MIDI - M-usical I-nstrument D-igital I-nterface
Describes a way for one electronic instrument to control another, as long
as they both speak MIDI.
In other words, you can send all the key presses and settings to another instrument, and it will play the music, or you can record the information into a file, and play it with computer software.
HTH,
God Bless,
Eggs