// Converts a treble note offset to a midi offset
func noteTMidi(note float64, quaverCount float64) s.Sound {
// NOTE: Only [-8, 8] allowed for 'note'.
bFloat, sharp := math.Modf(note)
base := int(bFloat)
if sharp < 0 {
sharp += 1.0
base--
}
// 0 = B = offset 8
midi := trebleMidi[base+8] + trebleKeys[base+8]
if sharp > 0.1 {
midi++
}
midiToSound := s.NewTimedSound(util.MidiToSound(midi), quaverCount*q)
return s.NewADSREnvelope(midiToSound, 15, 50, 0.5, 20)
}
func SampleAdsrEnvelope() s.Sound {
// Includes: TimedSound and SineWave
return s.NewADSREnvelope(
s.NewTimedSound(s.NewSineWave(880.0), 875),
50, 200, 0.5, 100)
}