diff --git a/src/engine/platform/ym2203.cpp b/src/engine/platform/ym2203.cpp
index 95ab537f..3419a1b6 100644
--- a/src/engine/platform/ym2203.cpp
+++ b/src/engine/platform/ym2203.cpp
@@ -449,7 +449,7 @@ void DivPlatformYM2203::tick(bool sysTick) {
       if (parent->song.linearPitch==2) {
         chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
       } else {
-        int fNum=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,4,chan[i].pitch2);
+        int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,4,chan[i].pitch2);
         int block=(chan[i].baseFreq&0xf800)>>11;
         if (fNum<0) fNum=0;
         if (fNum>2047) {