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Thanks again Dwedit. I added you to the credits under special thanks since you've helped me so much. So am I pretty much screwed with the Metroid sounds? Is there any way to get them from the nes version?

Edit: My copy of Metroid FDS was the same as yours.

Metroid with Sound Effects
Finally did it.
Metroid has a strange way of numbering the tracks.

There are 6 bytes, which have a 1 or 0 bit set for each possible song/sound effect. So there are up to 48 sounds. So your songs are numbered like "bank 00, offset 80, bit 01" or "bank 03, offset 85, bit 04".

Some tracks only play if a particular bank is loaded. Other tracks work regardless of which bank is loaded.

Always available: Sound effects, Samus Appearing, Collect Item, Mysterious/Secret Area, Boss Music
Only available if correct bank is loaded: Title, Credits, Brinstar, Mother Brain battle, Escape, Norfair, Kraid, Ridley

Awesome! Thanks. It does seem to be missing three sound effects I need:

Bomb Explode, Long Beam, and Ice Beam.

I can just use prerecorded sounds for those if you can't get them in the NSF.

Actually maybe track 15 is supposed to be the bomb explode. But I think it's also missing the sound for when you shoot a boss.

when viewed in an NSF player, bomb is #15, and ice beam is #19. (I updated the file at some point, you may need to redownload)

Shooting a boss is track #36, but it sounds ugly in an NSF player.

19 is wave beam actually. It's cool. I'll just use sound files for the sounds it doesn't have.

Greetings, I am trying to get the sound effects tracks off the Akumajou Densetsu NSF, but am having some issues. The NSF started with 28 tracks, so I first I changed byte 006 to FF. At this point, I can hear the sound effects in the extra tracks, but track 17 also plays for every track past 28.

This is what appears to be the track replacement code:
0A:E0F1:AA TAX
0A:E0F2:BD 00 E1 LDA $E100,X @ $E100 = #$51

When I set this code to EA EA EA EA, it simply plays track 17 for all 255 tracks. Any ideas? Thanks!