Why do the backing tracks on my computer have a poor quality sound ?

JJazzLab is a Midi-based application, it does not directly produce sounds. Rather it sends Midi messages to a sound device. So the sound quality directly depends on the sound device you choose to connect to JJazzLab.

The main types of sound devices are:

  • External synthesizer or sound module : this is usually a good option to have high quality sounds with an easy setup.
  • Virtual instrument : virtual instruments can produce high quality sounds but need a more complex set up.
  • Others (usually the Windows or soundcard default GM sound bank) : this often leads to poor quality sounds. To improve sound quality you may try to use a device which can load SoundFont files, such as the built-in Java Internal Synth or the VirtualMidiSynth application, with a GM-compatible soundfont such as the Arachno soundfont.

I don’t have administration privileges on my Windows computer, can I install JJazzLab ?

Yes. When first prompted by the JJazzLab installer, select “Install only for me”, then select an installation directory where you have write access (in My Documents for example).

Can I use JJazzLab like a virtual arranger keyboard, i.e. play the chords in real time on my keyboard to control JJazzLab ?

No you can’t, because JJazzLab was not designed for this purpose.

I can open a song from the examples directory, but I can’t save it (access denied error)

The examples directory is located in the JJazzLab installation directory. On systems like Windows 10, modifying the installation directory requires administrator privileges. You should use menu File/Save As and pick a directory where you have write access, like you user home directory.

How do I transpose a song ?

  • Select all the chord symbols (select a chord symbol then ctrl-A, or shift-click to another chord symbol)
  • Use the mouse-wheel, or right-click menu transpose

Is there a discussion forum about JJazzLab ?

Yes: http://jjazzlab.freeforums.net