MIDI is the most popular audio format in the world. Standard MIDI files store information related to pitch, modulation, velocity, panning, and other sound parameters and support up to 16 audio channels. MIDI files are supported by various types of programs and devices, such as keyboard or synthesizers.

MIDI format was developed in 1983 and updated twice in 1990s by Roland company. MIDI files don’t contain actual audio data, only information and instruction needed by given instrument to play the music.