Qsynth is a GUI front-end application for
Fluidsynth. Fluidsynth is a command-line software
synthesizer based on the Soundfont specification.
Qsynth was built with the Qt4 toolkit using Qt
Designer. Eventually it may evolve into a
softsynth management application that allows the
user to control and manage a variety of command
line softsynths, but it currently just wraps the
excellent Fluidsynth program.