In case you don’t quite know or remember, the hidden music was only available with the ‘G(alien head)meboy’ code using the secret letters in the name selection.
Here’s the link.
http://www.mediafire.com/?mwifg4nwwjj
There is some very minor ‘static’ sounds in the tracks, nothing distracting. I didn’t know how to fix that. Probably because it was directly converted from USF format, I dunno.
Anyway, enjoy!
Oh, I should also point out that the file info is completely blank on the tracks(Soundtrack name, contributing artist, etc). However, each track is named accordingly and numbered in their titles.
http://www.vgmusic.com/music/console/nintendo/n64/index-classic.html