Soundmachines - an instrument for performing electronic music
"Three units, which are resembling standard record players, translate concentric visual patterns into control signals for further processing in any music software. The rotation of the discs, each holding three tracks, can be synced to a sequencer.
The Soundmachines premiered on the Volkswagen New Beetle stand at the IAA motor show in late Summer 2011. In cooperation with the sounddesigner/ producer Yannick Labbé of TRICKSKI fame, we developed three unique discs, each controlling one track of an Ableton Live Set exclusively made for the Event. The show was supported by a set of realtime generated visuals, running on a 25m wide LED wall."
Vimeo demonstration
see also: http://www.creativeapplications.net/sound/soundmachines-objects-sound/