Regulators

I need some sort of input device for playing chords. On a real wood pipe they look like this:

regulators photo

I'm thinking I can 3D print some keys and have them anchor against microswitches. Might need a spring in there too. The whole device can hopefully show up on the I2C bus, so you can not plug them in if you don't want them.

Of course, there's no reason to limit this to just a few chords played on 3 voices...

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