2. Chameleon Guitar
The Chameleon guitar is primarily an academic project, the brain-child of MIT student Amit Zoren who wanted to build an instrument capable of creating a complete range of different sounds, but combining digital and acoustic technologies.
Specifically, a computer inside the body of the guitar reads the acoustic information that resonates from the wooden 'heart' (each heart is subtly different, like the body of a regular acoustic guitar), then uses that information to create different sounds and effects. The heart can actually be made of different materials, it will always be a slightly unique in shape, size and density, and the result is a myriad of different sounds, giving the Chmaleon guitar almost infinite sound possibilities.
Link: Chameleon Guitar