Acoustic /modular Guitar Synth

The era of mutable acoustic instruments continues.

A research at MIT created a guitar with a replacable sound board. He sets up a few piezos
on the sound board. Those piezos are send to a dsp card. As you change the sound board, you get a new tone. Sone sound boards include 150 year old wood form a Vermont bridge, and a container based sound board. The container board can be filled with liquids.

http://blog.makezine.com/archive/2009/03/chameleon_guitar_takes_on_many_tone.html