You didn't read what I said. I already tested it with the MT32GM patch driver. I have that patch utility since I got my LAPC-I in the late 90s.
No, my MT32GM is unrelated to the original Roland midi file. The game works just fine with it (at least in the beginning as that was as far as I tried). Sergm posted link to the thread just above. Not sure if it's the latest version as I haven't touched it for a year or so.
Yet if it comes to emulating GM with MT-32, sadly it will never be complete. One may achieve more or less adequate results with two physical units only (or two munt cores, or a combination, heh).
My driver works decently (minus bugs) as it does a bit more than usual mt to gm remappers:
- replaces all instruments and not only a few that fit into user slots like in the original Roland "solution".
- plays channels 1-16
- swaps stereo
- adds panning to percussion
- it works only for AIL/MSS/SOS and cannot be used as a general driver. Needs to upload instruments at the beginning of a sequence so simple midi streaming is not possible (mt-32 is too slow for on-the-fly uploading without errors, it would work fine in MUNT but not on the real hardware).
- the instruments are okish but I'm not a musician so some are really bad. Example: Anyone heard any decent tubular bells on MT-32? I have yet to hear one that doesn't sound like crap... I decided to not use CM32's extra samples so some fx are bad too.
- rare gm sequences with heavy channel usage will sound pretty bad with many drops.