I've tried replacing the bat file in the Anxious Heart DLPB selection, repacked it and it won't play and when I enter a battle there is a red error message at the bottom of the screen saying something along the lines of "error, unable to open file bat" or something.
The bat file is a .ogg file and It was an Mp3 before and I converted it using Audacity - the only thing I changed before exporting it was the bitrate to 192000
The other soundtracks like the world map and fan fare works (but I didn't change these)