JJazzLab 5.0.1
Fed up with boring backing tracks?
"Love it, works as expected, bow, thanks to the author", "Absolutely fantastic app!" (YouTube comments)
Latest news - Nov. 2025
JJazzLab 5.0.1 is out! Includes jjSwing, the ultimate style for practicing jazz standards
Dynamic backing tracks
Start a solo slowly and gradually build up the atmosphere !
Rhythmic accents
Use chord anticipations and rhythmic accents to spice up the arrangement.
Benefit from 100's of free Yamaha style files
JJazzLab can read most of Yamaha style files.
A simple and powerful user interface
Type in a few chord symbols, pick up a rhythm, and press start, it’s a matter of seconds. Need more ? Introduce style or intensity variations, custom bass phrases, etc.
An open platform for developers
Leverage the JJazzLab open-source code to add features and new music generation capabilities via plugins.
Why jjazzlab ?
As a jazz/funk pianist I have tried most of the auto-accompaniment or backing tracks apps (Band In a Box, etc). They are good indeed and I had some fun at first, but I quickly got frustrated: I missed the intensity dynamics which help develop interesting solos. I was aware that a program will never match a real band, but I had a few ideas how to do better. That’s why I decided to start developing JJazzLab.