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Usb To Midi Chip Ch345 1 Input And 2 Output Midi Signal Channels No Driver Need 5v And 3.3v Power Supply Voltage Ssop-20, 10pcs - Integrated Circuits - AliExpress
2# MIDI Programming for the Arduino - MIDIUSB Library - YouTube
DIY USB Midi Controller With Arduino: a Beginner's Guide : 10 Steps (with Pictures) - Instructables