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drafting alternative compressor implementation

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This commit is contained in:
5684185+vsariola@users.noreply.github.com
2025-07-11 23:14:23 +03:00
parent 3163f46447
commit b276408900
1 changed files with 8 additions and 8 deletions
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16
vm/go_synth.go
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@ -561,18 +561,18 @@ func (s *GoSynth) Render(buffer sointu.AudioBuffer, maxtime int) (samples int, t
if stereo {
signalLevel += stack[l-2] * stack[l-2]
}
currentLevel := unit.state[0]
targetGain := float32(1)
if threshold2 := params[3] * params[3]; signalLevel > threshold2 {
targetGain = float32(math.Pow(float64(threshold2/signalLevel), float64(params[4]/2)))
}
gain := unit.state[0]
paramIndex := 0 // compressor attacking
if signalLevel < currentLevel {
if targetGain > gain {
paramIndex = 1 // compressor releasing
}
alpha := nonLinearMap(params[paramIndex]) // map attack or release to a smoothing coefficient
currentLevel += (signalLevel - currentLevel) * alpha
unit.state[0] = currentLevel
var gain float32 = 1
if threshold2 := params[3] * params[3]; currentLevel > threshold2 {
gain = float32(math.Pow(float64(threshold2/currentLevel), float64(params[4]/2)))
}
gain += (targetGain - gain) * alpha
unit.state[0] = gain
gain /= params[2] // apply inverse gain
stack = append(stack, gain)
if stereo {