Also: MP3 version

Though originally composed in 1983, this MIDI is based on the 1993 version from Super Mario All-Stars, both originally composed and arranged by Kōji Kondō. This song single-handedly immortalized Kōji Kondō in video game music. Nobuo Uematsu has since even suggested that this song become the new national anthem of modern Japan.

And no, the instruments aren't dissonant from each other. These are the notes used in the Super Mario All-Stars version. The ensemble of notes have a nontraditional consonance to them, and only seem dissonant when heard for the first time. But it grew up on me, and I really prefer this arrangement over the 1983 arrangement. I hope it's grown on you just as much.

This arrangement has more than 15 unique non-percussion voices, and General MIDI's limit is 15. So I had to swap instruments in and out of some channels, particularly the melody. For a decent MIDI device, this isn't an issue. (This also isn't an issue at all in the MP3 version.) But Quicktime MIDI tends not to swap instrument patches fast enough in real time, so if you listen to this MIDI with Quicktime's browser plugin, you may hear some melody notes occasionally playing as the wrong instrument.