I set up four loops in an audio looper program I've been working on for future release by Livid Instruments. I'm using the speed of my hand gestures as detected by the four distance sensors on the audio cube to change the playback speed and direction of the loops, similar to scratching a record.
This video was originally made for an article for createdigitalmusic:
createdigitalmusic.com/2008/05/20/hands-on-audiocubes-as-alternative-controller-for-music-and-visuals/