[LAU] band organs

linux-audio-user: I'm a Linux user would like to play (sequence) band organ MIDI files using soundfont synthesis. I have set up a Core Duo laptop with Debian Wheezy, recompiled the kernel with the realtime patch, and installed various music software packages (RoseGarden, FluidSynth, etc.). STFW I am able to find free/ open source software (FOSS) MIDI files of band organ music rolls, but I am unable to find any FOSS band organ soundfont files. I am also unable to find technical information on band organs, notably music roll encoding/ decoding -- e.g. which organ functions and instruments/ pitches are on which music roll channels -- and how this is dealt with when the rolls are converted to MIDI and played using something other than the make and model band organ intended by the arranger. Any suggestions? TIA, David