Found this video on a friends blog :: Bloodyloud ::  thx’s mr. travel for sharing.

LUM is a new music interface invented by Alfredo Duarte that translates the position in space (xyz) of luminous spheres in to sound. Each axis is given a parameter, X = pitch, Y = loudness & Z = effects, although these may change. The “controllers” incorporate 2 different colored LEDs each one activated by different buttons, allowing the user to handle 2 instruments simultaneously.