Building an Arduino MIDI Controller - Leandro Linares
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
JY MCU USB Bluetooth compatible wireless serial port transparent transmission module original HC06 host with housing 2.0|Parts & Accessories| - AliExpress
Overview | Adafruit Feather M4 CAN Express | Adafruit Learning System
Overview | Adafruit Proximity Trinkey | Adafruit Learning System
Building an Arduino MIDI Controller - Leandro Linares
Make Your Own Cheap USB MIDI Controller or Keyboard : 4 Steps - Instructables
USB Host - MIDI device software
Building an Arduino MIDI Controller - Leandro Linares
Building an Arduino MIDI Controller - Leandro Linares
The Perils Of Cheap MIDI Adapters | Hackaday
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
Second iteration: USBmidi2 / Raspberry Pi Controller