Peff demonstrates his live performance rig, based on Propellerhead Reason 5 and a Livid Ohm64 MIDI controller:
Video overview of using the OHM64 with Reason 5 to create a live pa setup to switch loop slots and crossfade between sources and effects. It’s not really music composition, but more like Loop Jockeying.
Controls are mapped via standard remote override mapping, however this setup requires a bit of remote codec hacking to alter the behavior of the function keys and top 4 rows of buttons.
A detailed explanation is posted on Peff’s site: