At the Sounding Edge: Using QSynth and QJackCtl (Linux Journal)
Dave Phillips looks at
two GUIs for fluidsynth and JACK in this Linux Journal article.
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QSynth and QJackCtl are GUI front-ends for other software. QSynth provides a friendly user interface for the fluidsynth soundfont-based synthesizer. QJackCtl supplies a similar interface for the JACK audio server/transport control system. Both applications use a recent version of the Qt graphics toolkit and up-to-date versions of their other required components."