Amazon.com: LEKATO USB Type-C MIDI Interface MIDI Cable Adapter with Input & Output Connecting with Keyboard/Synthesizer for Editing & Recording Professional MIDI Adapter Cord with Windows/Mac for Studio -6.5Ft : Musical Instruments
Building an Arduino MIDI Controller - Leandro Linares
JY MCU USB Bluetooth compatible wireless serial port transparent transmission module original HC06 host with housing 2.0|Parts & Accessories| - AliExpress
usb device - USB Full Speed driver with MCU in DIP package - Electrical Engineering Stack Exchange
DIY USB Midi Controller With Arduino: a Beginner's Guide : 10 Steps (with Pictures) - Instructables