MMA means "Musical MIDI Accompaniment". It is a program for musicians who needs some accompaniment while practicing a song. This program is a realistic alternative to the famous "Band In A Box" from PG Music.

There are two important things that make MMA different:

* MMA is free software: you don't pay any money for using and, very important, you can study, adapt or modify the program. The license for MMA is GPL (General Public License).
* MMA is a program without Graphical User Interface (GUI). It runs from the command line and the song data (chords, styles, etc.) are written in a simple plain text file. The format for this files (.mma files from now) is documented and explained in the documentation provided by the MMA's author, Bob van der Poel.

MMA is programed with the Python programming language and requires a python interpreter or runtime.