All MIDI conversions require at the very least a MIDI controller.
Modern electronics provides for many options. From comonplace Arduino and ESP8266 platforms to bespoke PIC microcontroller. We can provide suitable controllers based on any platform although the PIC is preferred due to it's speed of operation.
Full melodeon MIDI system. PCB's designed in house and made in China.
An LCD display added to the Auto-melodeon below.