JJazzLab 5.1
Fed up with boring backing tracks that never match your needs?
Create your own dynamic backing tracks in just a few minutes!
100% free | open source | Windows/Linux/MacOS
Latest news - Jan. 2026
JJazzLab 5.1 stable version is out! Master jazz standards with the new signature jjSwing style.
Grows with your skills
Whether you’re a beginner, an advanced musician, or a teacher, JJazzLab adapts to your needs —from practicing a simple blues to teaching a complex tune.
Musically alive
Add variety, rhythmic accents and natural dynamics that keep your practice sessions inspiring
Hundreds of styles
Master jazz standards with the signature jjSwing style -or explore any genre using compatible Yamaha style files for endless possibilities
Simple yet powerful user interface
Type in a few chord symbols, choose a style and hit play -no complex setup, no music degree required!
Open platform for musicians and developers
Explore the JJazzLab open-source code to add new features and music generation plugins.
30,000+ JJazzLab users world wide
What they say
Why jjazzlab ?
As a jazz/funk pianist, I’ve tried most auto-accompaniment and backing track apps (Band-in-a-Box, iReal Pro, etc.). They’re good, and I had fun at first, but I quickly got frustrated: they lacked the variety and dynamics that make practice sessions truly inspiring. I knew a program could never fully match a real band, but I had ideas for doing better. That’s why I created JJazzLab.