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C64: fix dSID multi-chip

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tildearrow 2023-07-11 17:21:51 -05:00
parent 6bbb407863
commit e8130caa52
4 changed files with 32 additions and 8 deletions
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18
src/engine/platform/c64.cpp
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@ -613,6 +613,24 @@ void DivPlatformC64::setFlags(const DivConfig& flags) {
keyPriority=flags.getBool("keyPriority",true);
testAD=((flags.getInt("testAttack",0)&15)<<4)|(flags.getInt("testDecay",0)&15);
testSR=((flags.getInt("testSustain",0)&15)<<4)|(flags.getInt("testRelease",0)&15);
// init fake filter table
// taken from dSID
double cutRatio=-2.0*3.14*(sidIs6581?(((double)oscBuf[0]->rate/44100.0)*(20000.0/256.0)):(12500.0/256.0))/(double)oscBuf[0]->rate;
for (int i=0; i<2048; i++) {
double c=(double)i/8.0+0.2;
if (sidIs6581) {
if (c<24) {
c=2.0*sin(771.78/(double)oscBuf[0]->rate);
} else {
c=(44100.0/(double)oscBuf[0]->rate)-1.263*(44100.0/(double)oscBuf[0]->rate)*exp(c*cutRatio);
}
} else {
c=1-exp(c*cutRatio);
}
fakeCutTable[i]=c;
}
}
int DivPlatformC64::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {