Marek Bereza is an industrial/interaction designer, and came up with a fantastic control system called the Speakatron. It’s a mouth-controlled softsynth!
The Speaktron software uses your webcam to determine if your mouth is open or closed, the shape of your lips and the position of your mouth on the screen. It uses this information to create sounds.
Marek created the strange synth for Music Hack Day London 2010, which took place on September 4th and 5th. It came in first place for Best Music Hack.
Check out the video:
How cool is that? The greatest part about this software, is that you can download it for free from his site, and he also makes the source code available if you want to try and integrate it into other software. Beautiful.