An interesting advertisement commissioned by Japanese telecom giant Docomo, Via Wired
The instrument features row upon row of wooden “keys”, each of which plays a different note. A single wooden ball is released from the top and rolls down the step-like keys, playing Bach’s Cantata 147 as it progresses with hollow, xylophonic plonks. At certain intervals the ball dominos into other balls, which travel down an offshoot of the enormous instrument to play a different sequence of notes which temporarily adds depth to the overall piece.
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