diff --git a/src/engine/platform/sms.cpp b/src/engine/platform/sms.cpp
index 14427072..60cb13c5 100644
--- a/src/engine/platform/sms.cpp
+++ b/src/engine/platform/sms.cpp
@@ -129,7 +129,7 @@ void DivPlatformSMS::tick(bool sysTick) {
       if (chan[i].outVol<0) chan[i].outVol=0;
       // old formula
       // ((chan[i].vol&15)*MIN(15,chan[i].std.vol.val))>>4;
-      rWrite(0,0x90|(i<<5)|(isMuted[i]?15:(15-(chan[i].outVol&15))));
+      chan[i].writeVol=true;
     }
     if (chan[i].std.arp.had) {
       if (!chan[i].inPorta) {
@@ -235,6 +235,12 @@ void DivPlatformSMS::tick(bool sysTick) {
     chan[3].freqChanged=false;
     updateSNMode=false;
   }
+  for (int i=0; i<4; i++) {
+    if (chan[i].writeVol) {
+      rWrite(0,0x90|(i<<5)|(isMuted[i]?15:(15-(chan[i].outVol&15))));
+      chan[i].writeVol=false;
+    }
+  }
 }
 
 int DivPlatformSMS::dispatch(DivCommand c) {
@@ -250,7 +256,9 @@ int DivPlatformSMS::dispatch(DivCommand c) {
       }
       chan[c.chan].active=true;
       //if (!parent->song.brokenOutVol2) {
-        rWrite(0,0x90|c.chan<<5|(isMuted[c.chan]?15:(15-(chan[c.chan].vol&15))));
+        chan[c.chan].writeVol=true;
+        chan[c.chan].outVol=chan[c.chan].vol;
+        //rWrite(0,0x90|c.chan<<5|(isMuted[c.chan]?15:(15-(chan[c.chan].vol&15))));
       //}
       chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_STD));
       if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
@@ -276,7 +284,9 @@ int DivPlatformSMS::dispatch(DivCommand c) {
         if (!chan[c.chan].std.vol.has) {
           chan[c.chan].outVol=c.value;
         }
-        if (chan[c.chan].active) rWrite(0,0x90|c.chan<<5|(isMuted[c.chan]?15:(15-(chan[c.chan].vol&15))));
+        if (chan[c.chan].active) {
+          chan[c.chan].writeVol=true;
+        }
       }
       break;
     case DIV_CMD_GET_VOLUME:
@@ -356,7 +366,7 @@ int DivPlatformSMS::dispatch(DivCommand c) {
 
 void DivPlatformSMS::muteChannel(int ch, bool mute) {
   isMuted[ch]=mute;
-  if (chan[ch].active) rWrite(0,0x90|ch<<5|(isMuted[ch]?15:(15-(chan[ch].outVol&15))));
+  if (chan[ch].active) chan[ch].writeVol=true;
 }
 
 void DivPlatformSMS::forceIns() {
diff --git a/src/engine/platform/sms.h b/src/engine/platform/sms.h
index 0a4b121f..e636b9d8 100644
--- a/src/engine/platform/sms.h
+++ b/src/engine/platform/sms.h
@@ -31,7 +31,7 @@ extern "C" {
 class DivPlatformSMS: public DivDispatch {
   struct Channel {
     int freq, baseFreq, pitch, pitch2, note, actualNote, ins;
-    bool active, insChanged, freqChanged, keyOn, keyOff, inPorta;
+    bool active, insChanged, freqChanged, keyOn, keyOff, inPorta, writeVol;
     signed char vol, outVol;
     DivMacroInt std;
     void macroInit(DivInstrument* which) {
@@ -52,6 +52,7 @@ class DivPlatformSMS: public DivDispatch {
       keyOn(false),
       keyOff(false),
       inPorta(false),
+      writeVol(false),
       vol(15),
       outVol(15) {}
   };