Audiopad is a musical composition and performance device that tracks the positions of objects on a flat surface, then converts their motion into music. Developed by MIT PhD students James Patten and Ben Recht, the system is is powered by Debian Linux. It consists of a set of electronically tagged objects on a tabletop, a matrix of antennae that track the objects, and an LCD projector which displays an animated UI. Link to QuickTime demo movie, Discuss (via LinuxDevices.com)