envelope follow
Envelope follower is a Max 4 Live device. It takes an incoming signal, which can then be remapped onto another parameter. A nice way to use it, is to have two chains - one with NO effects, just a clean chain and the other should be the Envelope Follower grouped with a compressor (in front of it) and use the sidechain function to route the signal to a parameter on the same track. The Envelope follower group can be muted, so we just hear the result of the now automated "clean" chain.