fhare
DemondimSpawn
Theory encompasses melody, harmony, time, notation, etc. Obviosly, someone in Opeth knows a good deal about most of this stuff, whether they know it or not. Even if they don't know what it's called, that wouldn't matter until they try to explain it to others outside their creative team, and even then it's probably only a minor inconvienence. The end result is the only thing that matters, right? We all know Opeth kill on that front.