Some questions

I made an .asm file with that code and patched it with Snestuff. It gave an error

error: patch.asm: line8: label [sbrA] not found [JSR sbrA]

I also made an .asm with the other code you provided (where the battle theme is saved but not played - thus no fanfare). It patched succesfully, but the battle screen won't load. I get no image, only sound.

In any case, the hex edit you provided - namely the "FF at C2/BF3B" - is already a boon and solves most of my problems.