There’s not much you can say against the laser harp. At the Highline Ballroom on Tuesday night a beam of green light shot up from the floor, then fanned out into eight individual rays. The tiny ...

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[Robi] and [Kathy] from elecfreaks have put together a how-to article about a Laser Piano they just built. Instead of keys, the user breaks beams of laser light to trigger the sounds. Several laser ...