i'm not a huge burzum expert although i love their music, its truely nightmarish! the desolation they convey through soundwaves ties my stomach up into a knot and makes my heart want to curl up in a corner. instantly. intense shit!
if you wanna trust my bad ears i think they (he?) _might_ have used that pedal on the 'filosofem' album, and the 'hvis lyset tar oss' one - maybe. their guitar tone has that certain fuzzy buzziness in there for sure, although it sounds altered. better make up your own mind :)
if you want the "pure" hm-2 tone go to early dismember ('like an ever flowing stream') and early entombed ('left hand path'/'clandestine'/'wolverine blues')
oh ok :) didn't quite get that :) hm. or maybe he used ancient aryan stompboxes to sharpen his knives on? btw here's what he used productionwise - in his own words: http://www.burzum.org/eng/library/a_burzum_story06.shtml interesting :D btw i'm mad you didnt tell me about this pedal before, might have concluded my 15+ yrs search a lil sooner!