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Wow, this is excellent! Why only the Arduino Mega though?

I built an "air" MIDI controller with a regular Arduino Uno and cheap HC-SR04 sensors. This is me playing it: https://www.youtube.com/watch?v=tgH-WU-9CZA (Sorry for the silly wig).

Flashing UsbMidiKlik to have a compliant MIDI device is kind of a pain (but not horrible).

I may try to experiment with this and a Teensy... Thanks!!

(Author here). Because the firmware size is about 70k right now for AVR, and ATmega32u4 has only 32k of flash. Black Pill STM32F4 boards are supported though, and soon 3 more STM32 boards.

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