Uses Kinect to control which beat is playing in a looping sample. A sample is chopped up into eighth note slices (or any increment) and arranged like a clock face around you. The currently playing slice is controlled by your left hand's position in space. This allows you to remix a loop by waving your hand around. The red dot indicates your hand's position, the green bar indicates the currently playing slice, and the blue bar moves at the tempo of the song to serve as a guide.

Official Site: http://wiki.musichackday.org/index.php?title=Kinect_BeatWheel