diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index a8d5c525..066e4744 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -472,9 +472,9 @@ void DivPlatformGenesis::tick(bool sysTick) {
     if (i==2 && extMode) continue;
     if (chan[i].freqChanged) {
       if (parent->song.linearPitch==2) {
-        chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
+        chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
       } else {
-        int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
+        int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
         int block=(chan[i].baseFreq&0xf800)>>11;
         if (fNum<0) fNum=0;
         if (fNum>2047) {
@@ -499,7 +499,7 @@ void DivPlatformGenesis::tick(bool sysTick) {
             off=(double)s->centerRate/8363.0;
           }
         }
-        chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,4,chan[i].pitch2,1,1);
+        chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,2,chan[i].pitch2,1,1);
         dacRate=chan[i].freq*off;
         if (dacRate<1) dacRate=1;
         if (dumpWrites) addWrite(0xffff0001,dacRate);
diff --git a/src/engine/platform/genesisext.cpp b/src/engine/platform/genesisext.cpp
index f0c35ecc..d9f2b7a8 100644
--- a/src/engine/platform/genesisext.cpp
+++ b/src/engine/platform/genesisext.cpp
@@ -461,9 +461,9 @@ void DivPlatformGenesisExt::tick(bool sysTick) {
   if (extMode) for (int i=0; i<4; i++) {
     if (opChan[i].freqChanged) {
       if (parent->song.linearPitch==2) {
-        opChan[i].freq=parent->calcFreq(opChan[i].baseFreq,opChan[i].pitch,false,4,opChan[i].pitch2,chipClock,CHIP_FREQBASE,11);
+        opChan[i].freq=parent->calcFreq(opChan[i].baseFreq,opChan[i].pitch,false,2,opChan[i].pitch2,chipClock,CHIP_FREQBASE,11);
       } else {
-        int fNum=parent->calcFreq(opChan[i].baseFreq&0x7ff,opChan[i].pitch,false,4,opChan[i].pitch2);
+        int fNum=parent->calcFreq(opChan[i].baseFreq&0x7ff,opChan[i].pitch,false,2,opChan[i].pitch2);
         int block=(opChan[i].baseFreq&0xf800)>>11;
         if (fNum<0) fNum=0;
         if (fNum>2047) {
diff --git a/src/engine/platform/n163.cpp b/src/engine/platform/n163.cpp
index 691cdc04..2e7c82a4 100644
--- a/src/engine/platform/n163.cpp
+++ b/src/engine/platform/n163.cpp
@@ -358,7 +358,7 @@ void DivPlatformN163::tick(bool sysTick) {
     }
     if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
       // TODO: what is this mess?
-      chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,0,chan[i].pitch2,chipClock,CHIP_FREQBASE);
+      chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE);
       chan[i].freq=(((chan[i].freq*chan[i].waveLen)*(chanMax+1))/16);
       if (chan[i].freq<0) chan[i].freq=0;
       if (chan[i].freq>0x3ffff) chan[i].freq=0x3ffff;
diff --git a/src/engine/platform/zxbeeper.cpp b/src/engine/platform/zxbeeper.cpp
index 676db382..fad63ae8 100644
--- a/src/engine/platform/zxbeeper.cpp
+++ b/src/engine/platform/zxbeeper.cpp
@@ -115,7 +115,7 @@ void DivPlatformZXBeeper::tick(bool sysTick) {
     }
     if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
       if (chan[i].active) {
-        chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,0,chan[i].pitch2,chipClock,CHIP_FREQBASE);
+        chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE);
         if (chan[i].freq>65535) chan[i].freq=65535;
       }
       if (chan[i].keyOn) {