MIDI Playback to Sound Card Using A Sound Font

Install Qsynth.
Use Sound Font Downloaded in website: http://zenvoid.org/audio.html
In Rosegarden, Settings->MIDI. Check Load sound blaster at start-up. Choose Sound Font.
In Jack->Connect, ALSA Midi to Qsynth input.

Or, in LMMS, Settings->Paths: Default sound font file.
Import MIDI File, then Export to WAV, or OGG.