MIDIFART is a pocket midi controller designed for Arduino Promini that supports five analog potentiometer, 10 buttons, 1 bank button, some modules and midi output capability via 3.5mm TRS cable for sending data out to hardware synthesizer or midi device, and some modules like ultrasonic sensor and LCD display. For programing code can be done with arduinoIDE. The PCB board also support Arduino Promicro as midi device for software controller but sadly you don't have full features like some optional module but it is more than enough for backing up your task.

I used this controller for my synthesizer and music software, because today controller out there too big and lack some features like battery powered capability although there are some may still required wireless connection or just usb port as main connection and power source, but old hardware still used wired connection as comunication between the devices. So this project i made just solved my problems and who's interest in my project can build it too. Just visit my Github repository for detail information about pograming code, case and required components. And check demo video.