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This video shows a clever modification to the Thingamagoop: a lightproof cardboard enclosure with a cardboard strip to control the amount of light reaching the photocell. You control the synthesizer’s pitch by moving the cardboard strip. Maker Pete Ashton posits:

In theory a pianola-style score could be written on a long strip. That would involve working out the pitch differences between various sized holes. But it could work.

In the Maker Shed:

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Thingamagoop 2

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