void AddPSG(M4AVoice voice, byte low = 0, byte high = 127)
{
dynamic v = voice;
int sample;
if (voice is M4APSG_Square_1 || voice is M4APSG_Square_2)
{
sample = AddSample(SongPlayer.Sounds[SongPlayer.SQUARE12_ID - v.Pattern], "Square Wave " + v.Pattern);
}
else if (voice is M4APSG_Wave wave)
{
sample = AddSample(SongPlayer.Sounds[wave.Address], string.Format("PSG Wave 0x{0:X}", wave.Address));
}
else
{
sample = AddSample(SongPlayer.Sounds[SongPlayer.NOISE0_ID - v.Pattern], "Noise " + v.Pattern);
}
sf2.AddINSTBag();
// ADSR
if (v.A != 0)
{
// Compute attack time - the sound engine is called 60 times per second
// and adds "attack" to envelope every time the engine is called
double att_time = v.A / 5.0;
double att = 1200 * Math.Log(att_time, 2);
sf2.AddINSTGenerator(SF2Generator.attackVolEnv, new GenAmountType((ushort)att));
}
if (v.S != 15)
{
double sus;
// Compute attenuation in cB if sustain is non-zero
if (v.S != 0)
{
sus = 100 * Math.Log(15d / v.S);
}
// Special case where attenuation is infinite -> use max value
else
{
sus = 1000;
}
sf2.AddINSTGenerator(SF2Generator.sustainVolEnv, new GenAmountType((ushort)sus));
double dec_time = v.D / 5d;
double dec = 1200 * Math.Log(dec_time + 1, 2);
sf2.AddINSTGenerator(SF2Generator.decayVolEnv, new GenAmountType((ushort)dec));
}
if (v.R != 0)
{
double rel_time = v.R / 5d;
double rel = 1200 * Math.Log(rel_time, 2);
sf2.AddINSTGenerator(SF2Generator.releaseVolEnv, new GenAmountType((ushort)rel));
}
high = Math.Min((byte)127, high);
if (!(low == 0 && high == 127))
{
sf2.AddINSTGenerator(SF2Generator.keyRange, new GenAmountType(low, high));
}
if (voice is M4APSG_Noise noise && noise.Panpot != 0)
{
sf2.AddINSTGenerator(SF2Generator.pan, new GenAmountType((ushort)((noise.Panpot - 0xC0) * (500d / 0x80))));
}
sf2.AddINSTGenerator(SF2Generator.sampleModes, new GenAmountType(1));
sf2.AddINSTGenerator(SF2Generator.sampleID, new GenAmountType((ushort)(sample)));
}