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YM2612: early full linear pitch experiment

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This commit is contained in:
tildearrow 2022-05-10 16:22:40 -05:00
parent c79e5e8081
commit aad5d818f2
3 changed files with 44 additions and 34 deletions
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5
src/engine/platform/genesis.cpp
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@ -471,7 +471,7 @@ void DivPlatformGenesis::tick(bool sysTick) {
for (int i=0; i<6; i++) {
if (i==2 && extMode) continue;
if (chan[i].freqChanged) {
int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,false,4,chan[i].pitch2);
int fNum=parent->calcFreq(chan[i].baseFreq&0x7ff,chan[i].pitch,false,4,chan[i].pitch2,chipClock,CHIP_FREQBASE,11);
int block=(chan[i].baseFreq&0xf800)>>11;
if (fNum<0) fNum=0;
if (fNum>2047) {
@ -495,7 +495,8 @@ 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;
// TODO: linear
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,false,4,1,1)+chan[i].pitch2;
dacRate=chan[i].freq*off;
if (dacRate<1) dacRate=1;
if (dumpWrites) addWrite(0xffff0001,dacRate);