public static void Start(this ModulationEnvelope envelope, RegionPair region, int key, int velocity)
{
// According to the implementation of TinySoundFont, the attack time should be adjusted by the velocity.
var delay = region.DelayModulationEnvelope;
var attack = region.AttackModulationEnvelope * ((145 - velocity) / 144F);
var hold = region.HoldModulationEnvelope * SoundFontMath.KeyNumberToMultiplyingFactor(region.KeyNumberToModulationEnvelopeHold, key);
var decay = region.DecayModulationEnvelope * SoundFontMath.KeyNumberToMultiplyingFactor(region.KeyNumberToModulationEnvelopeDecay, key);
var sustain = 1F - region.SustainModulationEnvelope / 100F;
var release = region.ReleaseModulationEnvelope;
envelope.Start(delay, attack, hold, decay, sustain, release);
}
internal Voice(Synthesizer synthesizer)
{
this.synthesizer = synthesizer;
volEnv = new VolumeEnvelope(synthesizer);
modEnv = new ModulationEnvelope(synthesizer);
vibLfo = new Lfo(synthesizer);
modLfo = new Lfo(synthesizer);
oscillator = new Oscillator(synthesizer);
filter = new BiQuadFilter(synthesizer);
block = new float[synthesizer.BlockSize];
}
public static void Start(this ModulationEnvelope envelope, InstrumentRegion region, int key, int velocity)
{
Start(envelope, new RegionPair(PresetRegion.Default, region), key, velocity);
}
