M1 v4.2.1 MIDI 1.0 Detailed Specification 96-1-4
MIDI, the Musical Instrument Digital Interface, was established as a hardware and software specification which would make it possible to exchange information (musical notes, program changes, expression control, etc.) between different musical instruments or other devices such as sequencers, computers, lighting controllers, mixers, etc. This ability to transmit and receive data was originally conceived for live performances, although subsequent developments have had enormous impact in recording studios, audio and video production, and composition environments.
The latest revision of the basic MIDI 1.0 specification which defines the core layout of MIDI 1.0 messages and the classic MIDI 1.0 tranport of 5 pin DIN connectors.