FluidSynth requires a soundfont to synthesize a midi. On Linux distributions some soundfonts are often preinstalled, though their quality varies. If your midi sounds very poor, try using another soundfont.
Details
GeneralUser-GS by S. Christian Collins
is a nice free soundfont. You can use soundfont_download()
to install a copy
of this soundbank for use by this package.
See also
Other fluidsynth:
fluidsynth_settings
,
midi_play()