bus index to write to. For an audio-rate UGen, this is an audio-bus, for a control-rate UGen, this is a control-bus. Note that the bus index can only be modulated at control-rate.
signal to write to the bus. If the UGen is audio-rate, the input must also be audio-rate.
bus index to write to.
signal to write to the bus.
Abstract method which must be implemented by creating the actual