This patch uses a Drambo envelope follower and CC generator to control faders in Loopy Pro. CC is mapped to Channel 1, CC 20 by default. Adjust the attack and decay of the envelope follower for a tighter or looser response.

The Drambo preset is a Rack preset. I’m not sure if it’s contained in the Loopy Pro file or if you have to add it separately to your presets. In any case, I’ve included it in the zip file.