JJazzLab 3.2.1

Fed up with boring backing tracks? Try JJazzLab and make your own dynamic backing tracks in just a few minutes!
"Love it, works as expected, bow, thanks to the author", "Absolutely fantastic app!" (YouTube comments)
Latest news - April 11, 2022

Download the new bug-fix release 2.3.1


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 1000's of free Yamaha style files

JJazzLab can read Yamaha style files. It also introduces new extension files for even more style variations.

A simple and powerful user interface

You want to practice your instrument on a few chords ? Type in the chord symbols, pick up a rhythm, and press start, it’s a matter of seconds. You want more variety ? Use the song structure editor to reorder sections or introduce rhythm and intensity variations.


Based on the JJazzLab-X open-source platform

JJazzLab relies on JJazzLab-X, the open-source platform dedicated to backing tracks generation. JJazzLab-X is designed so that third-party developers can easily extend it with new features and new rhythm generation capabilities.

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.