LMMS is a free cross-platform software which allows you to produce music with your computer. This covers creating melodies and beats, synthesizing and mixing sounds and arranging samples. You can have fun with your MIDI keyboard and much more – all in a user-friendly and modern interface. Furthermore LMMS comes with many ready-to-use instrument and effect plugins, presets and samples.
MIDI and soundfonts
Then, you will need to edit the FluidSynth configuration file:
/etc/conf.d/fluidsynth. For the audio driver, choose the sound server that you installed.
When LMMS starts, it will prompt you with the settings. Go to the audio settings, choose the same interface that you set for FluidSynth, and restart LMMS if you made a switch.