There is an awesome easy way to automate the volume in Ableton that I found in a producer interview with Evoke. Use the Auto-Pan effect and set the phase to 0. Boom done, I have the default setting on my auto-pan set to 0 phase, full sine, about 75% on the amount and its on rate setting, at 1/6 notes. You can even use it for distortion if you put it at full square wave with some ridiculous time of 1/64 notes but low on the amount that its affecting it.