Comment 15 for bug 1000759

I think refactoring the microphone ducking feature to use the effects system would not make the implementation any cleaner. IMO it would overcomplicate that because we'd need to implement a new special EffectUnit. I think it would make more sense to have a class that can be used both for the special microphone ducking feature and for the effect. In the effect, the sidechain input to the common class would be hardcoded to be the same as the input signal to the effect.