At about 3:13 you can hear a low pitched buzzing type of sound, but I'm not quite sure how it's produced exactly. I've watched countless guitar cover videos, but no one seems to be playing it right. People usually are bending the note, but not applying any vibrato, which there seems to be quite a bit of. Even then, it's a very synthetic tone, not exactly just a guitar with some distortion applied on top. The attack and release is also interesting, almost as if there is a heavy gate applied. Any ideas?