Hi there! I have been fighting against this same problem for hours and finally found a solution.
In my case I needed the 6 tracks inside the main music event to run in sync and loop, but fade in or out depending on a discrete parameter value. Since AHDSR in clips nor tracks was working the way I needed, I created one send channel in the mixer window for each track (6 in total), assigned those tracks (pre-fader) to the sends (-inf volum in the event page), [1]
