Just thought i'd mention here, that using a novation launchpad, running the software "midi katapult" works really well with audiomulch. I especially enjoy using it to control mulch's matrix mixers. 8x8 grid controller... with an 8x8 mixer matrix? Heaven! Midi katapult is on sale right now for only 12 bucks, and you can even get a used launchpad for under $100... quite nice.
I forgot to mention, it's also very nice for using with the live looper. I set a row of buttons to individually mute/unmute the different loops, and then set up columns of buttons underneath them to control the volumes. really nice.