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JJazzLab 2.0.1 (March 8, 2020)

JJazzLab screen capture

New features

  • Better sounds thanks to the new high-quality JJazzLab SoundFont
  • Ready-to-use presets for VirtualMIDISynth (Windows) or FluidSynth (Linux)
  • Better rendering of Yamaha styles (full SFF1 & SFF2 format support)
  • 300 embedded rhythms, plus access to thousands of Yamaha style files
  • Better organization of song and rhythm files
  • Automatic notification of JJazzLab software updates
  • Various improvements and bug fixes

Consult the release notes for more details.


Windows 32-bit version: JJazzLab-2.0-Win32-Setup.exe

Windows 64-bit version: JJazzLab-2.0-Win64-Setup.exe

Linux x64: JJazzLab-2.0-Linux.zip

Mac OSX: JJazzLab-2.0-Mac.zip

Recommended downloads to get the best out of JJazzLab 2 on Windows:

JJazzLab SoundFont: JJazzLab-SoundFont.sf2 (from Musical Artefacts web site)

VirtualMidiSynth soundfont player: VirtualMIDISynth (from CoolSoft web site)

Windows Installation instructions

Download and run the setup program. Choose “Install for me only” if you don’t have administration rights on your computer. If you get a security alert this page explains what to do.

NOTE: Visit the VirtualMIDISynth help page for instructions how to use JJazzLab with VirtualMIDISynth and the JJazzLab SoundFont.

Linux Installation instructions

Unzip the package. Start JJazzLab using bin/jjazzlab in the installation directory.

NOTE: JJazzLab 2 works best on Linux with FluidSynth and the JJazzLab SoundFont. Visit the FluidSynth help page for more instructions.

Mac OSX Installation instructions

Unzip the package and open it to start JJazzLab. If you get a security alert : using the Finder, select the JJazzLab package, ctrl-click menu, Open, this will give you the choice to open the application in spite of the security alert.

NOTE: On Mac OSX the JJazzLab SoundFont can be loaded in the Java Internal Synth. Visit the Java Internal Synth help page for more info. The Java Internal Synth may have performance issues when playing too many notes in parallel.

Free software !

You can use JJazzLab for free as long as you agree to the terms of the End User License Agreement. JJazzLab contains open source components (see below) governed by specific licenses which are available (with source code) via the JJazzLab-X project.


Let us be grateful to the people and projects that are or were a part of JJazzLab, or those who had contributed to it in some way.

  • JJazzLab-X: The infrastructure of JJazzLab is available as an open-source framework.
  • Apache Netbeans: For the powerful IDE and modular application framework.
  • XStream: for the XML serialization
  • JFugue: for the Midi file parsing
  • Peter Wierzba, Michael P. Bedesem, Jørgen Sørensen/jososoft: for the precious information about the Yamaha style file format
  • Incava: for the diff algorithm
  • InnoSetup: for the installer
  • John Nebauer: for the SGM-v2.01-NicePianosGuitarsBass SoundFont which served as a basis for the JJazzLab SoundFont.
  • FluidSynth: for the SoundFont synth on Linux
  • CoolSoft: for VirtualMIDISynth on Windows
  • My family: for the too many evenings and week-ends spent on this project