One particular track is giving me nightmares, and I tried changing it, but it appears that it's not in ...\PillarsOfEternity_Data\data\audio\mus\mus_final\ directory. I found it there, replaced it with custom .ogg file, but the old one still plays during combat.

 

It's no big deal, I'd normally just disable it all and run my own music in the background, but I quite like the rest of them, and all this one is making me do, is making me enter menu every other combat.

Eh, never mind. I restarted the game and it works, old one was just stored ether in temp folder or in memory.