diff --git a/src/engine/platform/snes.cpp b/src/engine/platform/snes.cpp
index c0769a506..dab75bf7f 100644
--- a/src/engine/platform/snes.cpp
+++ b/src/engine/platform/snes.cpp
@@ -167,6 +167,7 @@ void DivPlatformSNES::tick(bool sysTick) {
     if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
       DivSample* s=parent->getSample(chan[i].sample);
       double off=(s->centerRate>=1)?((double)s->centerRate/8363.0):1.0;
+      if (chan[i].useWave) off=(double)chan[i].wtLen/32.0;
       chan[i].freq=(unsigned int)(off*parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE));
       if (chan[i].freq>16383) chan[i].freq=16383;
       if (chan[i].keyOn) {