MMA - Musical MIDI Accompaniment

 MMA - Musical MIDI Accompaniment

 

Winmma  - packaged for windows with python

https://sourceforge.net/projects/winmma/files/ 

1.1 works, the others doesn't

LeMMA

https://welltemperedstudio.wordpress.com/code/lemma/

http://xenon.stanford.edu/%7Egeksiong/code/lemma/LeMMA0.9a.zip  - works.

latest for python 3 doesn't work

JJazzlab - free backing tracks/ chords

https://www.jjazzlab.com/en/

MuseScore

https://musescore.com/