The sweet sound of technology.
From Wired:
"The Audiopad is projected on a special table equipped with radio sensors that track the position and movement of half a dozen plastic discs, or "pucks."
Most of the pucks control a series of preprogrammed tracks -- the rhythm, the bass line, the melody and so on.
There's a large circular puck that changes the volume of each track when moved closer or further away, allowing different tracks to be emphasized at different times.
Another puck -- a star-shaped "action" puck -- allows the musician to alter the basic preprogrammed tracks in various ways. If the action puck is moved toward one of the track pucks, a choice of different actions is projected next to the target puck. The actions "spring up" on the table top, and each is selected by moving the action puck over it.
The controls are projected onto the table by a video projector mounted on the ceiling or on the table itself using a mirror. A PC running Linux controls the whole thing."
