Death Metal 101: How To Growl

Since the early 80's, countless rockers have heard unmistakable growls and screams in metal, and wondered 'How do they do that?'

Out of curiosity, I've tried from time to time. I'm sure you have too. Normally, it only ends in a very humbling bout of coughing.

Those who can do, those who can't are mere mortals.