I totally forgot to say that huh? You'll want to rename them to the following files respectively:
- El Infausto Ladon de Joyas A.ogg
- El Infausto Ladon de Joyas B.ogg
Bonus: since it's an ogg file, you technically can listen to it whenever ya want.
Sorry that you're having troubles... Obviously you tried the "perma-fix" and refresh method, so let me offer a different solution:
Just before entering the zoned area of troubles, spam the enter key until you get to the caves. You'll know what the caves are when ya see em.
Save the game once you're in the caves, and reload the game (closing the game may be a requirement). It fixes it on a "temporary" scale until the devs get it fixed.