http://tcrf.net/Super_Mario_Bros.
This page is unfinished: no mention is given among the "Unused Music" as to the following:
Alternate Water Music 1 (no harmony)
Alternate Water Music 2 (no harmony version plays first; then the regular version with harmony)
Alternate Ground Music (with a portion of the first movement preceding the lead-in notes)
Ground Music Loop 1 (first movement only, loops)
Ground Music Loop 2 (first movement only, loops, different bass track)
Ground/Star Music (plays lead-in notes of Ground Music, then the Star/Cloud Level music)
Alternate Underground Music 1 (different bass track)
Alternate Underground Music 2 (more white noise percussion)
Alternate Underground Music 3 (plays version with white noise; then plays normal version)
Alternate Underground Music 4 (different bass track and white noise)
Alternate Castle Music 1 (more white noise percussion)
Alternate Castle Music 2 (plays version with white noise; then plays normal version)
Code:
MusicSelectData:
.db WaterMusic, GroundMusic, UndergroundMusic, CastleMusic
.db CloudMusic, PipeIntroMusic
~Ben