You must check out these performance videos by The Draftmasters, Victor Adan and Jeff Snyder, who take 80's-style pen-plotter printers and hack the firmware to allow live mechanical control. Daniel Iglesia analyzes their video to create graphics for 3D glasses in real time.
They control them with a physical interface that turns their gestures into vector commands. Electromagnetic pickups mounted on the printers turn their electrical fields into the sound. Video input (from camera's trained on the printers) gets analyzed on the fly to create live graphics for 3D glasses.
They've performed around NYC, being called "a band of renegade tech geeks...like Robocop on the fritz" by Time Out NY.
Check them out at the following links: