For a student producer, those “errors” are invaluable. They reveal the human process of listening and decoding. When you compare a user’s MIDI version of “Billie Jean” to the original, you see exactly what they misheard—and that teaches you more about active listening than any YouTube tutorial.
That’s not a bug. It’s the feature.
Chiptune and tracker musicians especially revere the archive. Because MIDI contains no audio, it’s trivial to convert to 8-bit sound modules, Game Boy trackers, or Sega Genesis VSTs. Nonstop2K is effectively the largest chiptune lead sheet repository on the web. nonstop2k midi file archive