The TENORI-ON

Media artist Toshio Iwai and Yamaha have collaborated to design a new digital musical instrument for the 21st century, TENORI-ON. A 16x16 matrix of LED switches allows everyone to play music intuitively, creating a "visible music" interface. TENORI-ON layers can be thought of as “performance parts” or “recording tracks.” The TENORI-ON has a total of 16 layers. Separate notes and voices can be assigned to each layer, and all layers can be played together in synchronization.

Here is another nice track.