Additively mix a signal from specified synthesizer to a given portion of a sound.
sound = a sound object to write to
channel = channel to fill (beginning from 0)
synth = synthesizer object
freq = synthesizer frequency
startTime = start time of a signal in seconds
duration = duration of a signal in seconds
amplitude = volume coefficient of a signal
Additively mix a signal from specified synthesizer to a given portion of a sound. sound = a sound object to write to channel = channel to fill (beginning from 0) synth = synthesizer object freq = synthesizer frequency startTime = start time of a signal in seconds duration = duration of a signal in seconds amplitude = volume coefficient of a signal