MMA (Musical MIDI Accompaniment) is an accompaniment generator. It creates MIDI tracks for a soloist to perform over from a user-supplied file containing chords and MMA directives. It is very versatile and generates excellent tracks. It comes with an extensive user-extendable library with a variety of patterns for various popular rhythms, an extensive user manual, and several demo songs. It is a command line driven program. It creates MIDI files which need a sequencer or MIDI file play program.