Build an Arduino powered MIDI Controller - Arduino Project Hub
Building a Basic Midi Controller Part 1 - Easy 3 Pot (Potentiometer) Arduino Uno Effects Midi Controller (Serial-USB)... Quick,easy and Cheap! : 7 Steps (with Pictures) - Instructables
DIY USB Midi Controller With Arduino: a Beginner's Guide : 10 Steps (with Pictures) - Instructables
Make Your Own MIDI Controller With An Arduino | Hackaday
10 Amazing DIY MIDI Controllers Made with Arduino | All3DP
Building an Arduino MIDI Controller - Leandro Linares
Arduino (Teensy) USB MIDI foot controller for Katana amps
Building a Basic Midi Controller Part 1 - Easy 3 Pot (Potentiometer) Arduino Uno Effects Midi Controller (Serial-USB)... Quick,easy and Cheap! : 7 Steps (with Pictures) - Instructables
Arduino UNO As A MIDI Keyboard - Programming Questions - Arduino Forum