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JJazz generates musical MIDI accompaniment based on a chord leadsheet ("Cm7 / F7") and rhythm style information, like e.g. Band-in-a-Box or Jammer. It can be expanded thanks to a plugin system, for unlimited rhythm generation capabilities.

JJazz Web Site


  • Simple and powerful chord leadsheet editor
  • Generate musical accompaniment for any instrument
  • Rhythm "intensity" can vary over time for a more natural feeling
  • Open plugin system for unlimited rhythm generation capabilities
  • Built over the Netbeans Rich Client Platfrom (RCP)

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Additional Project Details


English, French

Intended Audience

Advanced End Users, Developers, End Users/Desktop, Other Audience

User Interface

Java Swing

Programming Language



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