diff --git a/src/engine/platform/snes.cpp b/src/engine/platform/snes.cpp
index dfb5bca4..9cc47fae 100644
--- a/src/engine/platform/snes.cpp
+++ b/src/engine/platform/snes.cpp
@@ -93,24 +93,15 @@ void DivPlatformSNES::tick(bool sysTick) {
   // so they have to be accumulated
   unsigned char kon=0;
   unsigned char koff=0;
+  bool writeControl=false;
+  bool writeNoise=false;
+  bool writePitchMod=false;
+  bool writeEcho=false;
   for (int i=0; i<8; i++) {
-    //bool hadGain=chan[i].std.vol.had || chan[i].std.ex1.had || chan[i].std.ex2.had;
     chan[i].std.next();
     if (chan[i].std.vol.had) {
       chan[i].outVol=VOL_SCALE_LOG(chan[i].vol&127,MIN(127,chan[i].std.vol.val),127);
     }
-    /*
-    if (chan[i].std.vol.had) {
-      chWrite(i,7,MIN(127,chan[i].std.vol.val*2));
-    } else if (!chan[i].state.useEnv && hadGain) {
-      if (chan[i].std.ex1.val==0) {
-        // direct gain
-        chWrite(i,7,chan[i].std.vol.val);
-      } else {
-        // inc/dec
-        chWrite(i,7,chan[i].std.ex2.val|((chan[i].std.ex1.val-1)<<5)|0x80);
-      }
-    }*/
     if (chan[i].std.arp.had) {
       if (!chan[i].inPorta) {
         if (chan[i].std.arp.mode) {
@@ -126,6 +117,10 @@ void DivPlatformSNES::tick(bool sysTick) {
         chan[i].freqChanged=true;
       }
     }
+    if (chan[i].std.duty.had) {
+      noiseFreq=chan[i].std.duty.val;
+      writeControl=true;
+    }
     if (chan[i].useWave && chan[i].std.wave.had) {
       if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
         chan[i].wave=chan[i].std.wave.val;
@@ -149,7 +144,30 @@ void DivPlatformSNES::tick(bool sysTick) {
       int val=chan[i].std.panR.val&0x7f;
       chan[i].panR=(val<<1)|(val>>6);
     }
-    if (chan[i].std.vol.had || chan[i].std.panL.had || chan[i].std.panR.had) {
+    bool hasInverted=false;
+    if (chan[i].std.ex1.had) {
+      if (chan[i].invertL!=(chan[i].std.ex1.val&16)) {
+        chan[i].invertL=chan[i].std.ex1.val&16;
+        hasInverted=true;
+      }
+      if (chan[i].invertR!=(chan[i].std.ex1.val&8)) {
+        chan[i].invertR=chan[i].std.ex1.val&8;
+        hasInverted=true;
+      }
+      if (chan[i].pitchMod!=(chan[i].std.ex1.val&4)) {
+        chan[i].pitchMod=chan[i].std.ex1.val&4;
+        writePitchMod=true;
+      }
+      if (chan[i].echo!=(chan[i].std.ex1.val&2)) {
+        chan[i].echo=chan[i].std.ex1.val&2;
+        writeEcho=true;
+      }
+      if (chan[i].noise!=(chan[i].std.ex1.val&1)) {
+        chan[i].noise=chan[i].std.ex1.val&1;
+        writeNoise=true;
+      }
+    }
+    if (chan[i].std.vol.had || chan[i].std.panL.had || chan[i].std.panR.had || hasInverted) {
       writeOutVol(i);
     }
     if (chan[i].setPos) {
@@ -173,29 +191,6 @@ void DivPlatformSNES::tick(bool sysTick) {
       if (chan[i].keyOn) {
         unsigned int start, end, loop;
         unsigned short tabAddr=sampleTableAddr(i);
-        if (chan[i].state.useEnv) {
-          chWrite(i,5,chan[i].state.a|(chan[i].state.d<<4)|0x80);
-          chWrite(i,6,chan[i].state.r|(chan[i].state.s<<5));
-        } else {
-          chWrite(i,5,0);
-          switch (chan[i].state.gainMode) {
-            case DivInstrumentSNES::GAIN_MODE_DIRECT:
-              chWrite(i,7,chan[i].state.gain&127);
-              break;
-            case DivInstrumentSNES::GAIN_MODE_DEC_LINEAR:
-              chWrite(i,7,0x80|(chan[i].state.gain&31));
-              break;
-            case DivInstrumentSNES::GAIN_MODE_INC_LINEAR:
-              chWrite(i,7,0xc0|(chan[i].state.gain&31));
-              break;
-            case DivInstrumentSNES::GAIN_MODE_DEC_LOG:
-              chWrite(i,7,0xa0|(chan[i].state.gain&31));
-              break;
-            case DivInstrumentSNES::GAIN_MODE_INC_INVLOG:
-              chWrite(i,7,0xe0|(chan[i].state.gain&31));
-              break;
-          }
-        }
         if (chan[i].useWave) {
           start=waveTableAddr(i);
           loop=start;
@@ -228,6 +223,49 @@ void DivPlatformSNES::tick(bool sysTick) {
       }
     }
   }
+  if (writeControl) {
+    unsigned char control=noiseFreq&0x1f;
+    rWrite(0x6c,control);
+  }
+  if (writeNoise) {
+    unsigned char noiseBits=(
+      (chan[0].noise?1:0)|
+      (chan[1].noise?2:0)|
+      (chan[2].noise?4:0)|
+      (chan[3].noise?8:0)|
+      (chan[4].noise?0x10:0)|
+      (chan[5].noise?0x20:0)|
+      (chan[6].noise?0x40:0)|
+      (chan[7].noise?0x80:0)
+    );
+    rWrite(0x3d,noiseBits);
+  }
+  if (writePitchMod) {
+    unsigned char pitchModBits=(
+      (chan[0].pitchMod?1:0)|
+      (chan[1].pitchMod?2:0)|
+      (chan[2].pitchMod?4:0)|
+      (chan[3].pitchMod?8:0)|
+      (chan[4].pitchMod?0x10:0)|
+      (chan[5].pitchMod?0x20:0)|
+      (chan[6].pitchMod?0x40:0)|
+      (chan[7].pitchMod?0x80:0)
+    );
+    rWrite(0x2d,pitchModBits);
+  }
+  if (writeEcho) {
+    unsigned char echoBits=(
+      (chan[0].echo?1:0)|
+      (chan[1].echo?2:0)|
+      (chan[2].echo?4:0)|
+      (chan[3].echo?8:0)|
+      (chan[4].echo?0x10:0)|
+      (chan[5].echo?0x20:0)|
+      (chan[6].echo?0x40:0)|
+      (chan[7].echo?0x80:0)
+    );
+    rWrite(0x4d,echoBits);
+  }
   if (kon!=0) {
     rWrite(0x4c,kon);
   }
@@ -260,6 +298,29 @@ int DivPlatformSNES::dispatch(DivCommand c) {
       if (chan[c.chan].insChanged) {
         chan[c.chan].state=ins->snes;
       }
+      if (chan[c.chan].state.useEnv) {
+          chWrite(c.chan,5,chan[c.chan].state.a|(chan[c.chan].state.d<<4)|0x80);
+          chWrite(c.chan,6,chan[c.chan].state.r|(chan[c.chan].state.s<<5));
+        } else {
+          chWrite(c.chan,5,0);
+          switch (chan[c.chan].state.gainMode) {
+            case DivInstrumentSNES::GAIN_MODE_DIRECT:
+              chWrite(c.chan,7,chan[c.chan].state.gain&127);
+              break;
+            case DivInstrumentSNES::GAIN_MODE_DEC_LINEAR:
+              chWrite(c.chan,7,0x80|(chan[c.chan].state.gain&31));
+              break;
+            case DivInstrumentSNES::GAIN_MODE_INC_LINEAR:
+              chWrite(c.chan,7,0xc0|(chan[c.chan].state.gain&31));
+              break;
+            case DivInstrumentSNES::GAIN_MODE_DEC_LOG:
+              chWrite(c.chan,7,0xa0|(chan[c.chan].state.gain&31));
+              break;
+            case DivInstrumentSNES::GAIN_MODE_INC_INVLOG:
+              chWrite(c.chan,7,0xe0|(chan[c.chan].state.gain&31));
+              break;
+          }
+        }
       if (c.value!=DIV_NOTE_NULL) {
         chan[c.chan].baseFreq=round(NOTE_FREQUENCY(c.value));
         chan[c.chan].freqChanged=true;
@@ -375,6 +436,8 @@ void DivPlatformSNES::writeOutVol(int ch) {
   if (!isMuted[ch]) {
     outL=(globalVolL*((chan[ch].outVol*chan[ch].panL)/127))/127;
     outR=(globalVolR*((chan[ch].outVol*chan[ch].panR)/127))/127;
+    if (chan[ch].invertL) outL=-outL;
+    if (chan[ch].invertR) outR=-outR;
   }
   chWrite(ch,0,outL);
   chWrite(ch,1,outR);
diff --git a/src/engine/platform/snes.h b/src/engine/platform/snes.h
index 44efef92..a2fec4b2 100644
--- a/src/engine/platform/snes.h
+++ b/src/engine/platform/snes.h
@@ -33,7 +33,7 @@ class DivPlatformSNES: public DivDispatch {
     int sample, wave, ins;
     int note;
     int panL, panR;
-    bool active, insChanged, freqChanged, keyOn, keyOff, inPorta, useWave, setPos;
+    bool active, insChanged, freqChanged, keyOn, keyOff, inPorta, useWave, setPos, noise, echo, pitchMod, invertL, invertR;
     int vol, outVol;
     int wtLen;
     DivInstrumentSNES state;
@@ -63,6 +63,7 @@ class DivPlatformSNES: public DivDispatch {
       inPorta(false),
       useWave(false),
       setPos(false),
+      noise(false),
       vol(127),
       outVol(127),
       wtLen(16) {} 
@@ -71,6 +72,7 @@ class DivPlatformSNES: public DivDispatch {
   DivDispatchOscBuffer* oscBuf[8];
   bool isMuted[8];
   signed char globalVolL, globalVolR;
+  unsigned char noiseFreq;
   size_t sampleTableBase;
 
   struct QueuedWrite {
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index f6036ca7..15434a80 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -227,6 +227,10 @@ const char* saaEnvBits[9]={
   "mirror", "loop", "cut", "direction", "resolution", "fixed", "N/A","enabled", NULL
 };
 
+const char* snesModeBits[6]={
+  "noise", "echo", "pitch mod", "invert right", "invert left", NULL
+};
+
 const char* filtModeBits[5]={
   "low", "band", "high", "ch3off", NULL
 };
@@ -4380,9 +4384,12 @@ void FurnaceGUI::drawInsEdit() {
             dutyLabel="Noise";
             dutyMax=ins->amiga.useSample?0:8;
           }
+          if (ins->type==DIV_INS_SNES) {
+            dutyLabel="Noise Freq";
+            dutyMax=31;
+          }
           if (ins->type==DIV_INS_OPLL || ins->type==DIV_INS_OPL || ins->type==DIV_INS_OPL_DRUMS ||
-              ins->type==DIV_INS_VRC6_SAW || ins->type==DIV_INS_FDS || ins->type==DIV_INS_MULTIPCM ||
-              ins->type==DIV_INS_SNES) {
+              ins->type==DIV_INS_VRC6_SAW || ins->type==DIV_INS_FDS || ins->type==DIV_INS_MULTIPCM) {
             dutyMax=0;
           }
           if (ins->type==DIV_INS_VERA) {
@@ -4504,9 +4511,9 @@ void FurnaceGUI::drawInsEdit() {
             ex1Max=65535;
             ex2Max=65535;
           }
-          if (ins->type==DIV_INS_SNES && !ins->snes.useEnv) {
-            ex1Max=4;
-            ex2Max=31;
+          if (ins->type==DIV_INS_SNES) {
+            ex1Max=5;
+            ex2Max=5;
           }
 
           int panMin=0;
@@ -4557,6 +4564,10 @@ void FurnaceGUI::drawInsEdit() {
             panMax=127;
             panSingleNoBit=true;
           }
+          if (ins->type==DIV_INS_SNES) {
+            panMin=0;
+            panMax=127;
+          }
           if (ins->type==DIV_INS_ES5506) {
             panMax=65535;
           }
@@ -4649,7 +4660,7 @@ void FurnaceGUI::drawInsEdit() {
             } else if (ins->type==DIV_INS_QSOUND) {
               macroList.push_back(FurnaceGUIMacroDesc("Echo Feedback",&ins->std.ex1Macro,0,ex1Max,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             } else if (ins->type==DIV_INS_SNES) {
-              macroList.push_back(FurnaceGUIMacroDesc("Gain Mode",&ins->std.ex1Macro,0,ex1Max,64,uiColors[GUI_COLOR_MACRO_VOLUME],false,NULL,NULL,false,snesGainModes));
+              macroList.push_back(FurnaceGUIMacroDesc("Special",&ins->std.ex1Macro,0,ex1Max,96,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,snesModeBits));
             } else {
               macroList.push_back(FurnaceGUIMacroDesc("Duty",&ins->std.ex1Macro,0,ex1Max,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             }
@@ -4668,7 +4679,7 @@ void FurnaceGUI::drawInsEdit() {
             } else if (ins->type==DIV_INS_QSOUND) {
               macroList.push_back(FurnaceGUIMacroDesc("Echo Length",&ins->std.ex2Macro,0,ex2Max,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             } else if (ins->type==DIV_INS_SNES) {
-              macroList.push_back(FurnaceGUIMacroDesc("Gain Rate",&ins->std.ex2Macro,0,ex2Max,160,uiColors[GUI_COLOR_MACRO_VOLUME]));
+              macroList.push_back(FurnaceGUIMacroDesc("Gain Mode",&ins->std.ex2Macro,0,ex2Max,64,uiColors[GUI_COLOR_MACRO_VOLUME],false,NULL,NULL,false,snesGainModes));
             } else {
               macroList.push_back(FurnaceGUIMacroDesc("Envelope",&ins->std.ex2Macro,0,ex2Max,ex2Bit?64:160,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,ex2Bit,ayEnvBits));
             }
@@ -4708,6 +4719,9 @@ void FurnaceGUI::drawInsEdit() {
             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("Control",&ins->std.algMacro,0,1,32,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,es5506ControlModes));
           }
+          if (ins->type==DIV_INS_SNES) {
+            macroList.push_back(FurnaceGUIMacroDesc("Gain Rate",&ins->std.ex3Macro,0,127,160,uiColors[GUI_COLOR_MACRO_VOLUME]));
+          }
 
           drawMacros(macroList);
           ImGui::EndTabItem();