I couldn't sleep, so I figured out how to make NES tunes which use the Konami VRC7 memory controller's FM synth peripheral
Here is a demo tune: NSF Extended or NSF or Ogg Vorbis. The NSFE plays fine under foo_gep.dll in foobar2000 and I don't know what else. You basically need NSFE and VRC7 support in your player.
It's pretty gross. Pay special attention to the horrible DPCM samples of me saying "go", "what", and "it", because this is the best known kind of percussion. I also did this because someone asked me to.
Here's sonic3end1.mml, in case anyone who is interested in this type crap wants to pick it apart. The samples are all up in that directory, too; same filenames as are cited in the MML file.
I'm probably going to do the rest of the song tomorrow
I should probably sleep at all