I was unable to find much documentation on designing MT32 instruments, and had to resort to deciphering the MUNT source code to find how instruments work.
http://www.youngmonkey.ca/nose/audio_tech/syn … oland-MT32.html documents the binary parameter format, but not how they control the sound.

I documented my research at https://hackmd.io/s/ry0vF_C2V , which also has some suggestions on refactoring the MUNT source code.

Is there a central location for this kind of MT32 documentation? Independent/MUNT Wiki? Independent source repo, or MUNT git:/doc folder?

Any suggestions for designing MT32 instruments today? I'm thinking of improving JSynthLib to make it not a pain to use.