[starkparker]

Tangentially related, the hobby market for converting MIDI to USB HID via hardware, which is popular for using electronic drum kits' and keyboards' MIDI output in rhythm and music games. Most of these are driven by the Pi Pico, like https://rolllimitless.com/ and https://santroller.tangentmc.net/wiring_guides/midi.html

Newer open-source rhythm games like YARG also handle MIDI-over-USB directly: https://docs.yarg.in/en/Instruments