This is not a “song” in the popular sense of the word.
This file only sends MIDI System Exclusive messages to reset all sound settings, volume settings, etc. for MIDI synthesizers that support GM, XG, and GS formats. It does not make any sound when you listen to it. Please try playing this file if you feel that the sounds coming from your synthesizer sound strange after playing the MIDI files on this site.
You can embed this file at the beginning of any MIDI file you create.