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SoundUnit: fix PCM pitch

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This commit is contained in:
tildearrow 2022-05-02 15:07:59 -05:00
parent a6ef36d42e
commit ce40085d3b
1 changed files with 9 additions and 4 deletions
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11
src/engine/platform/su.cpp
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@ -120,7 +120,12 @@ void DivPlatformSoundUnit::tick(bool sysTick) {
for (int i=0; i<8; i++) { for (int i=0; i<8; i++) {
chan[i].std.next(); chan[i].std.next();
if (chan[i].std.vol.had) { if (chan[i].std.vol.had) {
DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU);
if (ins->type==DIV_INS_AMIGA) {
chan[i].outVol=((chan[i].vol&127)*MIN(64,chan[i].std.vol.val))>>6;
} else {
chan[i].outVol=((chan[i].vol&127)*MIN(127,chan[i].std.vol.val))>>7; chan[i].outVol=((chan[i].vol&127)*MIN(127,chan[i].std.vol.val))>>7;
}
chWrite(i,0x02,chan[i].outVol); chWrite(i,0x02,chan[i].outVol);
} }
if (chan[i].std.arp.had) { if (chan[i].std.arp.had) {
@ -183,11 +188,11 @@ void DivPlatformSoundUnit::tick(bool sysTick) {
DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU); DivInstrument* ins=parent->getIns(chan[i].ins,DIV_INS_SU);
DivSample* sample=parent->getSample(ins->amiga.initSample); DivSample* sample=parent->getSample(ins->amiga.initSample);
if (sample!=NULL) { if (sample!=NULL) {
double off=1.0; double off=0.25;
if (sample->centerRate<1) { if (sample->centerRate<1) {
off=1.0; off=0.25;
} else { } else {
off=(double)sample->centerRate/8363.0; off=(double)sample->centerRate/(8363.0*4.0);
} }
chan[i].freq=(double)chan[i].freq*off; chan[i].freq=(double)chan[i].freq*off;
} }