Using FluidSynth

The JJazzLab built-in synth.

JJazzLab bundles a ready-to-use Fluidsynth instance optimally configured for rendering backing tracks.

FluidSynth should be enabled by default when you first launch JJazzLab. You can check this in the Midi Out tab of the Options/Preferences, as shown in the image below.

On Linux and MacOS, it requires that FluidSynth was previously installed on the system.

If FluidSynth appears disabled, it means that a problem occured while trying to load FluidSynth. Check the installation instructions.

Use the Default instruments button to define the FluidSynth instruments to be used by default when a new rhythm is used in a song.

FluidSynth settings

Some FluidSynth settings can be adjusted via the dialog below.

• gain: change it only if adjusting the computer sound volume is not enough

• audio latency: change it if, when a song is playing, user interface changes are not in-sync with the sound

• effects: apply predefined settings

• audio driver: changing the audio driver is not recommended. However, on Linux, in some cases, it might help to solve an audio configuration issue.

FluidSynth open-source project

More info at https://www.fluidsynth.org.