Along a similar line of thought, someone’s probably already dumped all the audio somewhere on the net…

I don’t know that much about how audio worked on N64, but for SNES I remember that there was a separate program, basically, for the music that could be extracted and run independently from the game (usually stored as SPC files, once extracted, if my memory from ~20 years ago serves). N64 might have something similar?

I’d seriously go dig into what’s already been reverse-engineered because people have completely dissected the game at this point.