diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index 6071fc47..c91b56ef 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -440,6 +440,26 @@ class DivDispatch {
      */
     virtual const char** getRegisterSheet();
 
+    /**
+     * Get sample memory buffer.
+     */
+    virtual const void* getSampleMem(int index = 0);
+
+    /**
+     * Get sample memory capacity.
+     */
+    virtual size_t getSampleMemCapacity(int index = 0);
+
+    /**
+     * Get sample memory usage.
+     */
+    virtual size_t getSampleMemUsage(int index = 0);
+
+    /**
+     * Render samples into sample memory.
+     */
+    virtual void renderSamples();
+
     /**
      * initialize this DivDispatch.
      * @param parent the parent DivEngine.
diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index ad67a018..b37ed86c 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -506,118 +506,12 @@ void DivEngine::renderSamples() {
     song.sample[i]->render();
   }
 
-  // step 2: allocate ADPCM-A samples
-  if (adpcmAMem==NULL) adpcmAMem=new unsigned char[16777216];
-
-  size_t memPos=0;
-  for (int i=0; i<song.sampleLen; i++) {
-    DivSample* s=song.sample[i];
-    int paddedLen=(s->lengthA+255)&(~0xff);
-    if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
-      memPos=(memPos+0xfffff)&0xf00000;
+  // step 2: render samples to dispatch
+  for (int i=0; i<song.systemLen; i++) {
+    if (disCont[i].dispatch!=NULL) {
+      disCont[i].dispatch->renderSamples();
     }
-    if (memPos>=16777216) {
-      logW("out of ADPCM-A memory for sample %d!",i);
-      break;
-    }
-    if (memPos+paddedLen>=16777216) {
-      memcpy(adpcmAMem+memPos,s->dataA,16777216-memPos);
-      logW("out of ADPCM-A memory for sample %d!",i);
-    } else {
-      memcpy(adpcmAMem+memPos,s->dataA,paddedLen);
-    }
-    s->offA=memPos;
-    memPos+=paddedLen;
   }
-  adpcmAMemLen=memPos+256;
-
-  // step 2: allocate ADPCM-B samples
-  if (adpcmBMem==NULL) adpcmBMem=new unsigned char[16777216];
-
-  memPos=0;
-  for (int i=0; i<song.sampleLen; i++) {
-    DivSample* s=song.sample[i];
-    int paddedLen=(s->lengthB+255)&(~0xff);
-    if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
-      memPos=(memPos+0xfffff)&0xf00000;
-    }
-    if (memPos>=16777216) {
-      logW("out of ADPCM-B memory for sample %d!",i);
-      break;
-    }
-    if (memPos+paddedLen>=16777216) {
-      memcpy(adpcmBMem+memPos,s->dataB,16777216-memPos);
-      logW("out of ADPCM-B memory for sample %d!",i);
-    } else {
-      memcpy(adpcmBMem+memPos,s->dataB,paddedLen);
-    }
-    s->offB=memPos;
-    memPos+=paddedLen;
-  }
-  adpcmBMemLen=memPos+256;
-
-  // step 4: allocate qsound pcm samples
-  if (qsoundMem==NULL) qsoundMem=new unsigned char[16777216];
-  memset(qsoundMem,0,16777216);
-
-  memPos=0;
-  for (int i=0; i<song.sampleLen; i++) {
-    DivSample* s=song.sample[i];
-    int length=s->length8;
-    if (length>65536-16) {
-      length=65536-16;
-    }
-    if ((memPos&0xff0000)!=((memPos+length)&0xff0000)) {
-      memPos=(memPos+0xffff)&0xff0000;
-    }
-    if (memPos>=16777216) {
-      logW("out of QSound PCM memory for sample %d!",i);
-      break;
-    }
-    if (memPos+length>=16777216) {
-      for (unsigned int i=0; i<16777216-(memPos+length); i++) {
-        qsoundMem[(memPos+i)^0x8000]=s->data8[i];
-      }
-      logW("out of QSound PCM memory for sample %d!",i);
-    } else {
-      for (int i=0; i<length; i++) {
-        qsoundMem[(memPos+i)^0x8000]=s->data8[i];
-      }
-    }
-    s->offQSound=memPos^0x8000;
-    memPos+=length+16;
-  }
-  qsoundMemLen=memPos+256;
-
-  // step 4: allocate x1-010 pcm samples
-  if (x1_010Mem==NULL) x1_010Mem=new unsigned char[1048576];
-  memset(x1_010Mem,0,1048576);
-
-  memPos=0;
-  for (int i=0; i<song.sampleLen; i++) {
-    DivSample* s=song.sample[i];
-    int paddedLen=(s->length8+4095)&(~0xfff);
-    // fit sample bank size to 128KB for Seta 2 external bankswitching logic (not emulated yet!)
-    if (paddedLen>131072) {
-      paddedLen=131072;
-    }
-    if ((memPos&0xfe0000)!=((memPos+paddedLen)&0xfe0000)) {
-      memPos=(memPos+0x1ffff)&0xfe0000;
-    }
-    if (memPos>=1048576) {
-      logW("out of X1-010 memory for sample %d!",i);
-      break;
-    }
-    if (memPos+paddedLen>=1048576) {
-      memcpy(x1_010Mem+memPos,s->data8,1048576-memPos);
-      logW("out of X1-010 memory for sample %d!",i);
-    } else {
-      memcpy(x1_010Mem+memPos,s->data8,paddedLen);
-    }
-    s->offX1_010=memPos;
-    memPos+=paddedLen;
-  }
-  x1_010MemLen=memPos+256;
 }
 
 String DivEngine::encodeSysDesc(std::vector<int>& desc) {
@@ -725,11 +619,11 @@ void DivEngine::createNew(const int* description) {
     initSongWithDesc(description);
   }
   recalcChans();
-  renderSamples();
   saveLock.unlock();
   BUSY_END;
   initDispatch();
   BUSY_BEGIN;
+  renderSamples();
   reset();
   BUSY_END;
 }
@@ -967,6 +861,11 @@ DivSample* DivEngine::getSample(int index) {
   return song.sample[index];
 }
 
+DivDispatch* DivEngine::getDispatch(int index) {
+  if (index<0 || index>=song.systemLen) return NULL;
+  return disCont[index].dispatch;
+}
+
 void DivEngine::setLoops(int loops) {
   remainingLoops=loops;
 }
@@ -2812,6 +2711,7 @@ bool DivEngine::init() {
   oscBuf[1]=new float[32768];
 
   initDispatch();
+  renderSamples();
   reset();
   active=true;
 
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 2ca301c5..dc1436ee 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -422,6 +422,7 @@ class DivEngine {
     DivInstrument* getIns(int index, DivInstrumentType fallbackType=DIV_INS_FM);
     DivWavetable* getWave(int index);
     DivSample* getSample(int index);
+    DivDispatch* getDispatch(int index);
     // parse system setup description
     String encodeSysDesc(std::vector<int>& desc);
     std::vector<int> decodeSysDesc(String desc);
@@ -849,19 +850,6 @@ class DivEngine {
     // terminate the engine.
     bool quit();
 
-    unsigned char* adpcmAMem;
-    size_t adpcmAMemLen;
-    unsigned char* adpcmBMem;
-    size_t adpcmBMemLen;
-    unsigned char* qsoundMem;
-    size_t qsoundMemLen;
-    unsigned char* qsoundAMem;
-    size_t qsoundAMemLen;
-    unsigned char* dpcmMem;
-    size_t dpcmMemLen;
-    unsigned char* x1_010Mem;
-    size_t x1_010MemLen;
-
     DivEngine():
       output(NULL),
       exportThread(NULL),
@@ -935,19 +923,7 @@ class DivEngine {
       oscSize(1),
       oscReadPos(0),
       oscWritePos(0),
-      tickMult(1),
-      adpcmAMem(NULL),
-      adpcmAMemLen(0),
-      adpcmBMem(NULL),
-      adpcmBMemLen(0),
-      qsoundMem(NULL),
-      qsoundMemLen(0),
-      qsoundAMem(NULL),
-      qsoundAMemLen(0),
-      dpcmMem(NULL),
-      dpcmMemLen(0),
-      x1_010Mem(NULL),
-      x1_010MemLen(0) {
+      tickMult(1) {
       memset(isMuted,0,DIV_MAX_CHANS*sizeof(bool));
       memset(keyHit,0,DIV_MAX_CHANS*sizeof(bool));
       memset(dispatchChanOfChan,0,DIV_MAX_CHANS*sizeof(int));
diff --git a/src/engine/fileOps.cpp b/src/engine/fileOps.cpp
index cfd23e1f..b543e3e1 100644
--- a/src/engine/fileOps.cpp
+++ b/src/engine/fileOps.cpp
@@ -899,12 +899,14 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
     song.unload();
     song=ds;
     recalcChans();
-    renderSamples();
     saveLock.unlock();
     BUSY_END;
     if (active) {
       initDispatch();
-      syncReset();
+      BUSY_BEGIN;
+      renderSamples();
+      reset();
+      BUSY_END;
     }
   } catch (EndOfFileException& e) {
     logE("premature end of file!");
@@ -1596,12 +1598,14 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
     song.unload();
     song=ds;
     recalcChans();
-    renderSamples();
     saveLock.unlock();
     BUSY_END;
     if (active) {
       initDispatch();
-      syncReset();
+      BUSY_BEGIN;
+      renderSamples();
+      reset();
+      BUSY_END;
     }
   } catch (EndOfFileException& e) {
     logE("premature end of file!");
@@ -2005,12 +2009,14 @@ bool DivEngine::loadMod(unsigned char* file, size_t len) {
     song.unload();
     song=ds;
     recalcChans();
-    renderSamples();
     saveLock.unlock();
     BUSY_END;
     if (active) {
       initDispatch();
-      syncReset();
+      BUSY_BEGIN;
+      renderSamples();
+      reset();
+      BUSY_END;
     }
     success=true;
   } catch (EndOfFileException& e) {
diff --git a/src/engine/platform/abstract.cpp b/src/engine/platform/abstract.cpp
index 91f61fc6..54366e1b 100644
--- a/src/engine/platform/abstract.cpp
+++ b/src/engine/platform/abstract.cpp
@@ -141,6 +141,22 @@ const char** DivDispatch::getRegisterSheet() {
   return NULL;
 }
 
+const void* DivDispatch::getSampleMem(int index) {
+  return NULL;
+}
+
+size_t DivDispatch::getSampleMemCapacity(int index) {
+  return 0;
+}
+
+size_t DivDispatch::getSampleMemUsage(int index) {
+  return 0;
+}
+
+void DivDispatch::renderSamples() {
+  
+}
+
 int DivDispatch::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
   return 0;
 }
diff --git a/src/engine/platform/qsound.cpp b/src/engine/platform/qsound.cpp
index c5d003be..6e89e5b6 100644
--- a/src/engine/platform/qsound.cpp
+++ b/src/engine/platform/qsound.cpp
@@ -268,8 +268,6 @@ const char* DivPlatformQSound::getEffectName(unsigned char effect) {
   return NULL;
 }
 void DivPlatformQSound::acquire(short* bufL, short* bufR, size_t start, size_t len) {
-  chip.rom_data = parent->qsoundMem;
-  chip.rom_mask = 0xffffff;
   for (size_t h=start; h<start+len; h++) {
     qsound_update(&chip);
     bufL[h]=chip.out[0];
@@ -638,6 +636,51 @@ int DivPlatformQSound::getRegisterPoolDepth() {
   return 16;
 }
 
+const void* DivPlatformQSound::getSampleMem(int index) {
+  return index == 0 ? sampleMem : NULL;
+}
+
+size_t DivPlatformQSound::getSampleMemCapacity(int index) {
+  return index == 0 ? 16777216 : 0;
+}
+
+size_t DivPlatformQSound::getSampleMemUsage(int index) {
+  return index == 0 ? sampleMemLen : 0;
+}
+
+void DivPlatformQSound::renderSamples() {
+  memset(sampleMem,0,getSampleMemCapacity());
+
+  size_t memPos=0;
+  for (int i=0; i<parent->song.sampleLen; i++) {
+    DivSample* s=parent->song.sample[i];
+    int length=s->length8;
+    if (length>65536-16) {
+      length=65536-16;
+    }
+    if ((memPos&0xff0000)!=((memPos+length)&0xff0000)) {
+      memPos=(memPos+0xffff)&0xff0000;
+    }
+    if (memPos>=getSampleMemCapacity()) {
+      logW("out of QSound PCM memory for sample %d!",i);
+      break;
+    }
+    if (memPos+length>=getSampleMemCapacity()) {
+      for (unsigned int i=0; i<getSampleMemCapacity()-(memPos+length); i++) {
+        sampleMem[(memPos+i)^0x8000]=s->data8[i];
+      }
+      logW("out of QSound PCM memory for sample %d!",i);
+    } else {
+      for (int i=0; i<length; i++) {
+        sampleMem[(memPos+i)^0x8000]=s->data8[i];
+      }
+    }
+    s->offQSound=memPos^0x8000;
+    memPos+=length+16;
+  }
+  sampleMemLen=memPos+256;
+}
+
 int DivPlatformQSound::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
   parent=p;
   dumpWrites=false;
@@ -651,8 +694,10 @@ int DivPlatformQSound::init(DivEngine* p, int channels, int sugRate, unsigned in
 
   chipClock=60000000;
   rate = qsound_start(&chip, chipClock);
-  chip.rom_data = (unsigned char*)&chip.rom_mask;
-  chip.rom_mask = 0;
+  sampleMem=new unsigned char[getSampleMemCapacity()];
+  sampleMemLen=0;
+  chip.rom_data=sampleMem;
+  chip.rom_mask=0xffffff;
   reset();
 
   for (int i=0; i<19; i++) {
@@ -662,6 +707,7 @@ int DivPlatformQSound::init(DivEngine* p, int channels, int sugRate, unsigned in
 }
 
 void DivPlatformQSound::quit() {
+  delete[] sampleMem;
   for (int i=0; i<19; i++) {
     delete oscBuf[i];
   }
diff --git a/src/engine/platform/qsound.h b/src/engine/platform/qsound.h
index 0fbce3b3..d12e952e 100644
--- a/src/engine/platform/qsound.h
+++ b/src/engine/platform/qsound.h
@@ -67,6 +67,8 @@ class DivPlatformQSound: public DivDispatch {
   int echoDelay;
   int echoFeedback;
 
+  unsigned char* sampleMem;
+  size_t sampleMemLen;
   struct qsound_chip chip;
   unsigned short regPool[512];
 
@@ -94,6 +96,10 @@ class DivPlatformQSound: public DivDispatch {
     void poke(std::vector<DivRegWrite>& wlist);
     const char** getRegisterSheet();
     const char* getEffectName(unsigned char effect);
+    const void* getSampleMem(int index = 0);
+    size_t getSampleMemCapacity(int index = 0);
+    size_t getSampleMemUsage(int index = 0);
+    void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, unsigned int flags);
     void quit();
 };
diff --git a/src/engine/platform/x1_010.cpp b/src/engine/platform/x1_010.cpp
index a2e28b51..03cd4f6b 100644
--- a/src/engine/platform/x1_010.cpp
+++ b/src/engine/platform/x1_010.cpp
@@ -19,6 +19,7 @@
 
 #include "x1_010.h"
 #include "../engine.h"
+#include "../../ta-log.h"
 #include <math.h>
 
 //#define rWrite(a,v) pendingWrites[a]=v;
@@ -909,6 +910,48 @@ void DivPlatformX1_010::poke(std::vector<DivRegWrite>& wlist) {
   for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
 }
 
+const void* DivPlatformX1_010::getSampleMem(int index) {
+  return index == 0 ? sampleMem : 0;
+}
+
+size_t DivPlatformX1_010::getSampleMemCapacity(int index) {
+  return index == 0 ? 1048576 : 0;
+}
+
+size_t DivPlatformX1_010::getSampleMemUsage(int index) {
+  return index == 0 ? sampleMemLen : 0;
+}
+
+void DivPlatformX1_010::renderSamples() {
+  memset(sampleMem,0,getSampleMemCapacity());
+
+  size_t memPos=0;
+  for (int i=0; i<parent->song.sampleLen; i++) {
+    DivSample* s=parent->song.sample[i];
+    int paddedLen=(s->length8+4095)&(~0xfff);
+    // fit sample bank size to 128KB for Seta 2 external bankswitching logic (not emulated yet!)
+    if (paddedLen>131072) {
+      paddedLen=131072;
+    }
+    if ((memPos&0xfe0000)!=((memPos+paddedLen)&0xfe0000)) {
+      memPos=(memPos+0x1ffff)&0xfe0000;
+    }
+    if (memPos>=getSampleMemCapacity()) {
+      logW("out of X1-010 memory for sample %d!",i);
+      break;
+    }
+    if (memPos+paddedLen>=getSampleMemCapacity()) {
+      memcpy(sampleMem+memPos,s->data8,getSampleMemCapacity()-memPos);
+      logW("out of X1-010 memory for sample %d!",i);
+    } else {
+      memcpy(sampleMem+memPos,s->data8,paddedLen);
+    }
+    s->offX1_010=memPos;
+    memPos+=paddedLen;
+  }
+  sampleMemLen=memPos+256;
+}
+
 int DivPlatformX1_010::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
   parent=p;
   dumpWrites=false;
@@ -919,7 +962,9 @@ int DivPlatformX1_010::init(DivEngine* p, int channels, int sugRate, unsigned in
     oscBuf[i]=new DivDispatchOscBuffer;
   }
   setFlags(flags);
-  intf.parent=parent;
+  sampleMem=new unsigned char[getSampleMemCapacity()];
+  sampleMemLen=0;
+  intf.memory=sampleMem;
   x1_010=new x1_010_core(intf);
   x1_010->reset();
   reset();
@@ -931,6 +976,7 @@ void DivPlatformX1_010::quit() {
     delete oscBuf[i];
   }
   delete x1_010;
+  delete[] sampleMem;
 }
 
 DivPlatformX1_010::~DivPlatformX1_010() {
diff --git a/src/engine/platform/x1_010.h b/src/engine/platform/x1_010.h
index 11de4bf4..939280ef 100644
--- a/src/engine/platform/x1_010.h
+++ b/src/engine/platform/x1_010.h
@@ -28,13 +28,13 @@
 
 class DivX1_010Interface: public x1_010_mem_intf {
   public:
-    DivEngine* parent;
+    unsigned char* memory;
     int sampleBank;
     virtual u8 read_byte(u32 address) override {
-      if (parent->x1_010Mem==NULL) return 0;
-      return parent->x1_010Mem[address & 0xfffff];
+      if (memory==NULL) return 0;
+      return memory[address & 0xfffff];
     }
-    DivX1_010Interface(): parent(NULL), sampleBank(0) {}
+    DivX1_010Interface(): memory(NULL), sampleBank(0) {}
 };
 
 class DivPlatformX1_010: public DivDispatch {
@@ -115,6 +115,8 @@ class DivPlatformX1_010: public DivDispatch {
   DivDispatchOscBuffer* oscBuf[16];
   bool isMuted[16];
   bool stereo=false;
+  unsigned char* sampleMem;
+  size_t sampleMemLen;
   unsigned char sampleBank;
   DivX1_010Interface intf;
   x1_010_core* x1_010;
@@ -141,6 +143,10 @@ class DivPlatformX1_010: public DivDispatch {
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
+    const void* getSampleMem(int index = 0);
+    size_t getSampleMemCapacity(int index = 0);
+    size_t getSampleMemUsage(int index = 0);
+    void renderSamples();
     const char** getRegisterSheet();
     const char* getEffectName(unsigned char effect);
     int init(DivEngine* parent, int channels, int sugRate, unsigned int flags);
diff --git a/src/engine/platform/ym2610.cpp b/src/engine/platform/ym2610.cpp
index 5154acc6..3711515a 100644
--- a/src/engine/platform/ym2610.cpp
+++ b/src/engine/platform/ym2610.cpp
@@ -20,6 +20,7 @@
 #include "ym2610.h"
 #include "sound/ymfm/ymfm.h"
 #include "../engine.h"
+#include "../../ta-log.h"
 #include <string.h>
 #include <math.h>
 
@@ -245,6 +246,85 @@ const char* regCheatSheetYM2610[]={
   NULL
 };
 
+const void* DivPlatformYM2610Base::getSampleMem(int index) {
+  return index == 0 ? adpcmAMem : index == 1 ? adpcmBMem : NULL;
+}
+
+size_t DivPlatformYM2610Base::getSampleMemCapacity(int index) {
+  return index == 0 ? 16777216 : index == 1 ? 16777216 : 0;
+}
+
+size_t DivPlatformYM2610Base::getSampleMemUsage(int index) {
+  return index == 0 ? adpcmAMemLen : index == 1 ? adpcmBMemLen : 0;
+}
+
+void DivPlatformYM2610Base::renderSamples() {
+  memset(adpcmAMem,0,getSampleMemCapacity(0));
+
+  size_t memPos=0;
+  for (int i=0; i<parent->song.sampleLen; i++) {
+    DivSample* s=parent->song.sample[i];
+    int paddedLen=(s->lengthA+255)&(~0xff);
+    if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
+      memPos=(memPos+0xfffff)&0xf00000;
+    }
+    if (memPos>=getSampleMemCapacity(0)) {
+      logW("out of ADPCM-A memory for sample %d!",i);
+      break;
+    }
+    if (memPos+paddedLen>=getSampleMemCapacity(0)) {
+      memcpy(adpcmAMem+memPos,s->dataA,getSampleMemCapacity(0)-memPos);
+      logW("out of ADPCM-A memory for sample %d!",i);
+    } else {
+      memcpy(adpcmAMem+memPos,s->dataA,paddedLen);
+    }
+    s->offA=memPos;
+    memPos+=paddedLen;
+  }
+  adpcmAMemLen=memPos+256;
+
+  memset(adpcmBMem,0,getSampleMemCapacity(1));
+
+  memPos=0;
+  for (int i=0; i<parent->song.sampleLen; i++) {
+    DivSample* s=parent->song.sample[i];
+    int paddedLen=(s->lengthB+255)&(~0xff);
+    if ((memPos&0xf00000)!=((memPos+paddedLen)&0xf00000)) {
+      memPos=(memPos+0xfffff)&0xf00000;
+    }
+    if (memPos>=getSampleMemCapacity(1)) {
+      logW("out of ADPCM-B memory for sample %d!",i);
+      break;
+    }
+    if (memPos+paddedLen>=getSampleMemCapacity(1)) {
+      memcpy(adpcmBMem+memPos,s->dataB,getSampleMemCapacity(1)-memPos);
+      logW("out of ADPCM-B memory for sample %d!",i);
+    } else {
+      memcpy(adpcmBMem+memPos,s->dataB,paddedLen);
+    }
+    s->offB=memPos;
+    memPos+=paddedLen;
+  }
+  adpcmBMemLen=memPos+256;
+}
+
+int DivPlatformYM2610Base::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
+  parent=p;
+  adpcmAMem=new unsigned char[getSampleMemCapacity(0)];
+  adpcmAMemLen=0;
+  adpcmBMem=new unsigned char[getSampleMemCapacity(1)];
+  adpcmBMemLen=0;
+  iface.adpcmAMem=adpcmAMem;
+  iface.adpcmBMem=adpcmBMem;
+  iface.sampleBank=0;
+  return 0;
+}
+
+void DivPlatformYM2610Base::quit() {
+  delete[] adpcmAMem;
+  delete[] adpcmBMem;
+}
+
 const char** DivPlatformYM2610::getRegisterSheet() {
   return regCheatSheetYM2610;
 }
@@ -1185,7 +1265,7 @@ void DivPlatformYM2610::setSkipRegisterWrites(bool value) {
 }
 
 int DivPlatformYM2610::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
-  parent=p;
+  DivPlatformYM2610Base::init(p, channels, sugRate, flags);
   dumpWrites=false;
   skipRegisterWrites=false;
   for (int i=0; i<14; i++) {
@@ -1197,8 +1277,6 @@ int DivPlatformYM2610::init(DivEngine* p, int channels, int sugRate, unsigned in
   for (int i=0; i<14; i++) {
     oscBuf[i]->rate=rate;
   }
-  iface.parent=parent;
-  iface.sampleBank=0;
   fm=new ymfm::ym2610(iface);
   // YM2149, 2MHz
   ay=new DivPlatformAY8910;
@@ -1215,6 +1293,7 @@ void DivPlatformYM2610::quit() {
   ay->quit();
   delete ay;
   delete fm;
+  DivPlatformYM2610Base::quit();
 }
 
 DivPlatformYM2610::~DivPlatformYM2610() {
diff --git a/src/engine/platform/ym2610.h b/src/engine/platform/ym2610.h
index c46bc3c4..45ecb335 100644
--- a/src/engine/platform/ym2610.h
+++ b/src/engine/platform/ym2610.h
@@ -27,14 +27,32 @@
 
 class DivYM2610Interface: public ymfm::ymfm_interface {
   public:
-    DivEngine* parent;
+    unsigned char* adpcmAMem;
+    unsigned char* adpcmBMem;
     int sampleBank;
     uint8_t ymfm_external_read(ymfm::access_class type, uint32_t address);
     void ymfm_external_write(ymfm::access_class type, uint32_t address, uint8_t data);
-    DivYM2610Interface(): parent(NULL), sampleBank(0) {}
+    DivYM2610Interface(): adpcmAMem(NULL), adpcmBMem(NULL), sampleBank(0) {}
 };
 
-class DivPlatformYM2610: public DivDispatch {
+class DivPlatformYM2610Base: public DivDispatch {
+  protected:
+    unsigned char* adpcmAMem;
+    size_t adpcmAMemLen;
+    unsigned char* adpcmBMem;
+    size_t adpcmBMemLen;
+    DivYM2610Interface iface;
+
+  public:
+    const void* getSampleMem(int index);
+    size_t getSampleMemCapacity(int index);
+    size_t getSampleMemUsage(int index);
+    void renderSamples();
+    int init(DivEngine* parent, int channels, int sugRate, unsigned int flags);
+    void quit();
+};
+
+class DivPlatformYM2610: public DivPlatformYM2610Base {
   protected:
     const unsigned short chanOffs[4]={
       0x01, 0x02, 0x101, 0x102
@@ -93,7 +111,6 @@ class DivPlatformYM2610: public DivDispatch {
     std::queue<QueuedWrite> writes;
     ymfm::ym2610* fm;
     ymfm::ym2610::output_data fmout;
-    DivYM2610Interface iface;
 
     DivPlatformAY8910* ay;
     unsigned char regPool[512];
diff --git a/src/engine/platform/ym2610Interface.cpp b/src/engine/platform/ym2610Interface.cpp
index 9154b40e..d442ce34 100644
--- a/src/engine/platform/ym2610Interface.cpp
+++ b/src/engine/platform/ym2610Interface.cpp
@@ -24,13 +24,11 @@
 uint8_t DivYM2610Interface::ymfm_external_read(ymfm::access_class type, uint32_t address) {
   switch (type) {
     case ymfm::ACCESS_ADPCM_A:
-      if (parent->adpcmAMem==NULL) return 0;
-      if ((address&0xffffff)>=parent->adpcmAMemLen) return 0;
-      return parent->adpcmAMem[address&0xffffff];
+      if (adpcmAMem==NULL) return 0;
+      return adpcmAMem[address&0xffffff];
     case ymfm::ACCESS_ADPCM_B:
-      if (parent->adpcmBMem==NULL) return 0;
-      if ((address&0xffffff)>=parent->adpcmBMemLen) return 0;
-      return parent->adpcmBMem[address&0xffffff];
+      if (adpcmBMem==NULL) return 0;
+      return adpcmBMem[address&0xffffff];
     default:
       return 0;
   }
diff --git a/src/engine/platform/ym2610b.cpp b/src/engine/platform/ym2610b.cpp
index a0f1a6e3..9c126c2b 100644
--- a/src/engine/platform/ym2610b.cpp
+++ b/src/engine/platform/ym2610b.cpp
@@ -1243,7 +1243,7 @@ void DivPlatformYM2610B::setSkipRegisterWrites(bool value) {
 }
 
 int DivPlatformYM2610B::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
-  parent=p;
+  DivPlatformYM2610Base::init(p, channels, sugRate, flags);
   dumpWrites=false;
   skipRegisterWrites=false;
   for (int i=0; i<16; i++) {
@@ -1255,8 +1255,6 @@ int DivPlatformYM2610B::init(DivEngine* p, int channels, int sugRate, unsigned i
   for (int i=0; i<16; i++) {
     oscBuf[i]->rate=rate;
   }
-  iface.parent=parent;
-  iface.sampleBank=0;
   fm=new ymfm::ym2610b(iface);
   // YM2149, 2MHz
   ay=new DivPlatformAY8910;
@@ -1273,6 +1271,7 @@ void DivPlatformYM2610B::quit() {
   ay->quit();
   delete ay;
   delete fm;
+  DivPlatformYM2610Base::quit();
 }
 
 DivPlatformYM2610B::~DivPlatformYM2610B() {
diff --git a/src/engine/platform/ym2610b.h b/src/engine/platform/ym2610b.h
index df0a8323..d1af3069 100644
--- a/src/engine/platform/ym2610b.h
+++ b/src/engine/platform/ym2610b.h
@@ -26,7 +26,7 @@
 
 #include "ym2610.h"
 
-class DivPlatformYM2610B: public DivDispatch {
+class DivPlatformYM2610B: public DivPlatformYM2610Base {
   protected:
     const unsigned short chanOffs[6]={
       0x00, 0x01, 0x02, 0x100, 0x101, 0x102
@@ -85,7 +85,6 @@ class DivPlatformYM2610B: public DivDispatch {
     std::queue<QueuedWrite> writes;
     ymfm::ym2610b* fm;
     ymfm::ym2610b::output_data fmout;
-    DivYM2610Interface iface;
     unsigned char regPool[512];
     unsigned char lastBusy;
   
diff --git a/src/engine/vgmOps.cpp b/src/engine/vgmOps.cpp
index 7817c060..53800a52 100644
--- a/src/engine/vgmOps.cpp
+++ b/src/engine/vgmOps.cpp
@@ -713,10 +713,10 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
   bool writeDACSamples=false;
   bool writeNESSamples=false;
   bool writePCESamples=false;
-  int writeADPCM=0;
+  DivDispatch* writeADPCM[2]={NULL,NULL};
   int writeSegaPCM=0;
-  int writeX1010=0;
-  int writeQSound=0;
+  DivDispatch* writeX1010[2]={NULL,NULL};
+  DivDispatch* writeQSound[2]={NULL,NULL};
 
   for (int i=0; i<song.systemLen; i++) {
     willExport[i]=false;
@@ -805,11 +805,11 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
         if (!hasX1) {
           hasX1=disCont[i].dispatch->chipClock;
           willExport[i]=true;
-          writeX1010=1;
+          writeX1010[0]=disCont[i].dispatch;
         } else if (!(hasX1&0x40000000)) {
           isSecond[i]=true;
           willExport[i]=true;
-          writeX1010=2;
+          writeX1010[1]=disCont[i].dispatch;
           hasX1|=0x40000000;
           howManyChips++;
         }
@@ -823,11 +823,11 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
         if (!hasOPNB) {
           hasOPNB=disCont[i].dispatch->chipClock;
           willExport[i]=true;
-          writeADPCM=1;
+          writeADPCM[0]=disCont[i].dispatch;
         } else if (!(hasOPNB&0x40000000)) {
           isSecond[i]=true;
           willExport[i]=true;
-          writeADPCM=2;
+          writeADPCM[1]=disCont[i].dispatch;
           hasOPNB|=0x40000000;
           howManyChips++;
         }
@@ -929,11 +929,11 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
           // not be able to handle the 64kb sample bank trick
           hasQSound=disCont[i].dispatch->chipClock;
           willExport[i]=true;
-          writeQSound=1;
+          writeQSound[0]=disCont[i].dispatch;
         } else if (!(hasQSound&0x40000000)) {
           isSecond[i]=true;
           willExport[i]=false;
-          writeQSound=2;
+          writeQSound[1]=disCont[i].dispatch;
           addWarning("dual QSound is not supported by the VGM format");
         }
         break;
@@ -1249,56 +1249,55 @@ SafeWriter* DivEngine::saveVGM(bool* sysToExport, bool loop, int version) {
     delete[] pcmMem;
   }
 
-  if (adpcmAMemLen>0) {
-    for (int i=0; i<writeADPCM; i++) {
+  for (int i=0; i<2; i++) {
+    if (writeADPCM[i]!=NULL && writeADPCM[i]->getSampleMemUsage(0)>0) {
       w->writeC(0x67);
       w->writeC(0x66);
       w->writeC(0x82);
-      w->writeI((adpcmAMemLen+8)|(i*0x80000000));
-      w->writeI(adpcmAMemLen);
+      w->writeI((writeADPCM[i]->getSampleMemUsage(0)+8)|(i*0x80000000));
+      w->writeI(writeADPCM[i]->getSampleMemCapacity(0));
       w->writeI(0);
-      w->write(adpcmAMem,adpcmAMemLen);
+      w->write(writeADPCM[i]->getSampleMem(0),writeADPCM[i]->getSampleMemUsage(0));
     }
   }
 
-  if (adpcmBMemLen>0) {
-    for (int i=0; i<writeADPCM; i++) {
+  for (int i=0; i<2; i++) {
+    if (writeADPCM[i]!=NULL && writeADPCM[i]->getSampleMemUsage(1)>0) {
       w->writeC(0x67);
       w->writeC(0x66);
       w->writeC(0x83);
-      w->writeI((adpcmBMemLen+8)|(i*0x80000000));
-      w->writeI(adpcmBMemLen);
+      w->writeI((writeADPCM[i]->getSampleMemUsage(1)+8)|(i*0x80000000));
+      w->writeI(writeADPCM[i]->getSampleMemCapacity(1));
       w->writeI(0);
-      w->write(adpcmBMem,adpcmBMemLen);
+      w->write(writeADPCM[i]->getSampleMem(1),writeADPCM[i]->getSampleMemUsage(1));
     }
   }
 
-  if (qsoundMemLen>0) {
-    // always write a whole bank
-    unsigned int blockSize=(qsoundMemLen+0xffff)&(~0xffff);
-    if (blockSize > 0x1000000) {
-      blockSize = 0x1000000;
-    }
-    for (int i=0; i<writeQSound; i++) {
+  for (int i=0; i<2; i++) {
+    if (writeQSound[i]!=NULL && writeQSound[i]->getSampleMemUsage()>0) {
+      unsigned int blockSize=(writeQSound[i]->getSampleMemUsage()+0xffff)&(~0xffff);
+      if (blockSize > 0x1000000) {
+        blockSize = 0x1000000;
+      }
       w->writeC(0x67);
       w->writeC(0x66);
       w->writeC(0x8F);
       w->writeI((blockSize+8)|(i*0x80000000));
-      w->writeI(0x1000000);
+      w->writeI(writeQSound[i]->getSampleMemCapacity());
       w->writeI(0);
-      w->write(qsoundMem,blockSize);
+      w->write(writeQSound[i]->getSampleMem(),blockSize);
     }
   }
 
-  if (x1_010MemLen>0) {
-    for (int i=0; i<writeX1010; i++) {
+  for (int i=0; i<2; i++) {
+    if (writeX1010[i]!=NULL && writeX1010[i]->getSampleMemUsage()>0) {
       w->writeC(0x67);
       w->writeC(0x66);
       w->writeC(0x91);
-      w->writeI((x1_010MemLen+8)|(i*0x80000000));
-      w->writeI(x1_010MemLen);
+      w->writeI((writeX1010[i]->getSampleMemUsage()+8)|(i*0x80000000));
+      w->writeI(writeX1010[i]->getSampleMemCapacity());
       w->writeI(0);
-      w->write(x1_010Mem,x1_010MemLen);
+      w->write(writeX1010[i]->getSampleMem(),writeX1010[i]->getSampleMemUsage());
     }
   }
 
diff --git a/src/gui/stats.cpp b/src/gui/stats.cpp
index 274be2ed..35d6cfc4 100644
--- a/src/gui/stats.cpp
+++ b/src/gui/stats.cpp
@@ -28,22 +28,17 @@ void FurnaceGUI::drawStats() {
   }
   if (!statsOpen) return;
   if (ImGui::Begin("Statistics",&statsOpen)) {
-    String adpcmAUsage=fmt::sprintf("%d/16384KB",e->adpcmAMemLen/1024);
-    String adpcmBUsage=fmt::sprintf("%d/16384KB",e->adpcmBMemLen/1024);
-    String qsoundUsage=fmt::sprintf("%d/16384KB",e->qsoundMemLen/1024);
-    String x1_010Usage=fmt::sprintf("%d/1024KB",e->x1_010MemLen/1024);
-    ImGui::Text("ADPCM-A");
-    ImGui::SameLine();
-    ImGui::ProgressBar(((float)e->adpcmAMemLen)/16777216.0f,ImVec2(-FLT_MIN,0),adpcmAUsage.c_str());
-    ImGui::Text("ADPCM-B");
-    ImGui::SameLine();
-    ImGui::ProgressBar(((float)e->adpcmBMemLen)/16777216.0f,ImVec2(-FLT_MIN,0),adpcmBUsage.c_str());
-    ImGui::Text("QSound");
-    ImGui::SameLine();
-    ImGui::ProgressBar(((float)e->qsoundMemLen)/16777216.0f,ImVec2(-FLT_MIN,0),qsoundUsage.c_str());
-    ImGui::Text("X1-010");
-    ImGui::SameLine();
-    ImGui::ProgressBar(((float)e->x1_010MemLen)/1048576.0f,ImVec2(-FLT_MIN,0),x1_010Usage.c_str());
+    for (int i=0; i<e->song.systemLen; i++) {
+      DivDispatch* dispatch=e->getDispatch(i);
+      for (int j=0; dispatch!=NULL && dispatch->getSampleMemCapacity(j)>0; j++) {
+        size_t capacity=dispatch->getSampleMemCapacity(j);
+        size_t usage=dispatch->getSampleMemUsage(j);
+        String usageStr=fmt::sprintf("%d/%dKB",usage/1024,capacity/1024);
+        ImGui::Text("%s [%d]", e->getSystemName(e->song.system[i]), j);
+        ImGui::SameLine();
+        ImGui::ProgressBar(((float)usage)/((float)capacity),ImVec2(-FLT_MIN,0),usageStr.c_str());
+      }
+    }
   }
   if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) curWindow=GUI_WINDOW_STATS;
   ImGui::End();