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No, not a cbg... At the Metalab, a hacker space in Vienna, we tinker around a MIDI Organ. This vid shows the first tryout of a 16 tones-module, another 16 tones will follow.
Solenoids: hand wound, 2200 turns, ~0.5A at 12V, a nail with permanent magnets on the top and bottom, rubber valve cut from a broken bike tire, the green LEDs are fueled by the inductive kickback :)
Pipes: PVC tubes 20mm diameter, lowest note: B (plugged)
Wind chest: plastic food storage box
Wind supply: still an issue, at the moment a 12V air pump
Electronics: MIDI signal to Arduino to Shift Registers to MOSFETs to solenoids
Arduino source code: https://bitbucket.org/wizard23/arduinomidiconroller/
Built at Metalab, Vienna http://metalab.at