This is pretty darn impressive, it changes the way the guitar sounds like by manipulating the vibration of the guitar all without amplification. It seems a little over-the-top though, impressive from a technical perspective in how it alters the sound in realtime but this device would probably be more expensive than altering the sound downstream.<p>There is a lot more innovation in the guitar space than people actually think. A company called Line 6 has been pushing the boundaries of amplifiers and guitars for a few years now, albeit digitally but on the same level. They have a line of Variax guitars that allow you to digitally down-tune your guitar by turning a knob and ability to program them via a software application.<p>Really impressive device nonetheless, I never thought such a thing would be possible without amplification on an acoustic guitar.