MIDI

MIDI (Musical Instrument Digital Interface) is a standard communications protocol for connecting musical instruments, computers, and related audio devices for playing, editing, and recording music.

In the xenharmonic space, it is used for transmitting scores as .mid files, and for driving synthesizers from keyboards/instruments or scores. It has a variety of extensions and versions that allow for varying amounts of xenharmonicity:

• MIDI Tuning Standard (MTS)
• MIDI Polyphonic Expression (MPE)
• MIDI 2.0