Final Fantasy Hacktics

Is it possible to swap random battle music to other battle music? You know when end game it's only random battle theme and Deep Dungeon theme you will listen. It gets boring eventually. Is it possible to set some Random battle music to some of the story ones like Lucavi theme, Antipyretic, remnants, etc?

There are only four music track IDs available for random battles. An ASM hack could theoretically change them to any other four tracks in the game you might want to use.

In-game music swaps to more than the four tracks? Not without something like the Preparation Menu featured in Call of Power and ReMixed.

So, the music is tied to the events of the game, right? We just can't set some music to specific random battles because it is "Random Battle" event.

... no? The game has a tiny four byte data table with four track IDs. When a random battle is run, the code that sets up stuff like the chosen ENTD and weather also runs an RNG check and gets a result of 0-3, then chooses the matching ID slot to be the track for the random battle.

The random battle EVENT does very little, and has nothing to do with the music. In theory, if you wanted, you could set all of the random music tracks to 0x00 (again, via ASM hacking), apply the Event Instruction Upgrade Hack (through ASM), and then modify the random battle event to run a Random event command to pick which one of however many music tracks you wanted to have playing, using the custom PlayTrack command.