http://www.spencerkiser.com/spincycle/

What
spinCycle is a turntable that allows you to arrange and play colors visually and musically.

How
spinCycle is fitted with a camera that takes the place of tonearm on a normal turntable. Rather than a needle playing grooves in a record, spinCycle creates sounds based on colors that the camera sees. The DJ places brightly colored plexiglass circles on the spinning platter, creating beautiful color patterns that are then translated into sounds. The DJ can rearrange the discs at any time, thereby creating a new soundtrack on the fly.
spinCycle also captures the colors the camera sees and can either project them on a wall or display them on a computer monitor. This hypnotic display changes as the music changes, providing a fun synchronized multimedia experience.
Max/MSP/Jitter is used to do the color-tracking and sound reproduction. Future versions will use a color sensor rather than a web camera, and sound will be emitted from the built-in speaker using tones generated by a microcontroller. For more information, download the NIME paper.

View video [.mov]

Via: Neural.it