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"The theremin is just one of those instruments that nerds can't stop digging and modding. This newest iteration, the Squaremin, resembles the much-loved instrument in that you don't touch it to play it -- rather you move your hands about to control the octave and output of notes. The Squaremin was made using an ATmega168 chip, and boasts two infrared sensors to measure proximity -- one to control the note played, the other to control the octave which is played out of the front speaker of the instrument. Check out the video after the break.[Via Make]"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2009/04/20/video-theremin-esque-digital-synth-sure-to-get-brian-wilson-up/>