, bool afterDelay) {
         chan[i].panR=effectVal;
         panChanged=true;
         break;
+      case 0x88: // panning rear (split 4-bit)
+        chan[i].panRL=(effectVal>>4)|(effectVal&0xf0);
+        chan[i].panRR=(effectVal&15)|((effectVal&15)<<4);
+        surroundPanChanged=true;
+        break;
+      case 0x89: // panning left (split 8-bit)
+        chan[i].panRL=effectVal;
+        surroundPanChanged=true;
+        break;
+      case 0x8a: // panning right (split 8-bit)
+        chan[i].panRR=effectVal;
+        surroundPanChanged=true;
+        break;
       case 0x01: // ramp up
         if (song.ignoreDuplicateSlides && (lastSlide==0x01 || lastSlide==0x1337)) break;
         lastSlide=0x01;
@@ -878,6 +894,10 @@ void DivEngine::processRow(int i, bool afterDelay) {
   if (panChanged) {
     dispatchCmd(DivCommand(DIV_CMD_PANNING,i,chan[i].panL,chan[i].panR));
   }
+  if (surroundPanChanged) {
+    dispatchCmd(DivCommand(DIV_CMD_SURROUND_PANNING,i,2,chan[i].panRL));
+    dispatchCmd(DivCommand(DIV_CMD_SURROUND_PANNING,i,3,chan[i].panRR));
+  }
 
   if (insChanged && (chan[i].inPorta || calledPorta) && song.newInsTriggersInPorta) {
     dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,DIV_NOTE_NULL));
@@ -1371,12 +1391,17 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
   return ret;
 }
 
+int DivEngine::getBufferPos() {
+  return bufferPos>>MASTER_CLOCK_PREC;
+}
+
 void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsigned int size) {
   lastLoopPos=-1;
 
   if (out!=NULL) {
-    memset(out[0],0,size*sizeof(float));
-    memset(out[1],0,size*sizeof(float));
+    for (int i=0; i<outChans; i++) {
+      memset(out[i],0,size*sizeof(float));
+    }
   }
 
   if (softLocked) {
@@ -1440,7 +1465,7 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
   }
   
   // process audio
-  if (out!=NULL && ((sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) || (sPreview.wave>=0 && sPreview.wave<(int)song.wave.size()))) {
+  if ((sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) || (sPreview.wave>=0 && sPreview.wave<(int)song.wave.size())) {
     unsigned int samp_bbOff=0;
     unsigned int prevAvail=blip_samples_avail(samp_bb);
     if (prevAvail>size) prevAvail=size;
@@ -1576,191 +1601,232 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
 
     blip_end_frame(samp_bb,prevtotal);
     blip_read_samples(samp_bb,samp_bbOut+samp_bbOff,size-samp_bbOff,0);
-    for (size_t i=0; i<size; i++) {
-      out[0][i]+=(float)samp_bbOut[i]/32768.0;
-      out[1][i]+=(float)samp_bbOut[i]/32768.0;
-    }
+  } else {
+    memset(samp_bbOut,0,size*sizeof(short));
   }
 
-  if (!playing) {
-    if (out!=NULL) {
-      for (unsigned int i=0; i<size; i++) {
-        oscBuf[0][oscWritePos]=out[0][i];
-        oscBuf[1][oscWritePos]=out[1][i];
-        if (++oscWritePos>=32768) oscWritePos=0;
+  if (playing && !halted) {
+    // logic starts here
+    for (int i=0; i<song.systemLen; i++) {
+      // TODO: we may have a problem here
+      disCont[i].lastAvail=blip_samples_avail(disCont[i].bb[0]);
+      if (disCont[i].lastAvail>0) {
+        disCont[i].flush(disCont[i].lastAvail);
       }
-      oscSize=size;
+      if (size<disCont[i].lastAvail) {
+        disCont[i].runtotal=0;
+      } else {
+        disCont[i].runtotal=blip_clocks_needed(disCont[i].bb[0],size-disCont[i].lastAvail);
+      }
+      if (disCont[i].runtotal>disCont[i].bbInLen) {
+        logD("growing dispatch %d bbIn to %d",i,disCont[i].runtotal+256);
+        disCont[i].grow(disCont[i].runtotal+256);
+      }
+      disCont[i].runLeft=disCont[i].runtotal;
+      disCont[i].runPos=0;
     }
-    isBusy.unlock();
-    return;
-  }
 
-  // logic starts here
-  for (int i=0; i<song.systemLen; i++) {
-    // TODO: we may have a problem here
-    disCont[i].lastAvail=blip_samples_avail(disCont[i].bb[0]);
-    if (disCont[i].lastAvail>0) {
-      disCont[i].flush(disCont[i].lastAvail);
+    if (metroTickLen<size) {
+      if (metroTick!=NULL) delete[] metroTick;
+      metroTick=new unsigned char[size];
+      metroTickLen=size;
     }
-    if (size<disCont[i].lastAvail) {
-      disCont[i].runtotal=0;
-    } else {
-      disCont[i].runtotal=blip_clocks_needed(disCont[i].bb[0],size-disCont[i].lastAvail);
-    }
-    if (disCont[i].runtotal>disCont[i].bbInLen) {
-      logV("growing dispatch %d bbIn to %d",i,disCont[i].runtotal+256);
-      delete[] disCont[i].bbIn[0];
-      delete[] disCont[i].bbIn[1];
-      disCont[i].bbIn[0]=new short[disCont[i].runtotal+256];
-      disCont[i].bbIn[1]=new short[disCont[i].runtotal+256];
-      disCont[i].bbInLen=disCont[i].runtotal+256;
-    }
-    disCont[i].runLeft=disCont[i].runtotal;
-    disCont[i].runPos=0;
-  }
 
-  if (metroTickLen<size) {
-    if (metroTick!=NULL) delete[] metroTick;
-    metroTick=new unsigned char[size];
-    metroTickLen=size;
-  }
+    memset(metroTick,0,size);
 
-  memset(metroTick,0,size);
+    int attempts=0;
+    int runLeftG=size<<MASTER_CLOCK_PREC;
+    while (++attempts<(int)size) {
+      // -1. set bufferPos
+      bufferPos=(size<<MASTER_CLOCK_PREC)-runLeftG;
 
-  int attempts=0;
-  int runLeftG=size<<MASTER_CLOCK_PREC;
-  while (++attempts<(int)size) {
-    // 0. check if we've halted
-    if (halted) break;
-    // 1. check whether we are done with all buffers
-    if (runLeftG<=0) break;
+      // 0. check if we've halted
+      if (halted) break;
+      // 1. check whether we are done with all buffers
+      if (runLeftG<=0) break;
 
-    // 2. check whether we gonna tick
-    if (cycles<=0) {
-      // we have to tick
-      if (nextTick()) {
-        lastLoopPos=size-(runLeftG>>MASTER_CLOCK_PREC);
-        logD("last loop pos: %d for a size of %d and runLeftG of %d",lastLoopPos,size,runLeftG);
-        totalLoops++;
-        if (remainingLoops>0) {
-          remainingLoops--;
-          if (!remainingLoops) {
-            logI("end of song!");
-            remainingLoops=-1;
-            playing=false;
-            freelance=false;
-            extValuePresent=false;
-            break;
+      // 2. check whether we gonna tick
+      if (cycles<=0) {
+        // we have to tick
+        if (nextTick()) {
+          lastLoopPos=size-(runLeftG>>MASTER_CLOCK_PREC);
+          logD("last loop pos: %d for a size of %d and runLeftG of %d",lastLoopPos,size,runLeftG);
+          totalLoops++;
+          if (remainingLoops>0) {
+            remainingLoops--;
+            if (!remainingLoops) {
+              logI("end of song!");
+              remainingLoops=-1;
+              playing=false;
+              freelance=false;
+              extValuePresent=false;
+              break;
+            }
+          }
+        }
+        if (pendingMetroTick) {
+          unsigned int realPos=size-(runLeftG>>MASTER_CLOCK_PREC);
+          if (realPos>=size) realPos=size-1;
+          metroTick[realPos]=pendingMetroTick;
+          pendingMetroTick=0;
+        }
+      } else {
+        // 3. tick the clock and fill buffers as needed
+        if (cycles<runLeftG) {
+          for (int i=0; i<song.systemLen; i++) {
+            int total=(cycles*disCont[i].runtotal)/(size<<MASTER_CLOCK_PREC);
+            disCont[i].acquire(disCont[i].runPos,total);
+            disCont[i].runLeft-=total;
+            disCont[i].runPos+=total;
+          }
+          runLeftG-=cycles;
+          cycles=0;
+        } else {
+          cycles-=runLeftG;
+          runLeftG=0;
+          for (int i=0; i<song.systemLen; i++) {
+            disCont[i].acquire(disCont[i].runPos,disCont[i].runLeft);
+            disCont[i].runLeft=0;
           }
         }
       }
-      if (pendingMetroTick) {
-        unsigned int realPos=size-(runLeftG>>MASTER_CLOCK_PREC);
-        if (realPos>=size) realPos=size-1;
-        metroTick[realPos]=pendingMetroTick;
-        pendingMetroTick=0;
+    }
+
+    //logD("attempts: %d",attempts);
+    if (attempts>=(int)size) {
+      logE("hang detected! stopping! at %d seconds %d micro",totalSeconds,totalTicks);
+      freelance=false;
+      playing=false;
+      extValuePresent=false;
+    }
+    totalProcessed=size-(runLeftG>>MASTER_CLOCK_PREC);
+
+    for (int i=0; i<song.systemLen; i++) {
+      if (size<disCont[i].lastAvail) {
+        logW("%d: size<lastAvail! %d<%d",i,size,disCont[i].lastAvail);
+        continue;
       }
-    } else {
-      // 3. tick the clock and fill buffers as needed
-      if (cycles<runLeftG) {
-        for (int i=0; i<song.systemLen; i++) {
-          int total=(cycles*disCont[i].runtotal)/(size<<MASTER_CLOCK_PREC);
-          disCont[i].acquire(disCont[i].runPos,total);
-          disCont[i].runLeft-=total;
-          disCont[i].runPos+=total;
+      disCont[i].fillBuf(disCont[i].runtotal,disCont[i].lastAvail,size-disCont[i].lastAvail);
+    }
+  }
+
+  if (metroBufLen<size || metroBuf==NULL) {
+    if (metroBuf!=NULL) delete[] metroBuf;
+    metroBuf=new float[size];
+    metroBufLen=size;
+  }
+
+  memset(metroBuf,0,metroBufLen*sizeof(float));
+
+  if (playing && !halted && metronome) {
+    for (size_t i=0; i<size; i++) {
+      if (metroTick[i]) {
+        if (metroTick[i]==2) {
+          metroFreq=1400/got.rate;
+        } else {
+          metroFreq=1050/got.rate;
         }
-        runLeftG-=cycles;
-        cycles=0;
-      } else {
-        cycles-=runLeftG;
-        runLeftG=0;
-        for (int i=0; i<song.systemLen; i++) {
-          disCont[i].acquire(disCont[i].runPos,disCont[i].runLeft);
-          disCont[i].runLeft=0;
+        metroPos=0;
+        metroAmp=0.7f;
+      }
+      if (metroAmp>0.0f) {
+        for (int j=0; j<outChans; j++) {
+          metroBuf[i]=(sin(metroPos*2*M_PI))*metroAmp*metroVol;
         }
       }
+      metroAmp-=0.0003f;
+      if (metroAmp<0.0f) metroAmp=0.0f;
+      metroPos+=metroFreq;
+      while (metroPos>=1) metroPos--;
     }
   }
 
-  if (out==NULL || halted) {
-    isBusy.unlock();
-    return;
-  }
+  // resolve patchbay
+  for (unsigned int i: song.patchbay) {
+    const unsigned short srcPort=i>>16;
+    const unsigned short destPort=i&0xffff;
 
-  //logD("attempts: %d",attempts);
-  if (attempts>=(int)size) {
-    logE("hang detected! stopping! at %d seconds %d micro",totalSeconds,totalTicks);
-    freelance=false;
-    playing=false;
-    extValuePresent=false;
-  }
-  totalProcessed=size-(runLeftG>>MASTER_CLOCK_PREC);
+    const unsigned short srcPortSet=srcPort>>4;
+    const unsigned short destPortSet=destPort>>4;
+    const unsigned char srcSubPort=srcPort&15;
+    const unsigned char destSubPort=destPort&15;
 
-  for (int i=0; i<song.systemLen; i++) {
-    if (size<disCont[i].lastAvail) {
-      logW("%d: size<lastAvail! %d<%d",i,size,disCont[i].lastAvail);
-      continue;
-    }
-    disCont[i].fillBuf(disCont[i].runtotal,disCont[i].lastAvail,size-disCont[i].lastAvail);
-  }
+    // null portset
+    if (destPortSet==0xfff) continue;
 
-  for (int i=0; i<song.systemLen; i++) {
-    float volL=((float)song.systemVol[i]/64.0f)*((float)MIN(127,127-(int)song.systemPan[i])/127.0f)*song.masterVol;
-    float volR=((float)song.systemVol[i]/64.0f)*((float)MIN(127,127+(int)song.systemPan[i])/127.0f)*song.masterVol;
-    volL*=disCont[i].dispatch->getPostAmp();
-    volR*=disCont[i].dispatch->getPostAmp();
-    if (disCont[i].dispatch->isStereo()) {
-      for (size_t j=0; j<size; j++) {
-        out[0][j]+=((float)disCont[i].bbOut[0][j]/32768.0)*volL;
-        out[1][j]+=((float)disCont[i].bbOut[1][j]/32768.0)*volR;
+    // system outputs
+    if (destPortSet==0x000) {
+      if (destSubPort>=outChans) continue;
+
+      // chip outputs
+      if (srcPortSet<song.systemLen && playing && !halted) {
+        if (srcSubPort<disCont[srcPortSet].dispatch->getOutputCount()) {
+          float vol=song.systemVol[srcPortSet]*disCont[srcPortSet].dispatch->getPostAmp()*song.masterVol;
+
+          switch (destSubPort&3) {
+            case 0:
+              vol*=MIN(1.0f,1.0f-song.systemPan[srcPortSet])*MIN(1.0f,1.0f+song.systemPanFR[srcPortSet]);
+              break;
+            case 1:
+              vol*=MIN(1.0f,1.0f+song.systemPan[srcPortSet])*MIN(1.0f,1.0f+song.systemPanFR[srcPortSet]);
+              break;
+            case 2:
+              vol*=MIN(1.0f,1.0f-song.systemPan[srcPortSet])*MIN(1.0f,1.0f-song.systemPanFR[srcPortSet]);
+              break;
+            case 3:
+              vol*=MIN(1.0f,1.0f+song.systemPan[srcPortSet])*MIN(1.0f,1.0f-song.systemPanFR[srcPortSet]);
+              break;
+          }
+
+          for (size_t j=0; j<size; j++) {
+            out[destSubPort][j]+=((float)disCont[srcPortSet].bbOut[srcSubPort][j]/32768.0)*vol;
+          }
+        }
+      } else if (srcPortSet==0xffd) {
+        // sample preview
+        for (size_t j=0; j<size; j++) {
+          out[destSubPort][j]+=samp_bbOut[j]/32768.0;
+        }
+      } else if (srcPortSet==0xffe && playing && !halted) {
+        // metronome
+        for (size_t j=0; j<size; j++) {
+          out[destSubPort][j]+=metroBuf[j];
+        }
       }
-    } else {
-      for (size_t j=0; j<size; j++) {
-        out[0][j]+=((float)disCont[i].bbOut[0][j]/32768.0)*volL;
-        out[1][j]+=((float)disCont[i].bbOut[0][j]/32768.0)*volR;
-      }
-    }
-  }
 
-  if (metronome) for (size_t i=0; i<size; i++) {
-    if (metroTick[i]) {
-      if (metroTick[i]==2) {
-        metroFreq=1400/got.rate;
-      } else {
-        metroFreq=1050/got.rate;
-      }
-      metroPos=0;
-      metroAmp=0.7f;
+      // nothing/invalid
     }
-    if (metroAmp>0.0f) {
-      out[0][i]+=(sin(metroPos*2*M_PI))*metroAmp*metroVol;
-      out[1][i]+=(sin(metroPos*2*M_PI))*metroAmp*metroVol;
-    }
-    metroAmp-=0.0003f;
-    if (metroAmp<0.0f) metroAmp=0.0f;
-    metroPos+=metroFreq;
-    while (metroPos>=1) metroPos--;
+
+    // nothing/invalid
   }
 
   for (unsigned int i=0; i<size; i++) {
-    oscBuf[0][oscWritePos]=out[0][i];
-    oscBuf[1][oscWritePos]=out[1][i];
+    for (int j=0; j<outChans; j++) {
+      if (oscBuf[j]==NULL) continue;
+      oscBuf[j][oscWritePos]=out[j][i];
+    }
     if (++oscWritePos>=32768) oscWritePos=0;
   }
   oscSize=size;
 
-  if (forceMono) {
+  if (forceMono && outChans>1) {
     for (size_t i=0; i<size; i++) {
-      out[0][i]=(out[0][i]+out[1][i])*0.5;
-      out[1][i]=out[0][i];
+      float chanSum=out[0][i];
+      for (int j=1; j<outChans; j++) {
+        chanSum=out[j][i];
+      }
+      out[0][i]=chanSum/outChans;
+      for (int j=1; j<outChans; j++) {
+        out[j][i]=out[0][i];
+      }
     }
   }
   if (clampSamples) {
     for (size_t i=0; i<size; i++) {
-      if (out[0][i]<-1.0) out[0][i]=-1.0;
-      if (out[0][i]>1.0) out[0][i]=1.0;
-      if (out[1][i]<-1.0) out[1][i]=-1.0;
-      if (out[1][i]>1.0) out[1][i]=1.0;
+      for (int j=0; j<outChans; j++) {
+        if (out[j][i]<-1.0) out[j][i]=-1.0;
+        if (out[j][i]>1.0) out[j][i]=1.0;
+      }
     }
   }
   isBusy.unlock();
diff --git a/src/engine/song.h b/src/engine/song.h
index d7c28736..dfe579bb 100644
--- a/src/engine/song.h
+++ b/src/engine/song.h
@@ -238,8 +238,9 @@ struct DivSong {
   // system
   DivSystem system[DIV_MAX_CHIPS];
   unsigned char systemLen;
-  signed char systemVol[DIV_MAX_CHIPS];
-  signed char systemPan[DIV_MAX_CHIPS];
+  float systemVol[DIV_MAX_CHIPS];
+  float systemPan[DIV_MAX_CHIPS];
+  float systemPanFR[DIV_MAX_CHIPS];
   DivConfig systemFlags[DIV_MAX_CHIPS];
 
   // song information
@@ -328,12 +329,14 @@ struct DivSong {
   bool disableSampleMacro;
   bool autoSystem;
   bool oldArpStrategy;
+  bool patchbayAuto;
 
   std::vector<DivInstrument*> ins;
   std::vector<DivWavetable*> wave;
   std::vector<DivSample*> sample;
 
   std::vector<DivSubSong*> subsong;
+  std::vector<unsigned int> patchbay;
 
   DivInstrument nullIns, nullInsOPLL, nullInsOPL, nullInsOPLDrums, nullInsQSound;
   DivWavetable nullWave;
@@ -435,11 +438,13 @@ struct DivSong {
     snNoLowPeriods(false),
     disableSampleMacro(false),
     autoSystem(true),
-    oldArpStrategy(false) {
+    oldArpStrategy(false),
+    patchbayAuto(true) {
     for (int i=0; i<DIV_MAX_CHIPS; i++) {
       system[i]=DIV_SYSTEM_NULL;
-      systemVol[i]=64;
-      systemPan[i]=0;
+      systemVol[i]=1.0;
+      systemPan[i]=0.0;
+      systemPanFR[i]=0.0;
     }
     subsong.push_back(new DivSubSong);
     system[0]=DIV_SYSTEM_YM2612;
diff --git a/src/gui/about.cpp b/src/gui/about.cpp
index fc8e6c47..95dded95 100644
--- a/src/gui/about.cpp
+++ b/src/gui/about.cpp
@@ -205,7 +205,13 @@ void FurnaceGUI::drawAbout() {
     float r=0;
     float g=0;
     float b=0;
-    float peakMix=settings.partyTime?((peak[0]+peak[1])*0.5):0.3;
+    float peakMix=settings.partyTime?0:0.3;
+    if (settings.partyTime) {
+      for (int j=0; j<e->getAudioDescGot().outChans; j++) {
+        peakMix+=peak[j];
+      }
+      peakMix/=e->getAudioDescGot().outChans;
+    }
     ImGui::ColorConvertHSVtoRGB(aboutHue,1.0,0.25+MIN(0.75f,peakMix*0.75f),r,g,b);
     dl->AddRectFilled(ImVec2(0,0),ImVec2(canvasW,canvasH),0xff000000);
     bool skip=false;
diff --git a/src/gui/debug.cpp b/src/gui/debug.cpp
index 3c2ed3e7..dc40e5ba 100644
--- a/src/gui/debug.cpp
+++ b/src/gui/debug.cpp
@@ -931,6 +931,7 @@ void putDispatchChan(void* data, int chanNum, int type) {
       ImGui::Text("  - RVRamp: %d",ch->overwrite.envelope.rVRamp);
       ImGui::Text("  - K1Ramp: %d",ch->overwrite.envelope.k1Ramp);
       ImGui::Text("  - K2Ramp: %d",ch->overwrite.envelope.k2Ramp);
+      ImGui::Text("- CA: %.2x",ch->ca);
       ImGui::Text("- LVol: %.2x",ch->lVol);
       ImGui::Text("- RVol: %.2x",ch->rVol);
       ImGui::Text("- outLVol: %.2x",ch->outLVol);
@@ -954,7 +955,6 @@ void putDispatchChan(void* data, int chanNum, int type) {
       ImGui::TextColored(ch->pcmChanged.position?colorOn:colorOff,">> PCMPositionChanged");
       ImGui::TextColored(ch->pcmChanged.loopBank?colorOn:colorOff,">> PCMLoopBankChanged");
       ImGui::TextColored(ch->isReverseLoop?colorOn:colorOff,">> IsReverseLoop");
-      ImGui::TextColored(ch->pcm.reversed?colorOn:colorOff,">> PCMReversed");
       ImGui::TextColored(ch->pcm.pause?colorOn:colorOff,">> PCMPause");
       ImGui::TextColored(ch->pcm.direction?colorOn:colorOff,">> PCMDirection");
       ImGui::TextColored(ch->envelope.k1Slow?colorOn:colorOff,">> EnvK1Slow");
diff --git a/src/gui/editControls.cpp b/src/gui/editControls.cpp
index 912665f6..173b64de 100644
--- a/src/gui/editControls.cpp
+++ b/src/gui/editControls.cpp
@@ -449,6 +449,10 @@ void FurnaceGUI::drawMobileControls() {
         mobScene=GUI_SCENE_CHIPS;
       }
       ImGui::TableNextColumn();
+      if (ImGui::Button("Mixer",buttonSize)) {
+        mobScene=GUI_SCENE_MIXER;
+      }
+      ImGui::TableNextColumn();
       if (ImGui::Button("Other",buttonSize)) {
         mobScene=GUI_SCENE_OTHER;
       }
@@ -521,6 +525,9 @@ void FurnaceGUI::drawMobileControls() {
         case GUI_SCENE_CHIPS:
           ImGui::Text("Chips here...");
           break;
+        case GUI_SCENE_MIXER:
+          ImGui::Text("What the hell...");
+          break;
         case GUI_SCENE_OTHER: {
           if (ImGui::Button("Osc")) {
             oscOpen=!oscOpen;
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 59d23f2e..1ec735f1 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -3863,6 +3863,11 @@ bool FurnaceGUI::loop() {
           curWindow=GUI_WINDOW_SYS_MANAGER;
           drawSysManager();
           break;
+        case GUI_SCENE_MIXER:
+          mixerOpen=true;
+          curWindow=GUI_WINDOW_MIXER;
+          drawMixer();
+          break;
         default:
           patternOpen=true;
           curWindow=GUI_WINDOW_PATTERN;
@@ -6016,6 +6021,14 @@ FurnaceGUI::FurnaceGUI():
   openSampleAmplifyOpt(false),
   openSampleSilenceOpt(false),
   openSampleFilterOpt(false),
+  selectedPortSet(0x1fff),
+  selectedSubPort(-1),
+  hoveredPortSet(0x1fff),
+  hoveredSubPort(-1),
+  portDragActive(false),
+  displayHiddenPorts(false),
+  displayInternalPorts(false),
+  subPortPos(0.0f,0.0f),
   oscTotal(0),
   oscZoom(0.5f),
   oscWindowSize(20.0f),
@@ -6095,8 +6108,7 @@ FurnaceGUI::FurnaceGUI():
 
   memset(willExport,1,DIV_MAX_CHIPS*sizeof(bool));
 
-  peak[0]=0;
-  peak[1]=0;
+  memset(peak,0,DIV_MAX_OUTPUTS*sizeof(float));
 
   opMaskTransposeNote.note=true;
   opMaskTransposeNote.ins=false;
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 88c30651..15319f74 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -270,6 +270,13 @@ enum FurnaceGUIColors {
   GUI_COLOR_CLOCK_BEAT_LOW,
   GUI_COLOR_CLOCK_BEAT_HIGH,
 
+  GUI_COLOR_PATCHBAY_PORTSET,
+  GUI_COLOR_PATCHBAY_PORT,
+  GUI_COLOR_PATCHBAY_PORT_HIDDEN,
+  GUI_COLOR_PATCHBAY_CONNECTION,
+  GUI_COLOR_PATCHBAY_CONNECTION_BG,
+  GUI_COLOR_PATCHBAY_CONNECTION_HI,
+
   GUI_COLOR_LOGLEVEL_ERROR,
   GUI_COLOR_LOGLEVEL_WARNING,
   GUI_COLOR_LOGLEVEL_INFO,
@@ -325,6 +332,7 @@ enum FurnaceGUIMobileScenes {
   GUI_SCENE_SONG,
   GUI_SCENE_CHANNELS,
   GUI_SCENE_CHIPS,
+  GUI_SCENE_MIXER,
   GUI_SCENE_OTHER,
 };
 
@@ -935,9 +943,9 @@ struct Gradient2D {
 
 struct FurnaceGUISysDefChip {
   DivSystem sys;
-  int vol, pan;
+  float vol, pan;
   const char* flags;
-  FurnaceGUISysDefChip(DivSystem s, int v, int p, const char* f):
+  FurnaceGUISysDefChip(DivSystem s, float v, float p, const char* f):
     sys(s),
     vol(v),
     pan(p),
@@ -1172,6 +1180,7 @@ class FurnaceGUI {
     int mainFontSize, patFontSize, iconSize;
     int audioEngine;
     int audioQuality;
+    int audioChans;
     int arcadeCore;
     int ym2612Core;
     int snCore;
@@ -1306,6 +1315,7 @@ class FurnaceGUI {
       iconSize(16),
       audioEngine(DIV_AUDIO_SDL),
       audioQuality(0),
+      audioChans(2),
       arcadeCore(0),
       ym2612Core(0),
       snCore(0),
@@ -1458,7 +1468,7 @@ class FurnaceGUI {
   bool keepLoopAlive, orderScrollLocked, orderScrollTolerance, dragMobileMenu, dragMobileEditButton;
   FurnaceGUIWindows curWindow, nextWindow, curWindowLast;
   std::atomic<FurnaceGUIWindows> curWindowThreadSafe;
-  float peak[2];
+  float peak[DIV_MAX_OUTPUTS];
   float patChanX[DIV_MAX_CHANS+1];
   float patChanSlideY[DIV_MAX_CHANS+1];
   float lastPatternWidth, longThreshold;
@@ -1649,6 +1659,17 @@ class FurnaceGUI {
   size_t sampleClipboardLen;
   bool openSampleResizeOpt, openSampleResampleOpt, openSampleAmplifyOpt, openSampleSilenceOpt, openSampleFilterOpt;
 
+  // mixer
+  // 0xxx: output
+  // 1xxx: input
+  unsigned int selectedPortSet;
+  // any value not between 0 and 15 are "none"
+  int selectedSubPort;
+  unsigned int hoveredPortSet;
+  int hoveredSubPort;
+  bool portDragActive, displayHiddenPorts, displayInternalPorts;
+  ImVec2 subPortPos;
+
   // oscilloscope
   int oscTotal;
   float oscValues[512];
@@ -1757,6 +1778,10 @@ class FurnaceGUI {
   // inverted checkbox
   bool InvCheckbox(const char* label, bool* value);
 
+  // mixer stuff
+  ImVec2 calcPortSetSize(String label, int ins, int outs);
+  bool portSet(String label, unsigned int portSetID, int ins, int outs, int activeIns, int activeOuts, int& clickedPort, std::map<unsigned int,ImVec2>& portPos);
+
   void updateWindowTitle();
   void autoDetectSystem();
   void prepareLayout();
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index fc6f46dc..d51dd8d0 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -319,9 +319,9 @@ const FurnaceGUIColors fxColors[256]={
   GUI_COLOR_PATTERN_EFFECT_INVALID,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
+  GUI_COLOR_PATTERN_EFFECT_PANNING,
+  GUI_COLOR_PATTERN_EFFECT_PANNING,
+  GUI_COLOR_PATTERN_EFFECT_PANNING,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
@@ -896,6 +896,13 @@ const FurnaceGUIColorDef guiColors[GUI_COLOR_MAX]={
   D(GUI_COLOR_CLOCK_BEAT_LOW,"",ImVec4(0.1f,0.13f,0.25f,1.0f)),
   D(GUI_COLOR_CLOCK_BEAT_HIGH,"",ImVec4(0.5f,0.8f,1.0f,1.0f)),
 
+  D(GUI_COLOR_PATCHBAY_PORTSET,"",ImVec4(0.25f,0.25f,0.25f,1.0f)),
+  D(GUI_COLOR_PATCHBAY_PORT,"",ImVec4(0.3f,0.4f,0.6f,1.0f)),
+  D(GUI_COLOR_PATCHBAY_PORT_HIDDEN,"",ImVec4(0.4f,0.4f,0.4f,1.0f)),
+  D(GUI_COLOR_PATCHBAY_CONNECTION,"",ImVec4(0.3f,0.55f,0.8f,1.0f)),
+  D(GUI_COLOR_PATCHBAY_CONNECTION_BG,"",ImVec4(0.1f,0.25f,0.3f,1.0f)),
+  D(GUI_COLOR_PATCHBAY_CONNECTION_HI,"",ImVec4(0.2f,1.0f,1.0f,1.0f)),
+
   D(GUI_COLOR_LOGLEVEL_ERROR,"",ImVec4(1.0f,0.2f,0.2f,1.0f)),
   D(GUI_COLOR_LOGLEVEL_WARNING,"",ImVec4(1.0f,1.0f,0.2f,1.0f)),
   D(GUI_COLOR_LOGLEVEL_INFO,"",ImVec4(0.4f,1.0f,0.4f,1.0f)),
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index e0844328..09ac9a06 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -283,8 +283,8 @@ const char* es5506FilterModes[4]={
   "HP/K2, HP/K2", "HP/K2, LP/K1", "LP/K2, LP/K2", "LP/K2, LP/K1",
 };
 
-const char* panBits[3]={
-  "right", "left", NULL
+const char* panBits[5]={
+  "right", "left", "rear right", "rear left", NULL
 };
 
 const char* oneBit[2]={
@@ -1850,6 +1850,7 @@ void FurnaceGUI::drawMacros(std::vector<FurnaceGUIMacroDesc>& macros, FurnaceGUI
     case 2: {
       int columns=round(ImGui::GetContentRegionAvail().x/(400.0*dpiScale));
       int curColumn=0;
+      if (columns<1) columns=1;
       if (ImGui::BeginTable("MacroGrid",columns,ImGuiTableFlags_BordersInner)) {
         for (FurnaceGUIMacroDesc& i: macros) {
           if (curColumn==0) ImGui::TableNextRow();
@@ -4295,12 +4296,6 @@ void FurnaceGUI::drawInsEdit() {
               }
               ImGui::EndCombo();
             }
-            ImGui::BeginDisabled(ins->amiga.useWave);
-            bool reversed=ins->amiga.reversed==DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_ENABLE;
-            if (ImGui::Checkbox("Reversed playback",&reversed)) { PARAMETER
-              ins->amiga.reversed=reversed?DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_ENABLE:DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DISABLE;
-            }
-            ImGui::EndDisabled();
             // Wavetable
             if (ins->type==DIV_INS_AMIGA || ins->type==DIV_INS_SNES) {
               ImGui::BeginDisabled(ins->amiga.useNoteMap);
@@ -4332,11 +4327,10 @@ void FurnaceGUI::drawInsEdit() {
             P(ImGui::Checkbox("Use sample map",&ins->amiga.useNoteMap));
             if (ins->amiga.useNoteMap) {
               // TODO: frequency map?
-              if (ImGui::BeginTable("NoteMap",3/*4*/,ImGuiTableFlags_ScrollY|ImGuiTableFlags_Borders|ImGuiTableFlags_SizingStretchSame)) {
+              if (ImGui::BeginTable("NoteMap",2/*3*/,ImGuiTableFlags_ScrollY|ImGuiTableFlags_Borders|ImGuiTableFlags_SizingStretchSame)) {
                 ImGui::TableSetupColumn("c0",ImGuiTableColumnFlags_WidthFixed);
                 ImGui::TableSetupColumn("c1",ImGuiTableColumnFlags_WidthStretch);
-                ImGui::TableSetupColumn("c2",ImGuiTableColumnFlags_WidthStretch);
-                //ImGui::TableSetupColumn("c3",ImGuiTableColumnFlags_WidthStretch);
+                //ImGui::TableSetupColumn("c2",ImGuiTableColumnFlags_WidthStretch);
 
                 ImGui::TableSetupScrollFreeze(0,1);
 
@@ -4346,8 +4340,6 @@ void FurnaceGUI::drawInsEdit() {
                 ImGui::Text("Sample");
                 /*ImGui::TableNextColumn();
                 ImGui::Text("Frequency");*/
-                ImGui::TableNextColumn();
-                ImGui::Text("Reversed");
                 for (int i=0; i<120; i++) {
                   DivInstrumentAmiga::SampleMap& sampleMap=ins->amiga.noteMap[i];
                   ImGui::TableNextRow();
@@ -4383,16 +4375,6 @@ void FurnaceGUI::drawInsEdit() {
                     if (sampleMap.freq>262144) sampleMap.freq=262144;
                   }
                   */
-                  ImGui::TableNextColumn();
-                  if (ImGui::RadioButton(fmt::sprintf("Disable##SampleMap_Reversed_Disable_%d",i).c_str(),sampleMap.reversed==DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DISABLE)) { MARK_MODIFIED
-                    sampleMap.reversed=DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DISABLE;
-                  }
-                  if (ImGui::RadioButton(fmt::sprintf("Enable##SampleMap_Reversed_Enable_%d",i).c_str(),sampleMap.reversed==DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_ENABLE)) { MARK_MODIFIED
-                    sampleMap.reversed=DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_ENABLE;
-                  }
-                  if (ImGui::RadioButton(fmt::sprintf("Use instrument setting##SampleMap_Reversed_Default_%d",i).c_str(),sampleMap.reversed==DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DEFAULT)) { MARK_MODIFIED
-                    sampleMap.reversed=DivInstrumentAmiga::DivReverseMode::DIV_REVERSE_DEFAULT;
-                  }
                   ImGui::PopID();
                 }
                 ImGui::EndTable();
@@ -5240,15 +5222,18 @@ void FurnaceGUI::drawInsEdit() {
           if (ins->type==DIV_INS_STD ||//Game Gear
               ins->type==DIV_INS_FM ||
               ins->type==DIV_INS_OPM ||
-              ins->type==DIV_INS_OPL ||
-              ins->type==DIV_INS_OPL_DRUMS ||
               ins->type==DIV_INS_GB ||
               ins->type==DIV_INS_OPZ ||
               ins->type==DIV_INS_MSM6258 ||
               ins->type==DIV_INS_VERA ||
               ins->type==DIV_INS_ADPCMA ||
               ins->type==DIV_INS_ADPCMB) {
-            panMax=1;
+            panMax=2;
+            panSingle=true;
+          }
+          if (ins->type==DIV_INS_OPL ||
+              ins->type==DIV_INS_OPL_DRUMS) {
+            panMax=4;
             panSingle=true;
           }
           if (ins->type==DIV_INS_X1_010 || ins->type==DIV_INS_PCE || ins->type==DIV_INS_MIKEY ||
@@ -5313,7 +5298,7 @@ void FurnaceGUI::drawInsEdit() {
           }
           if (panMax>0) {
             if (panSingle) {
-              macroList.push_back(FurnaceGUIMacroDesc("Panning",&ins->std.panLMacro,0,2,32,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,panBits));
+              macroList.push_back(FurnaceGUIMacroDesc("Panning",&ins->std.panLMacro,0,panMax,32,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,panBits));
             } else if (ins->type==DIV_INS_QSOUND) {
               macroList.push_back(FurnaceGUIMacroDesc("Panning",&ins->std.panLMacro,panMin,panMax,CLAMP(31+panMax-panMin,32,160),uiColors[GUI_COLOR_MACRO_OTHER]));
               macroList.push_back(FurnaceGUIMacroDesc("Surround",&ins->std.panRMacro,0,1,32,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true));
@@ -5450,6 +5435,7 @@ void FurnaceGUI::drawInsEdit() {
             macroList.push_back(FurnaceGUIMacroDesc("Envelope K1 ramp",&ins->std.ex6Macro,-128,127,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             macroList.push_back(FurnaceGUIMacroDesc("Envelope K2 ramp",&ins->std.ex7Macro,-128,127,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             macroList.push_back(FurnaceGUIMacroDesc("Envelope mode",&ins->std.ex8Macro,0,2,64,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,es5506EnvelopeModes));
+            macroList.push_back(FurnaceGUIMacroDesc("Channel assignment",&ins->std.fbMacro,0,5,64,uiColors[GUI_COLOR_MACRO_OTHER]));
             macroList.push_back(FurnaceGUIMacroDesc("Control",&ins->std.algMacro,0,2,32,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,es5506ControlModes));
           }
           if (ins->type==DIV_INS_MSM5232) {
diff --git a/src/gui/mixer.cpp b/src/gui/mixer.cpp
index 019336ae..c9aa96b8 100644
--- a/src/gui/mixer.cpp
+++ b/src/gui/mixer.cpp
@@ -19,6 +19,193 @@
 
 #include "gui.h"
 #include "intConst.h"
+#include <fmt/printf.h>
+#include "../ta-log.h"
+#include "imgui_internal.h"
+
+const char* portNamesStereo[2]={
+  "left",
+  "right"
+};
+
+ImVec2 FurnaceGUI::calcPortSetSize(String label, int ins, int outs) {
+  ImGuiStyle& style=ImGui::GetStyle();
+
+  ImVec2 labelSize=ImGui::CalcTextSize(label.c_str(),NULL,false,ImGui::GetWindowSize().x*0.6f);
+
+  ImVec2 size=labelSize;
+
+  // pad
+  size.x+=style.FramePadding.x*2.0f;
+  size.y+=style.FramePadding.y*2.0f;
+
+  // space for ports
+  size.y+=MAX(ins,outs)*(labelSize.y+style.FramePadding.y+style.ItemSpacing.y);
+
+  return size;
+}
+
+bool FurnaceGUI::portSet(String label, unsigned int portSetID, int ins, int outs, int activeIns, int activeOuts, int& clickedPort, std::map<unsigned int,ImVec2>& portPos) {
+  String portID=fmt::sprintf("portSet%.4x",portSetID);
+
+  ImDrawList* dl=ImGui::GetWindowDrawList();
+  ImGuiWindow* window=ImGui::GetCurrentWindow();
+  ImGuiStyle& style=ImGui::GetStyle();
+
+  ImVec2 labelSize=ImGui::CalcTextSize(label.c_str(),NULL,false,ImGui::GetWindowSize().x*0.6f);
+
+  ImVec2 size=labelSize;
+
+  // pad
+  size.x+=style.FramePadding.x*2.0f;
+  size.y+=style.FramePadding.y*2.0f;
+
+  // space for ports
+  size.y+=MAX(ins,outs)*(ImGui::GetFontSize()+style.FramePadding.y+style.ItemSpacing.y);
+
+  ImVec4 portSetBorderColor=uiColors[GUI_COLOR_PATCHBAY_PORTSET];
+  ImVec4 portSetColor=ImVec4(
+    portSetBorderColor.x*0.75f,
+    portSetBorderColor.y*0.75f,
+    portSetBorderColor.z*0.75f,
+    portSetBorderColor.w
+  );
+
+  ImVec4 portBorderColor=uiColors[GUI_COLOR_PATCHBAY_PORT];
+  ImVec4 portColor=ImVec4(
+    portBorderColor.x*0.75f,
+    portBorderColor.y*0.75f,
+    portBorderColor.z*0.75f,
+    portBorderColor.w
+  );
+
+  ImVec4 portBorderColorH=uiColors[GUI_COLOR_PATCHBAY_PORT_HIDDEN];
+  ImVec4 portColorH=ImVec4(
+    portBorderColorH.x*0.75f,
+    portBorderColorH.y*0.75f,
+    portBorderColorH.z*0.75f,
+    portBorderColorH.w
+  );
+
+  ImVec2 minArea=window->DC.CursorPos;
+  ImVec2 maxArea=ImVec2(
+    minArea.x+size.x,
+    minArea.y+size.y
+  );
+  ImRect rect=ImRect(minArea,maxArea);
+
+  ImVec2 textPos=ImVec2(
+    minArea.x+style.FramePadding.x,
+    minArea.y+style.FramePadding.y
+  );
+
+  ImGui::ItemSize(size,style.FramePadding.y);
+  bool visible=ImGui::ItemAdd(rect,ImGui::GetID(portID.c_str()));
+  bool hovered=false;
+  bool active=false;
+  if (visible) {
+    hovered=ImGui::ItemHoverable(rect,ImGui::GetID(portID.c_str()));
+    active=(hovered && ImGui::IsMouseClicked(ImGuiMouseButton_Left));
+
+    if (hovered && ImGui::IsMouseClicked(ImGuiMouseButton_Right)) {
+      ImGui::OpenPopup("SubPortOptions");
+      selectedPortSet=portSetID;
+      clickedPort=-1;
+    }
+
+    if (hovered) hoveredPortSet=portSetID;
+    if (active) clickedPort=-1;
+
+    // label
+    dl->AddRectFilled(minArea,maxArea,ImGui::GetColorU32(portSetColor),0.0f);
+    dl->AddRect(minArea,maxArea,ImGui::GetColorU32((selectedPortSet==portSetID)?uiColors[GUI_COLOR_TEXT]:portSetBorderColor),0.0f,0,dpiScale);
+    dl->AddText(ImGui::GetFont(),ImGui::GetFontSize(),textPos,ImGui::GetColorU32(uiColors[GUI_COLOR_TEXT]),label.c_str(),NULL,ImGui::GetWindowSize().x*0.6f);
+  }
+
+  // input ports
+  for (int i=0; i<ins; i++) {
+    String portLabel="input";
+    String subPortID=fmt::sprintf("subPort%.5x",(portSetID<<4)|i);
+    if (ins==2) {
+      portLabel=portNamesStereo[i&1];
+    } else if (ins>2) {
+      portLabel=fmt::sprintf("%d",i+1);
+    }
+    ImVec2 portLabelSize=ImGui::CalcTextSize(portLabel.c_str());
+
+    ImVec2 portMin=ImVec2(
+      minArea.x,
+      minArea.y+style.FramePadding.y+labelSize.y+style.ItemSpacing.y+(style.ItemSpacing.y+portLabelSize.y+style.FramePadding.y)*i
+    );
+    ImVec2 portMax=ImVec2(
+      minArea.x+portLabelSize.x+style.FramePadding.x,
+      portMin.y+style.FramePadding.y+portLabelSize.y
+    );
+    ImRect portRect=ImRect(portMin,portMax);
+    ImVec2 portLabelPos=portMin;
+    portLabelPos.x+=style.FramePadding.x*0.5;
+    portLabelPos.y+=style.FramePadding.y*0.5;
+
+    portPos[(portSetID<<4)|i]=ImLerp(portMin,portMax,ImVec2(0.0f,0.5f));
+
+    if (visible) {
+      if (ImGui::ItemAdd(portRect,ImGui::GetID(subPortID.c_str()))) {
+        dl->AddRectFilled(portMin,portMax,ImGui::GetColorU32((i<activeIns)?portColor:portColorH),0.0f);
+        dl->AddRect(portMin,portMax,ImGui::GetColorU32((i<activeIns)?portBorderColor:portBorderColorH),0.0f,dpiScale);
+        dl->AddText(portLabelPos,ImGui::GetColorU32(uiColors[GUI_COLOR_TEXT]),portLabel.c_str());
+      }
+
+      if (ImGui::IsMouseHoveringRect(portMin,portMax)) {
+        hoveredSubPort=i;
+        if (active) clickedPort=i;
+      }
+    }
+  }
+
+  // output ports
+  for (int i=0; i<outs; i++) {
+    String portLabel="output";
+    String subPortID=fmt::sprintf("subPort%.5x",(portSetID<<4)|i);
+    if (outs==2) {
+      portLabel=portNamesStereo[i&1];
+    } else if (outs>2) {
+      portLabel=fmt::sprintf("%d",i+1);
+    }
+    ImVec2 portLabelSize=ImGui::CalcTextSize(portLabel.c_str());
+
+    ImVec2 portMin=ImVec2(
+      maxArea.x-portLabelSize.x-style.FramePadding.x,
+      minArea.y+style.FramePadding.y+labelSize.y+style.ItemSpacing.y+(style.ItemSpacing.y+portLabelSize.y+style.FramePadding.y)*i
+    );
+    ImVec2 portMax=ImVec2(
+      maxArea.x,
+      portMin.y+style.FramePadding.y+portLabelSize.y
+    );
+    ImRect portRect=ImRect(portMin,portMax);
+    ImVec2 portLabelPos=portMin;
+    portLabelPos.x+=style.FramePadding.x*0.5;
+    portLabelPos.y+=style.FramePadding.y*0.5;
+
+    portPos[(portSetID<<4)|i]=ImLerp(portMin,portMax,ImVec2(1.0f,0.5f));
+
+    if (visible) {
+      if (ImGui::ItemAdd(portRect,ImGui::GetID(subPortID.c_str()))) {
+        dl->AddRectFilled(portMin,portMax,ImGui::GetColorU32((i<activeOuts)?portColor:portColorH),0.0f);
+        dl->AddRect(portMin,portMax,ImGui::GetColorU32((i<activeOuts)?portBorderColor:portBorderColorH),0.0f,dpiScale);
+        dl->AddText(portLabelPos,ImGui::GetColorU32(uiColors[GUI_COLOR_TEXT]),portLabel.c_str());
+      }
+
+      if (ImGui::IsMouseHoveringRect(portMin,portMax)) {
+        if (active) clickedPort=i;
+        hoveredSubPort=i;
+    }
+    }
+  }
+
+  if (visible && hovered && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) return true;
+
+  return false;
+}
 
 void FurnaceGUI::drawMixer() {
   if (nextWindow==GUI_WINDOW_MIXER) {
@@ -27,37 +214,217 @@ void FurnaceGUI::drawMixer() {
     nextWindow=GUI_WINDOW_NOTHING;
   }
   if (!mixerOpen) return;
-  ImGui::SetNextWindowSizeConstraints(ImVec2(400.0f*dpiScale,200.0f*dpiScale),ImVec2(canvasW,canvasH));
+  if (mobileUI) {
+    patWindowPos=(portrait?ImVec2(0.0f,(mobileMenuPos*-0.65*canvasH)):ImVec2((0.16*canvasH)+0.5*canvasW*mobileMenuPos,0.0f));
+    patWindowSize=(portrait?ImVec2(canvasW,canvasH-(0.16*canvasW)):ImVec2(canvasW-(0.16*canvasH),canvasH));
+    ImGui::SetNextWindowPos(patWindowPos);
+    ImGui::SetNextWindowSize(patWindowSize);
+  } else {
+    ImGui::SetNextWindowSizeConstraints(ImVec2(400.0f*dpiScale,200.0f*dpiScale),ImVec2(canvasW,canvasH));
+  }
   if (ImGui::Begin("Mixer",&mixerOpen,globalWinFlags|(settings.allowEditDocking?0:ImGuiWindowFlags_NoDocking))) {
-    char id[32];
+    std::map<unsigned int,ImVec2> portPos;
     if (ImGui::SliderFloat("Master Volume",&e->song.masterVol,0,3,"%.2fx")) {
       if (e->song.masterVol<0) e->song.masterVol=0;
       if (e->song.masterVol>3) e->song.masterVol=3;
       MARK_MODIFIED;
     } rightClickable
-    for (int i=0; i<e->song.systemLen; i++) {
-      snprintf(id,31,"MixS%d",i);
-      bool doInvert=e->song.systemVol[i]&128;
-      signed char vol=e->song.systemVol[i]&127;
-      ImGui::PushID(id);
-      ImGui::Text("%d. %s",i+1,getSystemName(e->song.system[i]));
-      ImGui::SameLine(ImGui::GetWindowWidth()-(82.0f*dpiScale));
-      if (ImGui::Checkbox("Invert",&doInvert)) {
-        e->song.systemVol[i]^=128;
+    if (selectedPortSet<e->song.systemLen) {
+      if (ImGui::BeginTable("CurPortSet",2)) {
+        ImGui::TableSetupColumn("c0",ImGuiTableColumnFlags_WidthStretch);
+        ImGui::TableSetupColumn("c1",ImGuiTableColumnFlags_WidthFixed);
+
+        bool doInvert=e->song.systemVol[selectedPortSet]<0;
+        float vol=fabs(e->song.systemVol[selectedPortSet]);
+
+        ImGui::TableNextRow();
+        ImGui::TableNextColumn();
+        ImGui::Text("%d. %s",selectedPortSet+1,getSystemName(e->song.system[selectedPortSet]));
+        ImGui::TableNextColumn();
+        if (ImGui::Checkbox("Invert",&doInvert)) {
+          e->song.systemVol[selectedPortSet]=-e->song.systemVol[selectedPortSet];
+          MARK_MODIFIED;
+        }
+
+        ImGui::TableNextRow();
+        ImGui::TableNextColumn();
+        ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+        if (CWSliderFloat("##Volume",&vol,0,2)) {
+          if (doInvert) {
+            if (vol<0.0001) vol=0.0001;
+          }
+          if (vol<0) vol=0;
+          if (vol>10) vol=10;
+          e->song.systemVol[selectedPortSet]=(doInvert)?-vol:vol;
+          MARK_MODIFIED;
+        } rightClickable
+        ImGui::TableNextColumn();
+        ImGui::Text("Volume");
+
+        ImGui::TableNextRow();
+        ImGui::TableNextColumn();
+        ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+        if (CWSliderFloat("##Panning",&e->song.systemPan[selectedPortSet],-1.0f,1.0f)) {
+          if (e->song.systemPan[selectedPortSet]<-1.0f) e->song.systemPan[selectedPortSet]=-1.0f;
+          if (e->song.systemPan[selectedPortSet]>1.0f) e->song.systemPan[selectedPortSet]=1.0f;
+          MARK_MODIFIED;
+        } rightClickable
+        ImGui::TableNextColumn();
+        ImGui::Text("Panning");
+
+        ImGui::TableNextRow();
+        ImGui::TableNextColumn();
+        ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+        if (CWSliderFloat("##FrontRear",&e->song.systemPanFR[selectedPortSet],-1.0f,1.0f)) {
+          if (e->song.systemPanFR[selectedPortSet]<-1.0f) e->song.systemPanFR[selectedPortSet]=-1.0f;
+          if (e->song.systemPanFR[selectedPortSet]>1.0f) e->song.systemPanFR[selectedPortSet]=1.0f;
+          MARK_MODIFIED;
+        } rightClickable
+        ImGui::TableNextColumn();
+        ImGui::Text("Front/Rear");
+
+        ImGui::EndTable();
+      }
+    } else {
+      if (ImGui::Checkbox("Automatic patchbay",&e->song.patchbayAuto)) {
+        if (e->song.patchbayAuto) e->autoPatchbayP();
         MARK_MODIFIED;
       }
-      ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x-(50.0f*dpiScale));
-      if (CWSliderScalar("Volume",ImGuiDataType_S8,&vol,&_ZERO,&_ONE_HUNDRED_TWENTY_SEVEN)) {
-        e->song.systemVol[i]=(e->song.systemVol[i]&128)|vol;
-        MARK_MODIFIED;
-      } rightClickable
-      ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x-(50.0f*dpiScale));
-      if (CWSliderScalar("Panning",ImGuiDataType_S8,&e->song.systemPan[i],&_MINUS_ONE_HUNDRED_TWENTY_SEVEN,&_ONE_HUNDRED_TWENTY_SEVEN)) {
-        MARK_MODIFIED;
-      } rightClickable
-
-      ImGui::PopID();
+      ImGui::Checkbox("Display hidden ports",&displayHiddenPorts);
+      ImGui::Checkbox("Display internal",&displayInternalPorts);
+      ImGui::Dummy(ImVec2(1.0f,ImGui::GetFrameHeightWithSpacing()));
     }
+
+    hoveredPortSet=0x1fff;
+    hoveredSubPort=-1;
+
+    if (ImGui::BeginChild("Patchbay",ImVec2(0,0),true)) {
+      ImDrawList* dl=ImGui::GetWindowDrawList();
+      ImVec2 topPos=ImGui::GetCursorPos();
+      ImVec2 sysSize=calcPortSetSize("System",displayHiddenPorts?DIV_MAX_OUTPUTS:e->getAudioDescGot().outChans,0);
+      topPos.x+=ImGui::GetContentRegionAvail().x-sysSize.x;
+      if (ImGui::GetContentRegionAvail().y>sysSize.y) topPos.y+=(ImGui::GetContentRegionAvail().y-sysSize.y)*0.5+ImGui::GetScrollY();
+
+      if (ImGui::IsWindowHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) selectedPortSet=0x1fff;
+
+      if (portDragActive) {
+        dl->AddLine(subPortPos,ImGui::GetMousePos(),ImGui::GetColorU32(uiColors[GUI_COLOR_PATCHBAY_CONNECTION]),2.0f*dpiScale);
+      }
+
+      for (int i=0; i<e->song.systemLen; i++) {
+        DivDispatch* dispatch=e->getDispatch(i);
+        if (dispatch==NULL) continue;
+        int outputs=dispatch->getOutputCount();
+        if (portSet(fmt::sprintf("%d. %s",i+1,getSystemName(e->song.system[i])),i,0,outputs,0,outputs,selectedSubPort,portPos)) {
+          selectedPortSet=i;
+          if (selectedSubPort>=0) {
+            portDragActive=true;
+            ImGui::InhibitInertialScroll();
+            try {
+              subPortPos=portPos.at((selectedPortSet<<4)|selectedSubPort);
+            } catch (std::out_of_range& e) {
+              portDragActive=false;
+            }
+          }
+        }
+      }
+
+      // metronome/sample preview
+      if (displayInternalPorts) {
+        if (portSet("Sample Preview",0xffd,0,1,0,1,selectedSubPort,portPos)) {
+          selectedPortSet=0xffd;
+          if (selectedSubPort>=0) {
+            portDragActive=true;
+            ImGui::InhibitInertialScroll();
+            try {
+              subPortPos=portPos.at((selectedPortSet<<4)|selectedSubPort);
+            } catch (std::out_of_range& e) {
+              portDragActive=false;
+            }
+          }
+        }
+        if (portSet("Metronome",0xffe,0,1,0,1,selectedSubPort,portPos)) {
+          selectedPortSet=0xffe;
+          if (selectedSubPort>=0) {
+            portDragActive=true;
+            ImGui::InhibitInertialScroll();
+            try {
+              subPortPos=portPos.at((selectedPortSet<<4)|selectedSubPort);
+            } catch (std::out_of_range& e) {
+              portDragActive=false;
+            }
+          }
+        }
+      }
+
+      ImGui::SetCursorPos(topPos);
+      if (portSet("System",0x1000,displayHiddenPorts?DIV_MAX_OUTPUTS:e->getAudioDescGot().outChans,0,e->getAudioDescGot().outChans,0,selectedSubPort,portPos)) {
+        selectedPortSet=0x1000;
+        if (selectedSubPort>=0) {
+          portDragActive=true;
+          ImGui::InhibitInertialScroll();
+          try {
+            subPortPos=portPos.at((selectedPortSet<<4)|selectedSubPort);
+          } catch (std::out_of_range& e) {
+            portDragActive=false;
+          }
+        }
+      }
+
+      if (portDragActive) {
+        if (ImGui::IsMouseReleased(ImGuiMouseButton_Left)) {
+          portDragActive=false;
+          if (hoveredPortSet!=0x1fff && hoveredSubPort>=0 && selectedPortSet!=hoveredPortSet) {
+            unsigned int src=(selectedPortSet<<4)|selectedSubPort;
+            unsigned int dest=(hoveredPortSet<<4)|hoveredSubPort;
+
+            if (src&0x10000) {
+              src^=dest;
+              dest^=src;
+              src^=dest;
+            }
+
+            src&=0xffff;
+            dest&=0xffff;
+
+            if (!e->patchConnect(src,dest)) {
+              e->patchDisconnect(src,dest);
+            }
+            MARK_MODIFIED;
+          }
+        }
+      }
+
+      // draw connections
+      for (unsigned int i: e->song.patchbay) {
+        if ((i>>20)==selectedPortSet) continue;
+        try {
+          ImVec2 portSrc=portPos.at(i>>16);
+          ImVec2 portDest=portPos.at(0x10000|(i&0xffff));
+          dl->AddLine(portSrc,portDest,ImGui::GetColorU32(uiColors[GUI_COLOR_PATCHBAY_CONNECTION_BG]),2.0f*dpiScale);
+        } catch (std::out_of_range& e) {
+        }
+      }
+
+      // foreground
+      for (unsigned int i: e->song.patchbay) {
+        if ((i>>20)!=selectedPortSet) continue;
+        try {
+          ImVec2 portSrc=portPos.at(i>>16);
+          ImVec2 portDest=portPos.at(0x10000|(i&0xffff));
+          dl->AddLine(portSrc,portDest,ImGui::GetColorU32(uiColors[GUI_COLOR_PATCHBAY_CONNECTION]),2.0f*dpiScale);
+        } catch (std::out_of_range& e) {
+        }
+      }
+    }
+    if (ImGui::BeginPopup("SubPortOptions",ImGuiWindowFlags_NoMove|ImGuiWindowFlags_AlwaysAutoResize|ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoSavedSettings)) {
+      if (ImGui::MenuItem("disconnect all")) {
+        e->patchDisconnectAll(selectedPortSet);
+        MARK_MODIFIED;
+      }
+      ImGui::EndPopup();
+    }
+    ImGui::EndChild();
   }
   if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) curWindow=GUI_WINDOW_MIXER;
   ImGui::End();
diff --git a/src/gui/osc.cpp b/src/gui/osc.cpp
index 7791e8e5..7f414221 100644
--- a/src/gui/osc.cpp
+++ b/src/gui/osc.cpp
@@ -49,14 +49,19 @@ void FurnaceGUI::readOsc() {
   int oscReadPos=(writePos-winSize)&0x7fff;
   for (int i=0; i<512; i++) {
     int pos=(oscReadPos+(i*winSize/512))&0x7fff;
-    oscValues[i]=(e->oscBuf[0][pos]+e->oscBuf[1][pos])*0.5f;
+    oscValues[i]=0;
+    for (int j=0; j<e->getAudioDescGot().outChans; j++) {
+      oscValues[i]+=e->oscBuf[j][pos];
+    }
+    oscValues[i]/=e->getAudioDescGot().outChans;
+
     if (oscValues[i]>0.001f || oscValues[i]<-0.001f) {
       WAKE_UP;
     }
   }
 
   float peakDecay=0.05f*60.0f*ImGui::GetIO().DeltaTime;
-  for (int i=0; i<2; i++) {
+  for (int i=0; i<e->getAudioDescGot().outChans; i++) {
     peak[i]*=1.0-peakDecay;
     if (peak[i]<0.0001) {
       peak[i]=0.0;
diff --git a/src/gui/presets.cpp b/src/gui/presets.cpp
index dfdd59a8..5c5c2b7d 100644
--- a/src/gui/presets.cpp
+++ b/src/gui/presets.cpp
@@ -45,39 +45,39 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Game consoles","let's play some chiptune making games!");
   ENTRY(
     "Sega Genesis", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Genesis (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Genesis (CSM)", {
-      CH(DIV_SYSTEM_YM2612_CSM, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612_CSM, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Genesis (DualPCM)", {
-      CH(DIV_SYSTEM_YM2612_DUALPCM, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612_DUALPCM, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Genesis (DualPCM, extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_DUALPCM_EXT, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612_DUALPCM_EXT, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Genesis (with Sega CD)", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, ""),
-      CH(DIV_SYSTEM_RF5C68, 64, 0,
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, ""),
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0,
         "clockSel=2\n"
         "chipType=1\n"
       )
@@ -85,9 +85,9 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Sega Genesis (extended channel 3 with Sega CD)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, ""),
-      CH(DIV_SYSTEM_RF5C68, 64, 0,
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, ""),
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0,
         "clockSel=2\n"
         "chipType=1\n"
       )
@@ -95,9 +95,9 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Sega Genesis (CSM with Sega CD)", {
-      CH(DIV_SYSTEM_YM2612_CSM, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, ""),
-      CH(DIV_SYSTEM_RF5C68, 64, 0,
+      CH(DIV_SYSTEM_YM2612_CSM, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, ""),
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0,
         "clockSel=2\n"
         "chipType=1\n"
       )
@@ -105,39 +105,39 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Sega Master System", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega Master System (with FM expansion)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_OPLL, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega Master System (with FM expansion in drums mode)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega Game Gear", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=3")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=3")
     }
   );
   ENTRY(
     "Game Boy", {
-      CH(DIV_SYSTEM_GB, 64, 0, "")
+      CH(DIV_SYSTEM_GB, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Neo Geo Pocket", {
-      CH(DIV_SYSTEM_T6W28, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, -127, 
+      CH(DIV_SYSTEM_T6W28, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, -1.0f, 
         "rate=11025\n"
         "outDepth=5\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 127, 
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 1.0f, 
         "rate=11025\n"
         "outDepth=5\n"
       ) // don't know what the actual sample rate is
@@ -145,106 +145,106 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "NEC PC Engine/TurboGrafx-16", {
-      CH(DIV_SYSTEM_PCE, 64, 0, "")
+      CH(DIV_SYSTEM_PCE, 1.0f, 0, "")
     }
   );
   ENTRY(
     "NES", {
-      CH(DIV_SYSTEM_NES, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom with Konami VRC6", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_VRC6, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_VRC6, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom with Konami VRC7", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_VRC7, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_VRC7, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom with MMC5", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_MMC5, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_MMC5, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom with Sunsoft 5B", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=2")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=2")
     }
   );
   ENTRY(
     "Famicom with Namco 163", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_N163, 64, 0, "channels=7")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_N163, 1.0f, 0, "channels=7")
     }
   );
   ENTRY(
     "Famicom Disk System", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_FDS, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_FDS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "SNES", {
-      CH(DIV_SYSTEM_SNES, 64, 0, "")
+      CH(DIV_SYSTEM_SNES, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Mattel Intellivision", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=3")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=3")
     }
   );
   ENTRY(
     "Vectrex", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=4")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=4")
     }
   );
   ENTRY(
     "Neo Geo AES", {
-      CH(DIV_SYSTEM_YM2610_FULL, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2610_FULL, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "Neo Geo AES (extended channel 2)", {
-      CH(DIV_SYSTEM_YM2610_FULL_EXT, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2610_FULL_EXT, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "Atari 2600/7800", {
-      CH(DIV_SYSTEM_TIA, 64, 0, "")
+      CH(DIV_SYSTEM_TIA, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Atari 7800 + Ballblazer/Commando", {
-      CH(DIV_SYSTEM_TIA, 64, 0, ""),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "")
+      CH(DIV_SYSTEM_TIA, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Atari Lynx", {
-      CH(DIV_SYSTEM_LYNX, 64, 0, "")
+      CH(DIV_SYSTEM_LYNX, 1.0f, 0, "")
     }
   );
   ENTRY(
     "WonderSwan", {
-      CH(DIV_SYSTEM_SWAN, 64, 0, "")
+      CH(DIV_SYSTEM_SWAN, 1.0f, 0, "")
     },
     "tickRate=75.47169811320754716981"
   );
   ENTRY(
     "Virtual Boy", {
-      CH(DIV_SYSTEM_VBOY, 64, 0, "")
+      CH(DIV_SYSTEM_VBOY, 1.0f, 0, "")
     },
     "tickRate=50.2734877734878"
   );
   ENTRY(
     "Gamate", {
-      CH(DIV_SYSTEM_AY8910, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0,
         "clockSel=9\n"
         "chipType=0\n"
         "stereo=true\n"
@@ -253,7 +253,7 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Pokémon Mini", {
-      CH(DIV_SYSTEM_POKEMINI, 32, 0, "")
+      CH(DIV_SYSTEM_POKEMINI, 0.5f, 0, "")
     }
   );
   CATEGORY_END;
@@ -261,132 +261,132 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Computers","let's get to work on chiptune today.");
   ENTRY(
     "Commodore PET", {
-      CH(DIV_SYSTEM_PET, 64, 0, "")
+      CH(DIV_SYSTEM_PET, 1.0f, 0, "")
     },
     "tickRate=50"
   );
   ENTRY(
     "Commodore VIC-20", {
-      CH(DIV_SYSTEM_VIC20, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_VIC20, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "Commodore 64 (6581 SID)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (8580 SID)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (6581 SID + Sound Expander)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL, 64, 0, "")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (6581 SID + Sound Expander in drums mode)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (8580 SID + Sound Expander)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL, 64, 0, "")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (8580 SID + Sound Expander in drums mode)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (6581 SID + FM-YAM)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL2, 64, 0, "")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (6581 SID + FM-YAM in drums mode)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (8580 SID + FM-YAM)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL2, 64, 0, "")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (8580 SID + FM-YAM in drums mode)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Amiga", {
-      CH(DIV_SYSTEM_AMIGA, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_AMIGA, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50"
   );
   ENTRY(
     "MSX", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=0\nchipType=1")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=0\nchipType=1")
     }
   );
   ENTRY(
     "MSX + SFG-01", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_YM2151, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + MSX-AUDIO", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_Y8950, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + MSX-AUDIO (drums mode)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + MSX-MUSIC", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_OPLL, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + MSX-MUSIC (drums mode)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + Darky", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_AY8930, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_AY8930, 1.0f, 0,
         "clockSel=11\n"
         "halfClock=true\n"
       ), // 3.58MHz
-      CH(DIV_SYSTEM_AY8930, 64, 0,
+      CH(DIV_SYSTEM_AY8930, 1.0f, 0,
         "clockSel=11\n"
         "halfClock=true\n"
       ) // 3.58MHz or 3.6MHz selectable via register
@@ -395,52 +395,52 @@ void FurnaceGUI::initSystemPresets() {
   );
     ENTRY(
     "MSX + Playsoniq", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_SMS, 64, 0, ""), // Sega VDP
-      CH(DIV_SYSTEM_C64_8580, 64, 0, ""),
-      CH(DIV_SYSTEM_SCC_PLUS, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""), // Sega VDP
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SCC_PLUS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + SCC", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_SCC, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_SCC, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + SCC+", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_SCC_PLUS, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_SCC_PLUS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + Neotron", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_YM2610_FULL, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_YM2610_FULL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + Neotron (extended channel 2)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_YM2610_FULL_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_YM2610_FULL_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + Neotron (with YM2610B)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_YM2610B, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_YM2610B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + Neotron (with YM2610B; extended channel 3)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_YM2610B_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_YM2610B_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "MSX + SIMPL", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=55930\n"
         "outDepth=7\n"
       ) // variable rate, Mono DAC
@@ -448,435 +448,435 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "NEC PC-88 (with PC-8801-10)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15"), // external
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15") // ""
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15"), // external
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15") // ""
     }
   );
   ENTRY(
     "NEC PC-88 (with PC-8801-11)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-88 (with PC-8801-11; extended channel 3)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-88 (with PC-8801-23)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-88 (with PC-8801-23; extended channel 3)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-88 (with HMB-20 HIBIKI-8800)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2") // external; 4.0000MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2") // external; 4.0000MHz
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-10)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15"), // external
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15") // ""
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15"), // external
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15") // ""
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-10; extended channel 3)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15"), // external
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15") // ""
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15"), // external
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15") // ""
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-11)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-11; extended channel 3 on internal OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-11; extended channel 3 on external OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-11; extended channel 3 on both OPNs)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-23)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-23; extended channel 3 on internal OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-23; extended channel 3 on external OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with PC-8801-23; extended channel 3 on both OPNs)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with HMB-20 HIBIKI-8800)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2") // external; 4.0000MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2") // external; 4.0000MHz
     }
   );
   ENTRY(
     "NEC PC-8801mk2SR (with HMB-20 HIBIKI-8800; extended channel 3)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2") // external; 4.0000MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2") // external; 4.0000MHz
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-10)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15"), // external
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15") // ""
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15"), // external
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15") // ""
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-10; extended channel 3)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=4"), // internal
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15"), // external
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=15") // ""
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=4"), // internal
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15"), // external
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=15") // ""
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-11)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-11; extended channel 3 on internal OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-11; extended channel 3 on external OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-11; extended channel 3 on both OPNs)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-23)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-23; extended channel 3 on internal OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-23; extended channel 3 on external OPN)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with PC-8801-23; extended channel 3 on both OPNs)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1") // external
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1") // external
     }
   );
   ENTRY(
     "NEC PC-8801FA (with HMB-20 HIBIKI-8800)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2") // external; 4.0000MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2") // external; 4.0000MHz
     }
   );
   ENTRY(
     "NEC PC-8801FA (with HMB-20 HIBIKI-8800; extended channel 3)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"), // internal
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2") // external; 4.0000MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"), // internal
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2") // external; 4.0000MHz
     }
   );
   ENTRY(
     "NEC PC-98 (with PC-9801-26/K)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"), // 3.9936MHz but some compatible card has 4MHz
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"), // 3.9936MHz but some compatible card has 4MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with PC-9801-26/K; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"), // 3.9936MHz but some compatible card has 4MHz
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"), // 3.9936MHz but some compatible card has 4MHz
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra in drums mode)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra in drums mode; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra V)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra V; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra V in drums mode)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Orchestra V in drums mode; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=4"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=4"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with PC-9801-86)", { // -73 also has OPNA
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, // 2x 16-bit Burr Brown DAC
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, // 2x 16-bit Burr Brown DAC
         "rate=44100\n"
         "outDepth=15\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
       ),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with PC-9801-86; extended channel 3)", { // -73 also has OPNA
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
       ),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with PC-9801-73)", {
-      CH(DIV_SYSTEM_YM2608, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with PC-9801-73; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Blaster 16 for PC-9800 w/PC-9801-26/K compatible)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
         "stereo=true\n"
       ),
-      CH(DIV_SYSTEM_OPL3, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_OPL3, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Blaster 16 for PC-9800 w/PC-9801-26/K compatible; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
         "stereo=true\n"
       ),
-      CH(DIV_SYSTEM_OPL3, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_OPL3, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Blaster 16 for PC-9800 w/PC-9801-26/K compatible in drums mode)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
         "stereo=true\n"
       ),
-      CH(DIV_SYSTEM_OPL3_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_OPL3_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "NEC PC-98 (with Sound Blaster 16 for PC-9800 w/PC-9801-26/K compatible in drums mode; extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=44100\n"
         "outDepth=15\n"
         "stereo=true\n"
       ),
-      CH(DIV_SYSTEM_OPL3_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_OPL3_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "ZX Spectrum (48K)", {
-      CH(DIV_SYSTEM_SFX_BEEPER, 64, 0, "")
+      CH(DIV_SYSTEM_SFX_BEEPER, 1.0f, 0, "")
     }
   );
   ENTRY(
     "ZX Spectrum (128K)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1") //beeper was also included
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1") //beeper was also included
     }
   );
   ENTRY(
     "ZX Spectrum (128K) with TurboSound FM", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "ZX Spectrum (128K) with TurboSound FM (extended channel 3 on first OPN)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "ZX Spectrum (128K) with TurboSound FM (extended channel 3 on second OPN)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "ZX Spectrum (128K) with TurboSound FM (extended channel 3 on both OPNs)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "ZX Spectrum (128K) with TurboSound", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1"), // or YM2149
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=1") // or YM2149
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1"), // or YM2149
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1") // or YM2149
     }
   );
   ENTRY(
     "Amstrad CPC", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=5")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=5")
     }
   );
   ENTRY(
     "Atari 800", {
-      CH(DIV_SYSTEM_POKEY, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50"
   );
   ENTRY(
     "Atari 800 (stereo)", {
-      CH(DIV_SYSTEM_POKEY, 64, -127, "clockSel=1"),
-      CH(DIV_SYSTEM_POKEY, 64, 127, "clockSel=1"),
+      CH(DIV_SYSTEM_POKEY, 1.0f, -1.0f, "clockSel=1"),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 1.0f, "clockSel=1"),
     },
     "tickRate=50"
   );
   ENTRY(
     "Atari ST", {
-      CH(DIV_SYSTEM_AY8910, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0,
         "clockSel=3\n"
         "chipType=1\n"
       )
@@ -884,15 +884,15 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Atari STE", {
-      CH(DIV_SYSTEM_AY8910, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0,
         "clockSel=3\n"
         "chipType=1\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=50668\n"
         "outDepth=7\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=50668\n"
         "outDepth=7\n"
       )
@@ -900,12 +900,12 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "SAM Coupé", {
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "")
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "")
     }
   );
   ENTRY(
     "BBC Micro", {
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=2\n"
         "chipType=4\n" // SN76489A 4MHz
       )
@@ -913,57 +913,57 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "PC (barebones)", {
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "IBM PCjr", {
       // it can be enable sound output at once
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=5") // SN76496
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=5") // SN76496
     }
   );
   ENTRY(
     "Tandy 1000", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=5"), // NCR 8496 or SN76496 or Tandy PSSJ(with 8 bit DAC)
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=5"), // NCR 8496 or SN76496 or Tandy PSSJ(with 8 bit DAC)
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Covox Sound Master", {
-      CH(DIV_SYSTEM_AY8930, 64, 0, "clockSel=3"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_AY8930, 1.0f, 0, "clockSel=3"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + SSI 2001", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Game Blaster", {
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + AdLib", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + AdLib (drums mode)", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Sound Blaster", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=22050\n"
         "outDepth=7\n"
       )
@@ -971,9 +971,9 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "PC + AdLib/Sound Blaster (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, ""),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=22050\n"
         "outDepth=7\n"
       )
@@ -981,132 +981,132 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "PC + Sound Blaster w/Game Blaster Compatible", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""),
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=22050\n"
         "outDepth=7\n"
       ),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Sound Blaster w/Game Blaster Compatible (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, ""),
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=22050\n"
         "outDepth=7\n"
       ),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Sound Blaster Pro", {
-      CH(DIV_SYSTEM_OPL2, 64, -127, ""),
-      CH(DIV_SYSTEM_OPL2, 64, 127, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL2, 1.0f, -1.0f, ""),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 1.0f, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=22050\n"
         "outDepth=7\n"
         "stereo=true\n"
       ), //alternatively 44.1 khz mono
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Sound Blaster Pro (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, -127, ""),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 127, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, -1.0f, ""),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 1.0f, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=22050\n"
         "outDepth=7\n"
         "stereo=true\n"
       ), //alternatively 44.1 khz mono
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Sound Blaster Pro 2", {
-      CH(DIV_SYSTEM_OPL3, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL3, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=44100\n"
         "outDepth=15\n"
         "stereo=true\n"
       ),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + Sound Blaster Pro 2 (drums mode)", {
-      CH(DIV_SYSTEM_OPL3_DRUMS, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_OPL3_DRUMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=44100\n"
         "outDepth=15\n"
         "stereo=true\n"
       ),
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + PC-FXGA", {
-      CH(DIV_SYSTEM_PCE, 64, 0, ""), // HuC6230 (WSG from HuC6280 but with built in 2 OKI ADPCM playback engines)
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_PCE, 1.0f, 0, ""), // HuC6230 (WSG from HuC6280 but with built in 2 OKI ADPCM playback engines)
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC + SAAYM", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.58MHz or 4MHz selectable via jumper
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"), // 7.16MHz or 8MHz selectable via jumper
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "clockSel=1"), // ""
-      CH(DIV_SYSTEM_PCSPKR, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.58MHz or 4MHz selectable via jumper
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"), // 7.16MHz or 8MHz selectable via jumper
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "clockSel=1"), // ""
+      CH(DIV_SYSTEM_PCSPKR, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sharp X1", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=3")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=3")
     }
   );
   ENTRY(
     "Sharp X1 + FM Addon", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=3"),
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=3"),
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "Sharp X68000", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_MSM6258, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_MSM6258, 1.0f, 0, "")
     }
   );
   ENTRY(
     "FM Towns", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2"), // YM3438
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2"), // YM3438
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "")
     }
   );
   ENTRY(
     "FM Towns (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2"), // YM3438
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2"), // YM3438
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "")
     }
   );
   ENTRY(
     "FM Towns (CSM)", {
-      CH(DIV_SYSTEM_YM2612_CSM, 64, 0, "clockSel=2"), // YM3438
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612_CSM, 1.0f, 0, "clockSel=2"), // YM3438
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Commander X16", {
-      CH(DIV_SYSTEM_VERA, 64, 0, ""),
-      CH(DIV_SYSTEM_YM2151, 32, 0, "")
+      CH(DIV_SYSTEM_VERA, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YM2151, 0.5f, 0, "")
     }
   );
   ENTRY(
     "TI-99/4A", {
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=6\n"
         "chipType=8\n" // SN94624 447KHz
       )
@@ -1117,143 +1117,143 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Arcade systems","INSERT COIN");
   ENTRY(
     "Pong", {
-      CH(DIV_SYSTEM_PONG, 64, 0, "")
+      CH(DIV_SYSTEM_PONG, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Bally Midway MCR", {
       // SSIO sound board
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=3"), // 2MHz
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=3") // 2MHz
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=3"), // 2MHz
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=3") // 2MHz
       // additional sound boards, mostly software controlled DAC
     }
   );
   ENTRY(
     "Williams/Midway Y/T unit w/ADPCM sound board", {
       // ADPCM sound board
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=15625\n"
         "outDepth=7\n"
       ), // variable via OPM timer?
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "")
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Konami Gyruss", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "")
       // additional discrete sound logics
     }
   );
   ENTRY(
     "Konami Bubble System", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""),
-      CH(DIV_SYSTEM_BUBSYS_WSG, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_BUBSYS_WSG, 1.0f, 0, "")
       // VLM5030 exists but not used for music at all
     }
   );
   ENTRY(
     "Konami MX5000", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami Battlantis", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=3")  // ""
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=3")  // ""
     }
   );
   ENTRY(
     "Konami Battlantis (drums mode on first OPL2)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=3") // ""
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=3") // ""
     }
   );
   ENTRY(
     "Konami Battlantis (drums mode on second OPL2)", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=3") // ""
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=3") // ""
     }
   );
   ENTRY(
     "Konami Battlantis (drums mode on both OPL2s)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=3") // ""
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=3") // ""
     }
   );
   ENTRY(
     "Konami Fast Lane", {
-      CH(DIV_SYSTEM_K007232, 64, 0, ""),  // 3.58MHz
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, ""),  // 3.58MHz
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami Chequered Flag", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_K007232, 64, 0, "stereo=true"),  // ""
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "stereo=true"),  // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami Haunted Castle", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_SCC, 64, 0, ""),  // ""
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_SCC, 1.0f, 0, ""),  // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami Haunted Castle (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_SCC, 64, 0, ""), // ""
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_SCC, 1.0f, 0, ""), // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami Hot Chase", {
-      CH(DIV_SYSTEM_K007232, 64, 0, "stereo=true"),  // 3.58MHz
-      CH(DIV_SYSTEM_K007232, 64, 0, "stereo=true"),  // ""
-      CH(DIV_SYSTEM_K007232, 64, 0, "stereo=true")  // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "stereo=true"),  // 3.58MHz
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "stereo=true"),  // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "stereo=true")  // ""
     }
   );
   ENTRY(
     "Konami S.P.Y.", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_K007232, 64, 0, ""),  // ""
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, ""),  // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami S.P.Y. (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_K007232, 64, 0, ""), // ""
-      CH(DIV_SYSTEM_K007232, 64, 0, "")  // ""
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, ""), // ""
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")  // ""
     }
   );
   ENTRY(
     "Konami Hexion", {
-      CH(DIV_SYSTEM_SCC, 64, 0, "clockSel=2"), // 1.5MHz (3MHz input)
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_SCC, 1.0f, 0, "clockSel=2"), // 1.5MHz (3MHz input)
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "Sega Kyugo", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=14"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=14")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=14"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=14")
     }
   );
   ENTRY(
     "Sega System 1", {
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=2\n"
         "chipType=4\n"
       ), // SN76489A 4MHz
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=5\n"
         "chipType=4\n"
       ) // SN76489A 2MHz
@@ -1261,46 +1261,46 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Sega System E", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega System E (with FM expansion)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_OPLL, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega System E (with FM expansion in drums mode)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega Hang-On", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_SEGAPCM, 64, 0, "") // discrete logics, 62.5KHz output rate
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_SEGAPCM, 1.0f, 0, "") // discrete logics, 62.5KHz output rate
     }
   );
   ENTRY(
     "Sega Hang-On (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_SEGAPCM, 64, 0, "") // discrete logics, 62.5KHz output rate
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_SEGAPCM, 1.0f, 0, "") // discrete logics, 62.5KHz output rate
     }
   );
   ENTRY(
     "Sega OutRun/X Board", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_SEGAPCM, 64, 0, "") // ASIC, 31.25KHz output rate
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_SEGAPCM, 1.0f, 0, "") // ASIC, 31.25KHz output rate
     }
   );
   ENTRY(
     "Sega System 24", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=61500\n"
         "outDepth=7\n"
       ) // software controlled, variable rate via configurable timers
@@ -1308,68 +1308,68 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Sega System 18", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2"), // discrete 8MHz YM3438
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=1") // 10MHz
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2"), // discrete 8MHz YM3438
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=1") // 10MHz
     }
   );
   ENTRY(
     "Sega System 18 (extended channel 3 on first OPN2C)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2"), // discrete 8MHz YM3438
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=1") // 10MHz
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2"), // discrete 8MHz YM3438
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=1") // 10MHz
     }
   );
   ENTRY(
     "Sega System 18 (extended channel 3 on second OPN2C)", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2"), // discrete 8MHz YM3438
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=1") // 10MHz
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2"), // discrete 8MHz YM3438
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=1") // 10MHz
     }
   );
   ENTRY(
     "Sega System 18 (extended channel 3 on both OPN2Cs)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2"), // discrete 8MHz YM3438
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=1") // 10MHz
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2"), // discrete 8MHz YM3438
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=1") // 10MHz
     }
   );
   ENTRY(
     "Sega System 32", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=4"), // discrete 8.05MHz YM3438
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=4"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=2") // 12.5MHz
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=4"), // discrete 8.05MHz YM3438
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=4"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=2") // 12.5MHz
     }
   );
   ENTRY(
     "Sega System 32 (extended channel 3 on first OPN2C)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=4"), // discrete 8.05MHz YM3438
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=4"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=2") // 12.5MHz
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=4"), // discrete 8.05MHz YM3438
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=4"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=2") // 12.5MHz
     }
   );
   ENTRY(
     "Sega System 32 (extended channel 3 on second OPN2C)", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=4"), // discrete 8.05MHz YM3438
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=4"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=2") // 12.5MHz
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=4"), // discrete 8.05MHz YM3438
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=4"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=2") // 12.5MHz
     }
   );
   ENTRY(
     "Sega System 32 (extended channel 3 on both OPN2Cs)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=4"), // discrete 8.05MHz YM3438
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=4"), // ^^
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "clockSel=2") // 12.5MHz
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=4"), // discrete 8.05MHz YM3438
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=4"), // ^^
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "clockSel=2") // 12.5MHz
     }
   );
   ENTRY(
     "Capcom Exed Eyes", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=4"), // 1.5MHz
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=4"), // 1.5MHz
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=4\n"
         "chipType=1\n"
       ), // SN76489 3MHz
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=4\n"
         "chipType=1\n"
       ) // SN76489 3MHz
@@ -1377,66 +1377,66 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Capcom Arcade", { // 1943, Side arms, etc
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 4 or 1.5MHz; various per games
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 4 or 1.5MHz; various per games
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5")
     }
   );
   ENTRY(
     "Capcom Arcade (extended channel 3 on first OPN)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"),
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"),
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5")
     }
   );
   ENTRY(
     "Capcom Arcade (extended channel 3 on second OPN)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5")
     }
   );
   ENTRY(
     "Capcom Arcade (extended channel 3 on both OPNs)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"),
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"),
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5")
     }
   );
   ENTRY(
     "Capcom CPS-1", { 
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.58MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.58MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Capcom CPS-2 (QSound)", {
-      CH(DIV_SYSTEM_QSOUND, 64, 0, "")
+      CH(DIV_SYSTEM_QSOUND, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Jaleco Ginga NinkyouDen", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"), // 1.79MHz
-      CH(DIV_SYSTEM_Y8950, 64, 0, "") // 3.58MHz
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"), // 1.79MHz
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "") // 3.58MHz
     }
   );
   ENTRY(
     "Jaleco Ginga NinkyouDen (drums mode)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1"), // 1.79MHz
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "") // 3.58MHz
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1"), // 1.79MHz
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "") // 3.58MHz
     }
   );
   ENTRY(
     "Jaleco Mega System 1", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, "clockSel=1"), // 3.5MHz (7MHz / 2)
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=2") // 4MHz
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "clockSel=1"), // 3.5MHz (7MHz / 2)
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=2") // 4MHz
     }
   );
   ENTRY(
     "NMK 16-bit Arcade", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 1.5MHz; optional
-      CH(DIV_SYSTEM_MSM6295, 64, 0,
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 1.5MHz; optional
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0,
         "clockSel=2\n"
         "rateSel=true\n"
       ), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0,
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0,
         "clockSel=2\n"
         "rateSel=true\n"
       ) // ^^
@@ -1444,12 +1444,12 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "NMK 16-bit Arcade (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"), // 1.5MHz; optional
-      CH(DIV_SYSTEM_MSM6295, 64, 0,
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"), // 1.5MHz; optional
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0,
         "clockSel=2\n"
         "rateSel=true\n"
       ), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0,
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0,
         "clockSel=2\n"
         "rateSel=true\n"
       ) // ^^
@@ -1457,22 +1457,22 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Kaneko DJ Boy", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, -127, "clockSel=12"), // 1.5MHz, Left output
-      CH(DIV_SYSTEM_MSM6295, 64, 127, "clockSel=12"), // 1.5MHz, Right output
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, -1.0f, "clockSel=12"), // 1.5MHz, Left output
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 1.0f, "clockSel=12"), // 1.5MHz, Right output
     }
   );
   ENTRY(
     "Kaneko DJ Boy (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, -127, "clockSel=12"), // 1.5MHz, Left output
-      CH(DIV_SYSTEM_MSM6295, 64, 127, "clockSel=12") // 1.5MHz, Right output
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, -1.0f, "clockSel=12"), // 1.5MHz, Left output
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 1.0f, "clockSel=12") // 1.5MHz, Right output
     }
   );
   ENTRY(
     "Kaneko Air Buster", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0,
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0,
         "clockSel=13\n"
         "rateSel=true\n"
       ) // 3MHz
@@ -1480,8 +1480,8 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Kaneko Air Buster (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0,
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0,
         "clockSel=13\n"
         "rateSel=true\n"
       ) // 3MHz
@@ -1489,349 +1489,349 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Kaneko Toybox System", {
-      CH(DIV_SYSTEM_AY8910, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0,
         "clockSel=3\n"
         "chipType=1\n"
       ), // YM2149 2MHz
-      CH(DIV_SYSTEM_AY8910, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0,
         "clockSel=3\n"
         "chipType=1\n"
       ), // ^^
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=8") // 2MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=8") // 2MHz
     }
   );
   ENTRY(
     "Kaneko Jackie Chan", {
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "clockSel=3") // 16MHz
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "clockSel=3") // 16MHz
     }
   );
   ENTRY(
     "Super Kaneko Nova System", {
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "clockSel=4") // 16.67MHz (33.33MHz / 2)
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "clockSel=4") // 16.67MHz (33.33MHz / 2)
     }
   );
   ENTRY(
     "Tecmo Ninja Gaiden", { // Ninja Gaiden, Raiga, etc
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1MHz
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1MHz
     }
   );
   ENTRY(
     "Tecmo Ninja Gaiden (extended channel 3 on first OPN)", { // Ninja Gaiden, Raiga, etc
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1MHz
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1MHz
     }
   );
   ENTRY(
     "Tecmo Ninja Gaiden (extended channel 3 on second OPN)", { // Ninja Gaiden, Raiga, etc
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1MHz
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1MHz
     }
   );
   ENTRY(
     "Tecmo Ninja Gaiden (extended channel 3 on both OPNs)", { // Ninja Gaiden, Raiga, etc
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1MHz
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1MHz
     }
   );
   ENTRY(
     "Tecmo System", {
-      CH(DIV_SYSTEM_OPL3, 64, 0, ""),
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, ""),
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=8") // 2MHz
+      CH(DIV_SYSTEM_OPL3, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=8") // 2MHz
     }
   );
   ENTRY(
     "Tecmo System (drums mode)", {
-      CH(DIV_SYSTEM_OPL3_DRUMS, 64, 0, ""),
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, ""),
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=8") // 2MHz
+      CH(DIV_SYSTEM_OPL3_DRUMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=8") // 2MHz
     }
   );
   ENTRY(
     "Seibu Kaihatsu Raiden", { // Raiden, Seibu cup soccer, Zero team, etc
-      CH(DIV_SYSTEM_OPL2, 64, 0, ""), // YM3812 3.58MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1 or 1.023MHz (28.636363MHz / 28); various per games
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, ""), // YM3812 3.58MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1 or 1.023MHz (28.636363MHz / 28); various per games
     }
   );
   ENTRY(
     "Seibu Kaihatsu Raiden (drums mode)", { // Raiden, Seibu cup soccer, Zero team, etc
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, ""), // YM3812 3.58MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1 or 1.023MHz (28.636363MHz / 28); various per games
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, ""), // YM3812 3.58MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1 or 1.023MHz (28.636363MHz / 28); various per games
     }
   );
   ENTRY(
     "Sunsoft Shanghai 3", {
-      CH(DIV_SYSTEM_AY8910, 64, 0,
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0,
         "clockSel=4\n"
         "chipType=1\n"
       ), // YM2149 1.5MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=1") // 1.056MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=1") // 1.056MHz
     }
   );
   ENTRY(
     "Sunsoft Arcade", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2"), // discrete YM3438 8MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=1") // 1.056MHz
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2"), // discrete YM3438 8MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=1") // 1.056MHz
     }
   );
   ENTRY(
     "Sunsoft Arcade (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2"), // discrete YM3438 8MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=1") // 1.056MHz
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2"), // discrete YM3438 8MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=1") // 1.056MHz
     }
   );
   ENTRY(
     "Atari Klax", { 
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=7") // 0.895MHz (3.579545MHz / 4)
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=7") // 0.895MHz (3.579545MHz / 4)
     }
   );
   ENTRY(
     "Atari Rampart", {
-      CH(DIV_SYSTEM_OPLL, 64, 0, ""), // 3.579545MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=14") // 1.193MHz (3.579545MHz / 3)
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, ""), // 3.579545MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=14") // 1.193MHz (3.579545MHz / 3)
     }
   );
   ENTRY(
     "Atari Rampart (drums mode)", { 
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, ""), // 3.579545MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=14") // 1.193MHz (3.579545MHz / 3)
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, ""), // 3.579545MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=14") // 1.193MHz (3.579545MHz / 3)
     }
   );
   ENTRY(
     "Atari JSA IIIs", { 
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.579545MHz
-      CH(DIV_SYSTEM_MSM6295, 64, -127, "clockSel=14"), // 1.193MHz (3.579545MHz / 3), Left output
-      CH(DIV_SYSTEM_MSM6295, 64, 127, "clockSel=14") // 1.193MHz (3.579545MHz / 3), Right output
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.579545MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, -1.0f, "clockSel=14"), // 1.193MHz (3.579545MHz / 3), Left output
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 1.0f, "clockSel=14") // 1.193MHz (3.579545MHz / 3), Right output
     }
   );
   ENTRY(
     "Atari Marble Madness", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Atari Championship Sprint", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_POKEY, 64, 0, ""),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Atari Tetris", {
-      CH(DIV_SYSTEM_POKEY, 64, 0, ""),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "")
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Atari I, Robot", {
-      CH(DIV_SYSTEM_POKEY, 64, 0, "customClock=1512000"),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "customClock=1512000"),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "customClock=1512000"),
-      CH(DIV_SYSTEM_POKEY, 64, 0, "customClock=1512000")
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "customClock=1512000"),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "customClock=1512000"),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "customClock=1512000"),
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "customClock=1512000")
     }
   );
   ENTRY(
     "Data East Karnov", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=3") // 3MHz
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=3") // 3MHz
     }
   );
   ENTRY(
     "Data East Karnov (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=3") // 3MHz
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=3") // 3MHz
     }
   );
   ENTRY(
     "Data East Karnov (drums mode)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=3") // 3MHz
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=3") // 3MHz
     }
   );
   ENTRY(
     "Data East Karnov (extended channel 3; drums mode)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=3") // 3MHz
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=3") // 3MHz
     }
   );
   ENTRY(
     "Data East Arcade", { // Bad dudes, Robocop, etc
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1 to 1.056MHz; various per games or optional
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1 to 1.056MHz; various per games or optional
     }
   );
   ENTRY(
     "Data East Arcade (extended channel 3)", { // Bad dudes, Robocop, etc
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1 to 1.056MHz; various per games or optional
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1 to 1.056MHz; various per games or optional
     }
   );
   ENTRY(
     "Data East Arcade (drums mode)", { // Bad dudes, Robocop, etc
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1 to 1.056MHz; various per games or optional
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1 to 1.056MHz; various per games or optional
     }
   );
   ENTRY(
     "Data East Arcade (extended channel 3; drums mode)", { // Bad dudes, Robocop, etc
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "") // 1 to 1.056MHz; various per games or optional
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "") // 1 to 1.056MHz; various per games or optional
     }
   );
   ENTRY(
     "Data East PCX", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_PCE, 64, 0, "")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_PCE, 1.0f, 0, "")
       // software controlled MSM5205
     }
   );
   ENTRY(
     "Data East PCX (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=5"), // 1.5MHz
-      CH(DIV_SYSTEM_PCE, 64, 0, "")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=5"), // 1.5MHz
+      CH(DIV_SYSTEM_PCE, 1.0f, 0, "")
       // software controlled MSM5205
     }
   );
   ENTRY(
     "Data East Dark Seal", { // Dark Seal, Crude Buster, Vapor Trail, etc
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.580MHz (32.22MHz / 9)
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=2"), // 4.0275MHz (32.22MHz / 8); optional
-      CH(DIV_SYSTEM_MSM6295, 64, 0, ""), // 1.007MHz (32.22MHz / 32)
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=8") // 2.014MHz (32.22MHz / 16); optional
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.580MHz (32.22MHz / 9)
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=2"), // 4.0275MHz (32.22MHz / 8); optional
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, ""), // 1.007MHz (32.22MHz / 32)
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=8") // 2.014MHz (32.22MHz / 16); optional
       // HuC6280 is for control them, internal sound isn't used
     }
   );
   ENTRY(
     "Data East Dark Seal (extended channel 3)", { // Dark Seal, Crude Buster, Vapor Trail, etc
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""), // 3.580MHz (32.22MHz / 9)
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=2"), // 4.0275MHz (32.22MHz / 8); optional
-      CH(DIV_SYSTEM_MSM6295, 64, 0, ""), // 1.007MHz (32.22MHz / 32)
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=8") // 2.014MHz (32.22MHz / 16); optional
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""), // 3.580MHz (32.22MHz / 9)
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=2"), // 4.0275MHz (32.22MHz / 8); optional
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, ""), // 1.007MHz (32.22MHz / 32)
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=8") // 2.014MHz (32.22MHz / 16); optional
       // HuC6280 is for control them, internal sound isn't used
     }
   );
   ENTRY(
     "Data East Deco 156", {
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=0"), // 1 or 1.007MHz (32.22MHz / 32); various per games
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=8") // 1 or 2 or 2.014MHz (32.22MHz / 16); various per games
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=0"), // 1 or 1.007MHz (32.22MHz / 32); various per games
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=8") // 1 or 2 or 2.014MHz (32.22MHz / 16); various per games
     }
   );
   ENTRY(
     "Data East MLC", {
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "clockSel=5") // 14MHz
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "clockSel=5") // 14MHz
     }
   );
   ENTRY(
     "SNK Ikari Warriors", {
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Ikari Warriors (drums mode on first OPL)", {
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Ikari Warriors (drums mode on second OPL)", {
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Ikari Warriors (drums mode on both OPLs)", {
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Triple Z80", {
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Triple Z80 (drums mode on Y8950)", {
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Triple Z80 (drums mode on OPL)", {
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Triple Z80 (drums mode on Y8950 and OPL)", {
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Chopper I", {
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Chopper I (drums mode on Y8950)", {
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Chopper I (drums mode on OPL2)", {
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Chopper I (drums mode on Y8950 and OPL2)", {
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Touchdown Fever", {
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Touchdown Fever (drums mode on OPL)", {
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_Y8950, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Touchdown Fever (drums mode on Y8950)", {
-      CH(DIV_SYSTEM_OPL, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "SNK Touchdown Fever (drums mode on OPL and Y8950)", {
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "clockSel=2"),
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "clockSel=2")
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "clockSel=2"),
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "clockSel=2")
     }
   );
   ENTRY(
     "Alpha denshi Alpha-68K", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPLL, 64, 0, "clockSel=0"), // 3.58MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "clockSel=0"), // 3.58MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=7614\n"
         "outDepth=7\n"
       ) // software controlled 8 bit DAC
@@ -1839,9 +1839,9 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Alpha denshi Alpha-68K (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPLL, 64, 0, "clockSel=0"), // 3.58MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "clockSel=0"), // 3.58MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=7614\n"
         "outDepth=7\n"
       ) // software controlled 8 bit DAC
@@ -1849,9 +1849,9 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Alpha denshi Alpha-68K (drums mode)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, "clockSel=0"), // 3.58MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, "clockSel=0"), // 3.58MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=7614\n"
         "outDepth=7\n"
       ) // software controlled 8 bit DAC
@@ -1859,9 +1859,9 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Alpha denshi Alpha-68K (extended channel 3; drums mode)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=3"), // 3MHz
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, "clockSel=0"), // 3.58MHz
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=3"), // 3MHz
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, "clockSel=0"), // 3.58MHz
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=7614\n"
         "outDepth=7\n"
       ) // software controlled 8 bit DAC
@@ -1869,13 +1869,13 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Alpha denshi Equites", {
-      CH(DIV_SYSTEM_MSM5232, 64, 0, "customClock=6144000"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=14"),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_MSM5232, 1.0f, 0, "customClock=6144000"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=14"),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
          "rate=11025\n" 
          "outDepth=5\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
          "rate=11025\n" 
          "outDepth=5\n"
       ) // don't know what the actual sample rate is
@@ -1883,47 +1883,47 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Neo Geo MVS", {
-      CH(DIV_SYSTEM_YM2610_FULL, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610_FULL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Neo Geo MVS (extended channel 2)", {
-      CH(DIV_SYSTEM_YM2610_FULL_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610_FULL_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Nichibutsu Mag Max", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=13"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=13"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=13")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=13"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=13"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=13")
     }
   );
   ENTRY(
     "Namco (3-channel WSG)", { // Pac-Man, Galaga, Xevious, etc
-      CH(DIV_SYSTEM_NAMCO, 64, 0, "")
+      CH(DIV_SYSTEM_NAMCO, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco Mappy", { // Mappy, Super Pac-Man, Libble Rabble, etc
-      CH(DIV_SYSTEM_NAMCO_15XX, 64, 0, "")
+      CH(DIV_SYSTEM_NAMCO_15XX, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco Pac-Land", { // Pac-Land, Baraduke, Sky kid, etc
-      CH(DIV_SYSTEM_NAMCO_CUS30, 64, 0, "")
+      CH(DIV_SYSTEM_NAMCO_CUS30, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco System 86", { // without expansion board case; Hopping Mappy, etc
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_NAMCO_CUS30, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_NAMCO_CUS30, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco Thunder Ceptor", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_NAMCO_CUS30, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_NAMCO_CUS30, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
         "rate=8000\n"
         "outDepth=7\n"
       ) // M65C02 software driven, correct sample rate?
@@ -1931,13 +1931,13 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Namco System 1", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_NAMCO_CUS30, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_NAMCO_CUS30, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=6000\n"
         "outDepth=7\n"
       ), // sample rate verified from https://github.com/mamedev/mame/blob/master/src/devices/sound/n63701x.cpp
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=6000\n"
         "outDepth=7\n"
       ) // ""
@@ -1945,29 +1945,29 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Taito Arcade", {
-      CH(DIV_SYSTEM_YM2610B, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Taito Arcade (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2610B_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610B_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Taito Metal Soldier Isaac II", {
-      CH(DIV_SYSTEM_MSM5232, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=3"),
-      CH(DIV_SYSTEM_AY8910, 64, 0, "clockSel=3")
+      CH(DIV_SYSTEM_MSM5232, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=3"),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=3")
     }
   );
   ENTRY(
     "Taito The Fairyland Story", {
-      CH(DIV_SYSTEM_MSM5232, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, 
+      CH(DIV_SYSTEM_MSM5232, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, 
          "clockSel=3\n"
          "chipType=1\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
          "rate=11025\n" 
          "outDepth=7\n"
       ) // don't know what the actual sample rate is
@@ -1975,16 +1975,16 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Taito Wyvern F-0", {
-      CH(DIV_SYSTEM_MSM5232, 64, 0, ""),
-      CH(DIV_SYSTEM_AY8910, 64, 0, 
+      CH(DIV_SYSTEM_MSM5232, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, 
          "clockSel=3\n"
          "chipType=1\n"
       ),
-      CH(DIV_SYSTEM_AY8910, 64, 0, 
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, 
          "clockSel=3\n"
          "chipType=1\n"
       ),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, 
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, 
          "rate=11025\n" 
          "outDepth=7\n"
       ) // don't know what the actual sample rate is
@@ -1992,24 +1992,24 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Seta 1", {
-      CH(DIV_SYSTEM_X1_010, 64, 0, "")
+      CH(DIV_SYSTEM_X1_010, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Seta 1 + FM addon", {
-      CH(DIV_SYSTEM_X1_010, 64, 0, ""),
-      CH(DIV_SYSTEM_YM2612, 64, 0, "clockSel=2") // Discrete YM3438
+      CH(DIV_SYSTEM_X1_010, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "clockSel=2") // Discrete YM3438
     }
   );
   ENTRY(
     "Seta 1 + FM addon (extended channel 3)", {
-      CH(DIV_SYSTEM_X1_010, 64, 0, ""),
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "clockSel=2") // Discrete YM3438
+      CH(DIV_SYSTEM_X1_010, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "clockSel=2") // Discrete YM3438
     }
   );
   ENTRY(
     "Seta 2", {
-      CH(DIV_SYSTEM_X1_010, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_X1_010, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
@@ -2019,75 +2019,75 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Cave 68000", {
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "")
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Coreland Cyber Tank", {
-      CH(DIV_SYSTEM_Y8950, 64, -127, ""), // 3.58MHz, Left output
-      CH(DIV_SYSTEM_Y8950, 64, 127, "") // 3.58MHz, Right output
+      CH(DIV_SYSTEM_Y8950, 1.0f, -1.0f, ""), // 3.58MHz, Left output
+      CH(DIV_SYSTEM_Y8950, 1.0f, 1.0f, "") // 3.58MHz, Right output
     }
   );
   ENTRY(
     "Coreland Cyber Tank (drums mode)", {
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, -127, ""), // 3.58MHz, Left output
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 127, "") // 3.58MHz, Right output
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, -1.0f, ""), // 3.58MHz, Left output
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 1.0f, "") // 3.58MHz, Right output
     }
   );
   ENTRY(
     "ICE Skimaxx", {
-      CH(DIV_SYSTEM_MSM6295, 64, -127,
+      CH(DIV_SYSTEM_MSM6295, 1.0f, -1.0f,
         "clockSel=2\n"
         "rateSel=true\n"
       ), // 4MHz, Left output
-      CH(DIV_SYSTEM_MSM6295, 64, 127,
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 1.0f,
         "clockSel=2\n"
         "rateSel=true\n"
       ), // 4MHz, Right output
-      CH(DIV_SYSTEM_MSM6295, 64, -127, "clockSel=8"), // 2MHz, Left output
-      CH(DIV_SYSTEM_MSM6295, 64, 127, "clockSel=8") // 2MHz, Right output
+      CH(DIV_SYSTEM_MSM6295, 1.0f, -1.0f, "clockSel=8"), // 2MHz, Left output
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 1.0f, "clockSel=8") // 2MHz, Right output
     }
   );
   ENTRY(
     "Toaplan 1", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, "clockSel=5") // 3.5MHz
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "clockSel=5") // 3.5MHz
     }
   );
   ENTRY(
     "Toaplan 1 (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "clockSel=5") // 3.5MHz
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "clockSel=5") // 3.5MHz
     }
   );
   ENTRY(
     "Dynax/Nakanihon 3rd generation hardware", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""), // AY or YM, optional - 1.79MHz or 3.58MHz; various per game
-      CH(DIV_SYSTEM_OPLL, 64, 0, ""),
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=6") // 1.023MHz mostly
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""), // AY or YM, optional - 1.79MHz or 3.58MHz; various per game
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=6") // 1.023MHz mostly
     }
   );
   ENTRY(
     "Dynax/Nakanihon 3rd generation hardware (drums mode)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, ""), // AY or YM, optional - 1.79MHz or 3.58MHz; various per game
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, ""),
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "clockSel=6") // 1.023MHz mostly
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, ""), // AY or YM, optional - 1.79MHz or 3.58MHz; various per game
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "clockSel=6") // 1.023MHz mostly
     }
   );
   ENTRY(
     "Dynax/Nakanihon Real Break", {
-      CH(DIV_SYSTEM_OPLL, 64, 0, ""),
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "")
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Dynax/Nakanihon Real Break (drums mode)", {
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, ""),
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "")
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Irem M72", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0,
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0,
         "rate=7812\n"
         "outDepth=7\n"
       )
@@ -2095,8 +2095,8 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Irem M92/M107", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_GA20, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_GA20, 1.0f, 0, "")
     }
   );
   CATEGORY_END;
@@ -2105,158 +2105,158 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("FM","chips which use frequency modulation (FM) to generate sound.\nsome of these also pack more (like square and sample channels).");
   ENTRY(
     "Yamaha YM2151 (OPM)", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2203 (OPN)", {
-      CH(DIV_SYSTEM_YM2203, 64, 0, "clockSel=3")
+      CH(DIV_SYSTEM_YM2203, 1.0f, 0, "clockSel=3")
     }
   );
   ENTRY(
     "Yamaha YM2203 (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2203_EXT, 64, 0, "clockSel=3")
+      CH(DIV_SYSTEM_YM2203_EXT, 1.0f, 0, "clockSel=3")
     }
   );
   ENTRY(
     "Yamaha YM2608 (OPNA)", {
-      CH(DIV_SYSTEM_YM2608, 64, 0, "")
+      CH(DIV_SYSTEM_YM2608, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2608 (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2608_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2608_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2610 (OPNB)", {
-      CH(DIV_SYSTEM_YM2610_FULL, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610_FULL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2610 (extended channel 2)", {
-      CH(DIV_SYSTEM_YM2610_FULL_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610_FULL_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2610B (OPNB2)", {
-      CH(DIV_SYSTEM_YM2610B, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2610B (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2610B_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610B_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2612 (OPN2)", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "ladderEffect=true")
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "ladderEffect=true")
     }
   );
   ENTRY(
     "Yamaha YM2612 (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "ladderEffect=true")
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "ladderEffect=true")
     }
   );
   ENTRY(
     "Yamaha YM2612 (OPN2) CSM", {
-      CH(DIV_SYSTEM_YM2612_CSM, 64, 0, "ladderEffect=true")
+      CH(DIV_SYSTEM_YM2612_CSM, 1.0f, 0, "ladderEffect=true")
     }
   );
   ENTRY(
     "Yamaha YM2612 (OPN2) with DualPCM", {
-      CH(DIV_SYSTEM_YM2612_DUALPCM, 64, 0, "ladderEffect=true")
+      CH(DIV_SYSTEM_YM2612_DUALPCM, 1.0f, 0, "ladderEffect=true")
     }
   );
   ENTRY(
     "Yamaha YM2612 (extended channel 3) with DualPCM", {
-      CH(DIV_SYSTEM_YM2612_DUALPCM_EXT, 64, 0, "ladderEffect=true")
+      CH(DIV_SYSTEM_YM2612_DUALPCM_EXT, 1.0f, 0, "ladderEffect=true")
     }
   );
   ENTRY(
     "Yamaha YM2413 (OPLL)", {
-      CH(DIV_SYSTEM_OPLL, 64, 0, "")
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2413 (drums mode)", {
-      CH(DIV_SYSTEM_OPLL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_OPLL_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM2414 (OPZ)", {
-      CH(DIV_SYSTEM_OPZ, 64, 0, "")
+      CH(DIV_SYSTEM_OPZ, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3438 (OPN2C)", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3438 (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3438 (OPN2C) CSM", {
-      CH(DIV_SYSTEM_YM2612_CSM, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612_CSM, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3438 (OPN2C) with DualPCM", {
-      CH(DIV_SYSTEM_YM2612_DUALPCM, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612_DUALPCM, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3438 (extended channel 3) with DualPCM", {
-      CH(DIV_SYSTEM_YM2612_DUALPCM_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2612_DUALPCM_EXT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3526 (OPL)", {
-      CH(DIV_SYSTEM_OPL, 64, 0, "")
+      CH(DIV_SYSTEM_OPL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3526 (drums mode)", {
-      CH(DIV_SYSTEM_OPL_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_OPL_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha Y8950", {
-      CH(DIV_SYSTEM_Y8950, 64, 0, "")
+      CH(DIV_SYSTEM_Y8950, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha Y8950 (drums mode)", {
-      CH(DIV_SYSTEM_Y8950_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_Y8950_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3812 (OPL2)", {
-      CH(DIV_SYSTEM_OPL2, 64, 0, "")
+      CH(DIV_SYSTEM_OPL2, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YM3812 (drums mode)", {
-      CH(DIV_SYSTEM_OPL2_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_OPL2_DRUMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YMF262 (OPL3)", {
-      CH(DIV_SYSTEM_OPL3, 64, 0, "")
+      CH(DIV_SYSTEM_OPL3, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YMF262 (drums mode)", {
-      CH(DIV_SYSTEM_OPL3_DRUMS, 64, 0, "")
+      CH(DIV_SYSTEM_OPL3_DRUMS, 1.0f, 0, "")
     }
   );
   if (settings.hiddenSystems) {
     ENTRY(
       "Yamaha YMU759 (MA-2)", {
-        CH(DIV_SYSTEM_YMU759, 64, 0, "")
+        CH(DIV_SYSTEM_YMU759, 1.0f, 0, "")
       }
     );
   }
@@ -2265,43 +2265,43 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Square","these chips generate square/pulse tones only (but may include noise).");
   ENTRY(
     "TI SN76489", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=1")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=1")
     }
   );
   ENTRY(
     "TI SN76489A", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=4")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=4")
     }
   );
   ENTRY(
     "TI SN76496", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=5")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=5")
     }
   );
   ENTRY(
     "NCR 8496", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=6")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=6")
     }
   );
   ENTRY(
     "Tandy PSSJ 3-voice sound", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=7")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=7")
       // 8 bit DAC
     }
   );
   ENTRY(
     "Sega PSG (SN76489-like)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
     }
   );
   ENTRY(
     "Sega PSG (SN76489-like, Stereo)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "chipType=3")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "chipType=3")
     }
   );
   ENTRY(
     "TI SN94624", {
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=6\n"
         "chipType=8\n"
       )
@@ -2309,7 +2309,7 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "TI SN76494", {
-      CH(DIV_SYSTEM_SMS, 64, 0,
+      CH(DIV_SYSTEM_SMS, 1.0f, 0,
         "clockSel=6\n"
         "chipType=9\n"
       )
@@ -2317,52 +2317,52 @@ void FurnaceGUI::initSystemPresets() {
   );
   ENTRY(
     "Toshiba T6W28", {
-      CH(DIV_SYSTEM_T6W28, 64, 0, "")
+      CH(DIV_SYSTEM_T6W28, 1.0f, 0, "")
     }
   );
   ENTRY(
     "AY-3-8910", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "")
     }
   );
   ENTRY(
     "AY-3-8914", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=3")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=3")
     }
   );
   ENTRY(
     "Yamaha YM2149(F)", {
-      CH(DIV_SYSTEM_AY8910, 64, 0, "chipType=1")
+      CH(DIV_SYSTEM_AY8910, 1.0f, 0, "chipType=1")
     }
   );
   ENTRY(
     "Philips SAA1099", {
-      CH(DIV_SYSTEM_SAA1099, 64, 0, "")
+      CH(DIV_SYSTEM_SAA1099, 1.0f, 0, "")
     }
   );
   ENTRY(
     "PC Speaker", {
-      CH(DIV_SYSTEM_PCSPKR, 32, 0, "")
+      CH(DIV_SYSTEM_PCSPKR, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Pokémon Mini", {
-      CH(DIV_SYSTEM_POKEMINI, 32, 0, "")
+      CH(DIV_SYSTEM_POKEMINI, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Commodore VIC", {
-      CH(DIV_SYSTEM_VIC20, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_VIC20, 1.0f, 0, "clockSel=1")
     }
   );
   ENTRY(
     "OKI MSM5232", {
-      CH(DIV_SYSTEM_MSM5232, 64, 0, "")
+      CH(DIV_SYSTEM_MSM5232, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Pong", {
-      CH(DIV_SYSTEM_PONG, 64, 0, "")
+      CH(DIV_SYSTEM_PONG, 1.0f, 0, "")
     }
   );
   CATEGORY_END;
@@ -2370,63 +2370,63 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Sample","chips/systems which use PCM or ADPCM samples for sound synthesis.");
   ENTRY(
     "Amiga", {
-      CH(DIV_SYSTEM_AMIGA, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_AMIGA, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50"
   );
   ENTRY(
     "SegaPCM", {
-      CH(DIV_SYSTEM_SEGAPCM, 64, 0, "")
+      CH(DIV_SYSTEM_SEGAPCM, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Capcom QSound", {
-      CH(DIV_SYSTEM_QSOUND, 64, 0, "")
+      CH(DIV_SYSTEM_QSOUND, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Seta/Allumer X1-010", {
-      CH(DIV_SYSTEM_X1_010, 64, 0, "")
+      CH(DIV_SYSTEM_X1_010, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Yamaha YMZ280B (PCMD8)", {
-      CH(DIV_SYSTEM_YMZ280B, 64, 0, "")
+      CH(DIV_SYSTEM_YMZ280B, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Ricoh RF5C68", {
-      CH(DIV_SYSTEM_RF5C68, 64, 0, "")
+      CH(DIV_SYSTEM_RF5C68, 1.0f, 0, "")
     }
   ); 
   ENTRY(
     "OKI MSM6258", {
-      CH(DIV_SYSTEM_MSM6258, 64, 0, "")
+      CH(DIV_SYSTEM_MSM6258, 1.0f, 0, "")
     }
   );
   ENTRY(
     "OKI MSM6295", {
-      CH(DIV_SYSTEM_MSM6295, 64, 0, "")
+      CH(DIV_SYSTEM_MSM6295, 1.0f, 0, "")
     }
   );
   ENTRY(
     "SNES", {
-      CH(DIV_SYSTEM_SNES, 64, 0, "")
+      CH(DIV_SYSTEM_SNES, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Konami K007232", {
-      CH(DIV_SYSTEM_K007232, 64, 0, "")
+      CH(DIV_SYSTEM_K007232, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Irem GA20", {
-      CH(DIV_SYSTEM_GA20, 64, 0, "")
+      CH(DIV_SYSTEM_GA20, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Generic PCM DAC", {
-      CH(DIV_SYSTEM_PCM_DAC, 64, 0, "")
+      CH(DIV_SYSTEM_PCM_DAC, 1.0f, 0, "")
     }
   );
   ENTRY(
@@ -2439,70 +2439,70 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Wavetable","chips which use user-specified waveforms to generate sound.");
   ENTRY(
     "PC Engine", {
-      CH(DIV_SYSTEM_PCE, 64, 0, "")
+      CH(DIV_SYSTEM_PCE, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Commodore PET (pseudo-wavetable)", {
-      CH(DIV_SYSTEM_PET, 64, 0, "")
+      CH(DIV_SYSTEM_PET, 1.0f, 0, "")
     },
     "tickRate=50"
   );
   ENTRY(
     "Konami Bubble System WSG", {
-      CH(DIV_SYSTEM_BUBSYS_WSG, 64, 0, "")
+      CH(DIV_SYSTEM_BUBSYS_WSG, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Konami SCC", {
-      CH(DIV_SYSTEM_SCC, 64, 0, "")
+      CH(DIV_SYSTEM_SCC, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Konami SCC+", {
-      CH(DIV_SYSTEM_SCC_PLUS, 64, 0, "")
+      CH(DIV_SYSTEM_SCC_PLUS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco WSG", {
-      CH(DIV_SYSTEM_NAMCO, 64, 0, "")
+      CH(DIV_SYSTEM_NAMCO, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco C15 (8-channel mono)", {
-      CH(DIV_SYSTEM_NAMCO_15XX, 64, 0, "")
+      CH(DIV_SYSTEM_NAMCO_15XX, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco C30 (8-channel stereo)", {
-      CH(DIV_SYSTEM_NAMCO_CUS30, 64, 0, "")
+      CH(DIV_SYSTEM_NAMCO_CUS30, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Namco 163", {
-      CH(DIV_SYSTEM_N163, 64, 0, "")
+      CH(DIV_SYSTEM_N163, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom Disk System (chip)", {
-      CH(DIV_SYSTEM_FDS, 64, 0, "")
+      CH(DIV_SYSTEM_FDS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "WonderSwan", {
-      CH(DIV_SYSTEM_SWAN, 64, 0, "")
+      CH(DIV_SYSTEM_SWAN, 1.0f, 0, "")
     },
     "tickRate=75.47169811320754716981"
   );
   ENTRY(
     "Virtual Boy", {
-      CH(DIV_SYSTEM_VBOY, 64, 0, "")
+      CH(DIV_SYSTEM_VBOY, 1.0f, 0, "")
     },
     "tickRate=50.2734877734878"
   );
   ENTRY(
     "Seta/Allumer X1-010", {
-      CH(DIV_SYSTEM_X1_010, 64, 0, "")
+      CH(DIV_SYSTEM_X1_010, 1.0f, 0, "")
     }
   );
   CATEGORY_END;
@@ -2510,67 +2510,67 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("Specialized","chips/systems with unique sound synthesis methods.");
   ENTRY(
     "MOS Technology SID (6581)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "MOS Technology SID (8580)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Microchip AY8930", {
-      CH(DIV_SYSTEM_AY8930, 64, 0, "")
+      CH(DIV_SYSTEM_AY8930, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Game Boy", {
-      CH(DIV_SYSTEM_GB, 64, 0, "")
+      CH(DIV_SYSTEM_GB, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Atari Lynx", {
-      CH(DIV_SYSTEM_LYNX, 64, 0, "")
+      CH(DIV_SYSTEM_LYNX, 1.0f, 0, "")
     }
   );
   ENTRY(
     "POKEY", {
-      CH(DIV_SYSTEM_POKEY, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_POKEY, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50"
   );
   ENTRY(
     "Atari TIA", {
-      CH(DIV_SYSTEM_TIA, 64, 0, "")
+      CH(DIV_SYSTEM_TIA, 1.0f, 0, "")
     }
   );
   ENTRY(
     "NES (Ricoh 2A03)", {
-      CH(DIV_SYSTEM_NES, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Commander X16 (VERA only)", {
-      CH(DIV_SYSTEM_VERA, 64, 0, "")
+      CH(DIV_SYSTEM_VERA, 1.0f, 0, "")
     }
   );
   ENTRY(
     "ZX Spectrum (beeper only)", {
-      CH(DIV_SYSTEM_SFX_BEEPER, 64, 0, "")
+      CH(DIV_SYSTEM_SFX_BEEPER, 1.0f, 0, "")
     }
   );
   if (settings.hiddenSystems) {
     ENTRY(
       "Dummy System", {
-        CH(DIV_SYSTEM_DUMMY, 64, 0, "")
+        CH(DIV_SYSTEM_DUMMY, 1.0f, 0, "")
       }
     );
   }
   ENTRY(
     "tildearrow Sound Unit", {
-      CH(DIV_SYSTEM_SOUND_UNIT, 64, 0, "")
+      CH(DIV_SYSTEM_SOUND_UNIT, 1.0f, 0, "")
     }
   );
   CATEGORY_END;
@@ -2578,80 +2578,80 @@ void FurnaceGUI::initSystemPresets() {
   CATEGORY_BEGIN("DefleMask-compatible","these configurations are compatible with DefleMask.\nselect this if you need to save as .dmf or work with that program.");
   ENTRY(
     "Sega Genesis", {
-      CH(DIV_SYSTEM_YM2612, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Genesis (extended channel 3)", {
-      CH(DIV_SYSTEM_YM2612_EXT, 64, 0, ""),
-      CH(DIV_SYSTEM_SMS, 32, 0, "")
+      CH(DIV_SYSTEM_YM2612_EXT, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SMS, 0.5f, 0, "")
     }
   );
   ENTRY(
     "Sega Master System", {
-      CH(DIV_SYSTEM_SMS, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Sega Master System (with FM expansion)", {
-      CH(DIV_SYSTEM_SMS, 64, 0, ""),
-      CH(DIV_SYSTEM_OPLL, 64, 0, "")
+      CH(DIV_SYSTEM_SMS, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_OPLL, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Game Boy", {
-      CH(DIV_SYSTEM_GB, 64, 0, "")
+      CH(DIV_SYSTEM_GB, 1.0f, 0, "")
     }
   );
   ENTRY(
     "NEC PC Engine/TurboGrafx-16", {
-      CH(DIV_SYSTEM_PCE, 64, 0, "")
+      CH(DIV_SYSTEM_PCE, 1.0f, 0, "")
     }
   );
   ENTRY(
     "NES", {
-      CH(DIV_SYSTEM_NES, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom with Konami VRC7", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_VRC7, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_VRC7, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Famicom Disk System", {
-      CH(DIV_SYSTEM_NES, 64, 0, ""),
-      CH(DIV_SYSTEM_FDS, 64, 0, "")
+      CH(DIV_SYSTEM_NES, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_FDS, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Commodore 64 (6581 SID)", {
-      CH(DIV_SYSTEM_C64_6581, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_C64_6581, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Commodore 64 (8580 SID)", {
-      CH(DIV_SYSTEM_C64_8580, 64, 0, "clockSel=1")
+      CH(DIV_SYSTEM_C64_8580, 1.0f, 0, "clockSel=1")
     },
     "tickRate=50.1245421"
   );
   ENTRY(
     "Arcade (YM2151 and SegaPCM)", {
-      CH(DIV_SYSTEM_YM2151, 64, 0, ""),
-      CH(DIV_SYSTEM_SEGAPCM_COMPAT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2151, 1.0f, 0, ""),
+      CH(DIV_SYSTEM_SEGAPCM_COMPAT, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Neo Geo CD", {
-      CH(DIV_SYSTEM_YM2610, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610, 1.0f, 0, "")
     }
   );
   ENTRY(
     "Neo Geo CD (extended channel 2)", {
-      CH(DIV_SYSTEM_YM2610_EXT, 64, 0, "")
+      CH(DIV_SYSTEM_YM2610_EXT, 1.0f, 0, "")
     }
   );
   CATEGORY_END;
@@ -2664,7 +2664,7 @@ FurnaceGUISysDef::FurnaceGUISysDef(const char* n, std::initializer_list<FurnaceG
   int index=0;
   for (FurnaceGUISysDefChip& i: orig) {
     definition+=fmt::sprintf(
-      "id%d=%d\nvol%d=%d\npan%d=%d\nflags%d=%s\n",
+      "id%d=%d\nvol%d=%f\npan%d=%f\nflags%d=%s\n",
       index,
       DivEngine::systemToFileFur(i.sys),
       index,
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 2b670184..b998d321 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -73,6 +73,22 @@ const char* audioBackends[]={
   "SDL"
 };
 
+const bool isProAudio[]={
+  true,
+  false
+};
+
+const char* nonProAudioOuts[]={
+  "Mono",
+  "Stereo",
+  "What?",
+  "Quadraphonic",
+  "What?",
+  "5.1 Surround",
+  "What?",
+  "7.1 Surround"
+};
+
 const char* audioQualities[]={
   "High",
   "Low"
@@ -192,6 +208,11 @@ const char* specificControls[18]={
     settings.audioBufSize=x; \
   }
 
+#define CHANS_SELECTABLE(x) \
+  if (ImGui::Selectable(nonProAudioOuts[x-1],settings.audioChans==x)) { \
+    settings.audioChans=x; \
+  }
+
 #define UI_COLOR_CONFIG(what,label) \
   if (ImGui::ColorEdit4(label "##CC_" #what,(float*)&uiColors[what])) { \
     applyUISettings(false); \
@@ -288,8 +309,9 @@ void FurnaceGUI::drawSettings() {
             settings.initialSys.clear();
             for (int i=0; i<e->song.systemLen; i++) {
               settings.initialSys.set(fmt::sprintf("id%d",i),e->systemToFileFur(e->song.system[i]));
-              settings.initialSys.set(fmt::sprintf("vol%d",i),(int)e->song.systemVol[i]);
-              settings.initialSys.set(fmt::sprintf("pan%d",i),(int)e->song.systemPan[i]);
+              settings.initialSys.set(fmt::sprintf("vol%d",i),(float)e->song.systemVol[i]);
+              settings.initialSys.set(fmt::sprintf("pan%d",i),(float)e->song.systemPan[i]);
+              settings.initialSys.set(fmt::sprintf("fr%d",i),(float)e->song.systemPanFR[i]);
               settings.initialSys.set(fmt::sprintf("flags%d",i),e->song.systemFlags[i].toBase64());
             }
             settings.initialSysName=e->song.systemName;
@@ -303,14 +325,16 @@ void FurnaceGUI::drawSettings() {
             if (totalAvailSys>0) {
               for (int i=0; i<howMany; i++) {
                 settings.initialSys.set(fmt::sprintf("id%d",i),e->systemToFileFur((DivSystem)availableSystems[rand()%totalAvailSys]));
-                settings.initialSys.set(fmt::sprintf("vol%d",i),64);
-                settings.initialSys.set(fmt::sprintf("pan%d",i),0);
+                settings.initialSys.set(fmt::sprintf("vol%d",i),1.0f);
+                settings.initialSys.set(fmt::sprintf("pan%d",i),0.0f);
+                settings.initialSys.set(fmt::sprintf("fr%d",i),0.0f);
                 settings.initialSys.set(fmt::sprintf("flags%d",i),"");
               }
             } else {
               settings.initialSys.set("id0",e->systemToFileFur(DIV_SYSTEM_DUMMY));
-              settings.initialSys.set("vol0",64);
-              settings.initialSys.set("pan0",0);
+              settings.initialSys.set("vol0",1.0f);
+              settings.initialSys.set("pan0",0.0f);
+              settings.initialSys.set("fr0",0.0f);
               settings.initialSys.set("flags0","");
               howMany=1;
             }
@@ -345,12 +369,14 @@ void FurnaceGUI::drawSettings() {
           if (ImGui::Button("Reset to defaults")) {
             settings.initialSys.clear();
             settings.initialSys.set("id0",e->systemToFileFur(DIV_SYSTEM_YM2612));
-            settings.initialSys.set("vol0",64);
-            settings.initialSys.set("pan0",0);
+            settings.initialSys.set("vol0",1.0f);
+            settings.initialSys.set("pan0",0.0f);
+            settings.initialSys.set("fr0",0.0f);
             settings.initialSys.set("flags0","");
             settings.initialSys.set("id1",e->systemToFileFur(DIV_SYSTEM_SMS));
-            settings.initialSys.set("vol1",32);
-            settings.initialSys.set("pan1",0);
+            settings.initialSys.set("vol1",0.5f);
+            settings.initialSys.set("pan1",0.0f);
+            settings.initialSys.set("fr1",0.0f);
             settings.initialSys.set("flags1","");
             settings.initialSysName="Sega Genesis/Mega Drive";
           }
@@ -364,14 +390,15 @@ void FurnaceGUI::drawSettings() {
           int doRemove=-1;
           for (size_t i=0; settings.initialSys.getInt(fmt::sprintf("id%d",i),0); i++) {
             DivSystem sysID=e->systemFromFileFur(settings.initialSys.getInt(fmt::sprintf("id%d",i),0));
-            signed char sysVol=settings.initialSys.getInt(fmt::sprintf("vol%d",i),0);
-            signed char sysPan=settings.initialSys.getInt(fmt::sprintf("pan%d",i),0);
+            float sysVol=settings.initialSys.getFloat(fmt::sprintf("vol%d",i),0);
+            float sysPan=settings.initialSys.getFloat(fmt::sprintf("pan%d",i),0);
+            float sysPanFR=settings.initialSys.getFloat(fmt::sprintf("fr%d",i),0);
 
             sysCount=i+1;
 
             //bool doRemove=false;
-            bool doInvert=sysVol&128;
-            signed char vol=sysVol&127;
+            bool doInvert=(sysVol<0);
+            float vol=fabs(sysVol);
             ImGui::PushID(i);
 
             ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x-ImGui::CalcTextSize("Invert").x-ImGui::GetFrameHeightWithSpacing()*2.0-ImGui::GetStyle().ItemSpacing.x);
@@ -388,8 +415,8 @@ void FurnaceGUI::drawSettings() {
 
             ImGui::SameLine();
             if (ImGui::Checkbox("Invert",&doInvert)) {
-              sysVol^=128;
-              settings.initialSys.set(fmt::sprintf("vol%d",i),(int)sysVol);
+              sysVol=-sysVol;
+              settings.initialSys.set(fmt::sprintf("vol%d",i),sysVol);
             }
             ImGui::SameLine();
             //ImGui::BeginDisabled(settings.initialSys.size()<=4);
@@ -397,14 +424,27 @@ void FurnaceGUI::drawSettings() {
               doRemove=i;
             }
             //ImGui::EndDisabled();
-            ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x-(50.0f*dpiScale));
-            if (CWSliderScalar("Volume",ImGuiDataType_S8,&vol,&_ZERO,&_ONE_HUNDRED_TWENTY_SEVEN)) {
-              sysVol=(sysVol&128)|vol;
-              settings.initialSys.set(fmt::sprintf("vol%d",i),(int)sysVol);
+            ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+            if (CWSliderFloat("Volume",&vol,0.0f,3.0f)) {
+              if (doInvert) {
+                if (vol<0.0001) vol=0.0001;
+              }
+              if (vol<0) vol=0;
+              if (vol>10) vol=10;
+              sysVol=doInvert?-vol:vol;
+              settings.initialSys.set(fmt::sprintf("vol%d",i),(float)sysVol);
             } rightClickable
-            ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x-(50.0f*dpiScale));
-            if (CWSliderScalar("Panning",ImGuiDataType_S8,&sysPan,&_MINUS_ONE_HUNDRED_TWENTY_SEVEN,&_ONE_HUNDRED_TWENTY_SEVEN)) {
-              settings.initialSys.set(fmt::sprintf("pan%d",i),(int)sysPan);
+            ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+            if (CWSliderFloat("Panning",&sysPan,-1.0f,1.0f)) {
+              if (sysPan<-1.0f) sysPan=-1.0f;
+              if (sysPan>1.0f) sysPan=1.0f;
+              settings.initialSys.set(fmt::sprintf("pan%d",i),(float)sysPan);
+            } rightClickable
+            ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
+            if (CWSliderFloat("Front/Rear",&sysPanFR,-1.0f,1.0f)) {
+              if (sysPanFR<-1.0f) sysPanFR=-1.0f;
+              if (sysPanFR>1.0f) sysPanFR=1.0f;
+              settings.initialSys.set(fmt::sprintf("fr%d",i),(float)sysPanFR);
             } rightClickable
 
             // oh please MSVC don't cry
@@ -424,25 +464,29 @@ void FurnaceGUI::drawSettings() {
           if (doRemove>=0 && sysCount>1) {
             for (int i=doRemove; i<sysCount-1; i++) {
               int sysID=settings.initialSys.getInt(fmt::sprintf("id%d",i+1),0);
-              int sysVol=settings.initialSys.getInt(fmt::sprintf("vol%d",i+1),0);
-              int sysPan=settings.initialSys.getInt(fmt::sprintf("pan%d",i+1),0);
+              float sysVol=settings.initialSys.getFloat(fmt::sprintf("vol%d",i+1),0);
+              float sysPan=settings.initialSys.getFloat(fmt::sprintf("pan%d",i+1),0);
+              float sysPanFR=settings.initialSys.getFloat(fmt::sprintf("fr%d",i+1),0);
               String sysFlags=settings.initialSys.getString(fmt::sprintf("flags%d",i+1),"");
               settings.initialSys.set(fmt::sprintf("id%d",i),sysID);
               settings.initialSys.set(fmt::sprintf("vol%d",i),sysVol);
               settings.initialSys.set(fmt::sprintf("pan%d",i),sysPan);
+              settings.initialSys.set(fmt::sprintf("fr%d",i),sysPanFR);
               settings.initialSys.set(fmt::sprintf("flags%d",i),sysFlags);
             }
 
             settings.initialSys.remove(fmt::sprintf("id%d",sysCount-1));
             settings.initialSys.remove(fmt::sprintf("vol%d",sysCount-1));
             settings.initialSys.remove(fmt::sprintf("pan%d",sysCount-1));
+            settings.initialSys.remove(fmt::sprintf("fr%d",sysCount-1));
             settings.initialSys.remove(fmt::sprintf("flags%d",sysCount-1));
           }
 
           if (sysCount<32) if (ImGui::Button(ICON_FA_PLUS "##InitSysAdd")) {
             settings.initialSys.set(fmt::sprintf("id%d",sysCount),(int)e->systemToFileFur(DIV_SYSTEM_YM2612));
-            settings.initialSys.set(fmt::sprintf("vol%d",sysCount),64);
-            settings.initialSys.set(fmt::sprintf("pan%d",sysCount),0);
+            settings.initialSys.set(fmt::sprintf("vol%d",sysCount),1.0f);
+            settings.initialSys.set(fmt::sprintf("pan%d",sysCount),0.0f);
+            settings.initialSys.set(fmt::sprintf("fr%d",sysCount),0.0f);
             settings.initialSys.set(fmt::sprintf("flags%d",sysCount),"");
           }
 
@@ -676,9 +720,16 @@ void FurnaceGUI::drawSettings() {
         ImVec2 settingsViewSize=ImGui::GetContentRegionAvail();
         settingsViewSize.y-=ImGui::GetFrameHeight()+ImGui::GetStyle().WindowPadding.y;
         if (ImGui::BeginChild("SettingsView",settingsViewSize)) {
+#ifdef HAVE_JACK
           ImGui::Text("Backend");
           ImGui::SameLine();
-          ImGui::Combo("##Backend",&settings.audioEngine,audioBackends,2);
+          int prevAudioEngine=settings.audioEngine;
+          if (ImGui::Combo("##Backend",&settings.audioEngine,audioBackends,2)) {
+            if (settings.audioEngine!=prevAudioEngine) {
+              if (!isProAudio[settings.audioEngine]) settings.audioChans=2;
+            }
+          }
+#endif
 
           ImGui::Text("Device");
           ImGui::SameLine();
@@ -711,6 +762,27 @@ void FurnaceGUI::drawSettings() {
             ImGui::EndCombo();
           }
 
+          if (isProAudio[settings.audioEngine]) {
+            ImGui::Text("Outputs");
+            ImGui::SameLine();
+            if (ImGui::InputInt("##AudioChansI",&settings.audioChans,1,1)) {
+              if (settings.audioChans<1) settings.audioChans=1;
+              if (settings.audioChans>16) settings.audioChans=16;
+            }
+          } else {
+            ImGui::Text("Channels");
+            ImGui::SameLine();
+            String chStr=(settings.audioChans<1 || settings.audioChans>8)?"What?":nonProAudioOuts[settings.audioChans-1];
+            if (ImGui::BeginCombo("##AudioChans",chStr.c_str())) {
+              CHANS_SELECTABLE(1);
+              CHANS_SELECTABLE(2);
+              CHANS_SELECTABLE(4);
+              CHANS_SELECTABLE(6);
+              CHANS_SELECTABLE(8);
+              ImGui::EndCombo();
+            }
+          }
+
           ImGui::Text("Buffer size");
           ImGui::SameLine();
           String bs=fmt::sprintf("%d (latency: ~%.1fms)",settings.audioBufSize,2000.0*(double)settings.audioBufSize/(double)MAX(1,settings.audioRate));
@@ -757,8 +829,8 @@ void FurnaceGUI::drawSettings() {
           TAAudioDesc& audioWant=e->getAudioDescWant();
           TAAudioDesc& audioGot=e->getAudioDescGot();
 
-          ImGui::Text("want: %d samples @ %.0fHz",audioWant.bufsize,audioWant.rate);
-          ImGui::Text("got: %d samples @ %.0fHz",audioGot.bufsize,audioGot.rate);
+          ImGui::Text("want: %d samples @ %.0fHz (%d channels)",audioWant.bufsize,audioWant.rate,audioWant.outChans);
+          ImGui::Text("got: %d samples @ %.0fHz (%d channels)",audioGot.bufsize,audioGot.rate,audioWant.outChans);
 
           ImGui::Separator();
 
@@ -1900,6 +1972,22 @@ void FurnaceGUI::drawSettings() {
               UI_COLOR_CONFIG(GUI_COLOR_PIANO_KEY_BOTTOM_ACTIVE,"Lower key (pressed)");
               ImGui::TreePop();
             }
+            if (ImGui::TreeNode("Clock")) {
+              UI_COLOR_CONFIG(GUI_COLOR_CLOCK_TEXT,"Clock text");
+              UI_COLOR_CONFIG(GUI_COLOR_CLOCK_BEAT_LOW,"Beat (off)");
+              UI_COLOR_CONFIG(GUI_COLOR_CLOCK_BEAT_HIGH,"Beat (on)");
+
+              ImGui::TreePop();
+            }
+            if (ImGui::TreeNode("Patchbay")) {
+              UI_COLOR_CONFIG(GUI_COLOR_PATCHBAY_PORTSET,"PortSet");
+              UI_COLOR_CONFIG(GUI_COLOR_PATCHBAY_PORT,"Port");
+              UI_COLOR_CONFIG(GUI_COLOR_PATCHBAY_PORT_HIDDEN,"Port (hidden/unavailable)");
+              UI_COLOR_CONFIG(GUI_COLOR_PATCHBAY_CONNECTION,"Connection (selected)");
+              UI_COLOR_CONFIG(GUI_COLOR_PATCHBAY_CONNECTION_BG,"Connection (other)");
+
+              ImGui::TreePop();
+            }
             if (ImGui::TreeNode("Log Viewer")) {
               UI_COLOR_CONFIG(GUI_COLOR_LOGLEVEL_ERROR,"Log level: Error");
               UI_COLOR_CONFIG(GUI_COLOR_LOGLEVEL_WARNING,"Log level: Warning");
@@ -2343,6 +2431,7 @@ void FurnaceGUI::syncSettings() {
   settings.iconSize=e->getConfInt("iconSize",16);
   settings.audioEngine=(e->getConfString("audioEngine","SDL")=="SDL")?1:0;
   settings.audioDevice=e->getConfString("audioDevice","");
+  settings.audioChans=e->getConfInt("audioChans",2);
   settings.midiInDevice=e->getConfString("midiInDevice","");
   settings.midiOutDevice=e->getConfString("midiOutDevice","");
   settings.c163Name=e->getConfString("c163Name",DIV_C163_DEFAULT_NAME);
@@ -2476,6 +2565,7 @@ void FurnaceGUI::syncSettings() {
   clampSetting(settings.audioQuality,0,1);
   clampSetting(settings.audioBufSize,32,4096);
   clampSetting(settings.audioRate,8000,384000);
+  clampSetting(settings.audioChans,1,16);
   clampSetting(settings.arcadeCore,0,1);
   clampSetting(settings.ym2612Core,0,1);
   clampSetting(settings.snCore,0,1);
@@ -2582,21 +2672,37 @@ void FurnaceGUI::syncSettings() {
   if (settings.exportFadeOut<0.0) settings.exportFadeOut=0.0;
 
   String initialSys2=e->getConfString("initialSys2","");
+  bool oldVol=e->getConfInt("configVersion",DIV_ENGINE_VERSION)<135;
   if (initialSys2.empty()) {
     initialSys2=e->decodeSysDesc(e->getConfString("initialSys",""));
+    oldVol=false;
   }
   settings.initialSys.clear();
   settings.initialSys.loadFromBase64(initialSys2.c_str());
   if (settings.initialSys.getInt("id0",0)==0) {
     settings.initialSys.clear();
     settings.initialSys.set("id0",e->systemToFileFur(DIV_SYSTEM_YM2612));
-    settings.initialSys.set("vol0",64);
-    settings.initialSys.set("pan0",0);
+    settings.initialSys.set("vol0",1.0f);
+    settings.initialSys.set("pan0",0.0f);
+    settings.initialSys.set("fr0",0.0f);
     settings.initialSys.set("flags0","");
     settings.initialSys.set("id1",e->systemToFileFur(DIV_SYSTEM_SMS));
-    settings.initialSys.set("vol1",64);
+    settings.initialSys.set("vol1",0.5f);
     settings.initialSys.set("pan1",0);
+    settings.initialSys.set("fr1",0);
     settings.initialSys.set("flags1","");
+  } else {
+    if (oldVol) {
+      for (int i=0; settings.initialSys.getInt(fmt::sprintf("id%d",i),0); i++) {
+        float newVol=settings.initialSys.getInt(fmt::sprintf("vol%d",i),64);
+        float newPan=settings.initialSys.getInt(fmt::sprintf("pan%d",i),0);
+        newVol/=64.0f;
+        newPan/=127.0f;
+        settings.initialSys.set(fmt::sprintf("vol%d",i),newVol);
+        settings.initialSys.set(fmt::sprintf("pan%d",i),newPan);
+      }
+      e->setConf("initialSys2",settings.initialSys.toBase64());
+    }
   }
 
   // keybinds
@@ -2643,6 +2749,7 @@ void FurnaceGUI::commitSettings() {
   e->setConf("audioQuality",settings.audioQuality);
   e->setConf("audioBufSize",settings.audioBufSize);
   e->setConf("audioRate",settings.audioRate);
+  e->setConf("audioChans",settings.audioChans);
   e->setConf("arcadeCore",settings.arcadeCore);
   e->setConf("ym2612Core",settings.ym2612Core);
   e->setConf("snCore",settings.snCore);
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 9ba31ce7..3136d628 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -1198,6 +1198,7 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
     case DIV_SYSTEM_OPL3:
     case DIV_SYSTEM_OPL3_DRUMS: {
       int clockSel=flags.getInt("clockSel",0);
+      bool compatPan=flags.getBool("compatPan",false);
 
       ImGui::Text("Clock rate:");
       if (ImGui::RadioButton("14.32MHz (NTSC)",clockSel==0)) {
@@ -1221,9 +1222,14 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
         altered=true;
       }
 
+      if (ImGui::Checkbox("Compatible panning (0800)",&compatPan)) {
+        altered=true;
+      }
+
       if (altered) {
         e->lockSave([&]() {
           flags.set("clockSel",clockSel);
+          flags.set("compatPan",compatPan);
         });
       }
       break;
diff --git a/src/gui/volMeter.cpp b/src/gui/volMeter.cpp
index d058e31f..f050341d 100644
--- a/src/gui/volMeter.cpp
+++ b/src/gui/volMeter.cpp
@@ -51,7 +51,8 @@ void FurnaceGUI::drawVolMeter() {
     ImU32 lowColor=ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_LOW]);
     if (ImGui::ItemAdd(rect,ImGui::GetID("volMeter"))) {
       ImGui::RenderFrame(rect.Min,rect.Max,ImGui::GetColorU32(ImGuiCol_FrameBg),true,style.FrameRounding);
-      for (int i=0; i<2; i++) {
+      int outChans=e->getAudioDescGot().outChans;
+      for (int i=0; i<outChans; i++) {
         float logPeak=(20*log10(peak[i])/36.0);
         if (logPeak==NAN) logPeak=0.0;
         if (logPeak<-1.0) logPeak=-1.0;
@@ -66,10 +67,10 @@ void FurnaceGUI::drawVolMeter() {
         ImRect s;
         if (aspectRatio) {
           s=ImRect(
-            ImLerp(rect.Min,rect.Max,ImVec2(0,float(i)*0.5)),
-            ImLerp(rect.Min,rect.Max,ImVec2(logPeak,float(i+1)*0.5))
+            ImLerp(rect.Min,rect.Max,ImVec2(0,float(i)/outChans)),
+            ImLerp(rect.Min,rect.Max,ImVec2(logPeak,float(i+1)/outChans))
           );
-          if (i==0) s.Max.y-=dpiScale;
+          if (i!=(outChans-1)) s.Max.y-=dpiScale;
           if (isClipping) {
             dl->AddRectFilled(s.Min,s.Max,ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_PEAK]));
           } else {
@@ -77,10 +78,10 @@ void FurnaceGUI::drawVolMeter() {
           }
         } else {
           s=ImRect(
-            ImLerp(rect.Min,rect.Max,ImVec2(float(i)*0.5,1.0-logPeak)),
-            ImLerp(rect.Min,rect.Max,ImVec2(float(i+1)*0.5,1.0))
+            ImLerp(rect.Min,rect.Max,ImVec2(float(i)/outChans,1.0-logPeak)),
+            ImLerp(rect.Min,rect.Max,ImVec2(float(i+1)/outChans,1.0))
           );
-          if (i==0) s.Max.x-=dpiScale;
+          if (i!=(outChans-1)) s.Max.x-=dpiScale;
           if (isClipping) {
             dl->AddRectFilled(s.Min,s.Max,ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_PEAK]));
           } else {
diff --git a/src/winMain.cpp b/src/winMain.cpp
index c904b996..853b1153 100644
--- a/src/winMain.cpp
+++ b/src/winMain.cpp
@@ -22,10 +22,6 @@
 typedef HRESULT (*SPDA)(int);
 
 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prevInst, PSTR args, int state) {
-  if (AttachConsole(ATTACH_PARENT_PROCESS)==0) {
-    if (GetLastError()==ERROR_ACCESS_DENIED) FreeConsole();
-  }
-
   int argc=0;
   wchar_t** argw=CommandLineToArgvW(GetCommandLineW(),&argc);
   char** argv=new char*[argc+1];