Arduino MIDIUSB

Can be used as the "transport layer" for the more advanced Arduino MIDI library

on GitHub

based on PluggableUSB

supports AVR, SAM, SAMD

Building example sketch MIDIUSB_loop.ino for Generic STM32F1 fails

- fixed USB MCU error by enabling, in Tools
  USB support "CDC (generic 'Serial' supersede U(S)ART)" fixed USB MCU error

Unlike ESP32, STM32duino does NOT use TinyUSB

STM32F1 had Arduino MIDI support,
using USB Composite library for Roger's Melbourne's STM32F1 core

@Levi--G's USBLibrarySTM32