LeMMA is a simple GUI “front-end” written in Python for MMA (Musical MIDI Accompaniment – also written in Python). Just enter the chords, select the grooves and press “Play”. “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. MMA is very versatile and generates excellent tracks. It comes with an extensive user-extendable library with a variety of patterns for various popular rhythms, detailed user manuals, and several demo songs. There are scripts to convert data files from other formats like Band-in-a-box, ABC, MUP and Yamaya .sty (see http://www.mellowood.ca/mma/helpers.html#convert )