A Thingamagoop mod. Lightproofed in cardboard a strip of paper with a slit of varying width is passed across the only hole. The wider the slit, the higher the pitch.
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.
Mod created at a Fizzpop hack sesh: fizzpop.org.uk/
Thingamagoop from bleeplabs.com/
More about pianolas pianola.org/
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