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Andy Cavatora and friends built these gravity harps for a Björk concert currently playing in the U.K. It looks like each pendulum has a servo-controlled rotation system that changes what note gets plunked at the pendulum’s nadir.

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal nerdage.net


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