I have to confess that I haven't looked into this very much since my last post, but I'm looking at the flevel.lgp file "nmkin_1" right now with Meteor. This is the file with the background for an area of Reactor 1 in Midgar near the beginning of the game. Barret first joins the party here.
Well, I've found a few interesting things with this file. The background music should be MAKORO and the battle music should be BAT. In hex, that's 06 and 07 respectively (right?). Meteor seems to think differently, though.
I've investigated the "Entities & Script" section of this file quite carefully. Under "dir", I've found the following:
BMUSCÂ Â (00)
I've also found this several lines later:
MUSICÂ Â (01)
BMUSCÂ Â (02)
Now, I'm under the assumption that MUSIC = the music that is played in the area while BMUSC = the music played during a battle (if I'm wrong about this, I'll be surprised!).
Based on the information I have and what I understand, the only thing that adds up correctly here is the second BMUSC, since the battle music for when you're trying to escape from the reactor is indeed "OB", which should be 02. Apart from that, it seems to make little sense.
So far, I can only assume that either I've missed something here or Meteor isn't very reliable for music and that I'll have to go back to blind hex-editing.
EDIT: I've looked at the file with a hex-editor and there is a 08 after the final AKAO (there are three of them). Since 08 is FIDDLE, I don't think this has to do with the background music. I have found a 07 after the second AKAO, but that's BAT, the battle music, not the field music.
I haven't done any testing yet, but so far, not much makes sense. I'm sure you can edit the music with Meteor somehow, but I don't know how. There has got to be a hex-editing omniscient out there who has the answers...
I'm not in a huge hurry to do any music editing for now, though. I have a lot of other stuff on my mind at the moment. I will probably be preoccupied with other things until February