This is why I love nerds:
Droidsound has been unofficially spunoff by a fan of the app and it now plays much more varied game files, including usf, dsf, 2sf, and brstm... which means if you want the SSBM/SSBB soundtrack on your Android or if you've looped Sixto & zircon's Subterranean Kamikaze into a brstm like I have, you can listen to it fo'evah.
https://github.com/droidmjt/droidsound
Go to the "prebuilt" folder and download "droidsound-debug.apk"
P.S. Shnabubula's Zelda 2 "Temple" from NES JAMS makes an awesome brstm also. I ain't tellin' you what I heard, I'm tellin' you what I know!