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It looks like magic, but it’s just technology. For a casual weekend hack, developer Adam Somers used a Leap Motion USB motion sensor device to turn his computer into a musical instrument. By adjusting settings in the AirHarp app and waving his fingers around like a wizard casting a hex, Somers was able to recreate the sound of a harp, playing in different keys, melodies and timbres. Watch the video to see and hear what we’re talking about.

Audio photo

Want to know how he did it? You can browse the C++ source of the hack. Try it if you’re computer science-savvy and have a hankering for some folk or classical harp tunes. You can preorder a Leap Motion device here.