it's a breathing tech plus using your stomach muscles to exhale the air the right way into your vocal chords ... now there are 2 ways to do it ,
Fake voice , and real voice ... fake voice where you end up making it sound like a full on scream but using the notes in your chords where you don't really scream with full blown air if you know what i mean .....
Full voice when you are actually screaming your lungs out in a way to get the notes you want ,,,
when you use a combenation of both you can acheave so much ..... but most of true vocals use real voice , wich is hard , but you gotta practice alot ...
i'm doing a black metal project "aside from my band and the other project in wich i'm only playing guitar and writing the songs" but in this one i'm singing and playing .... now to do this i had to develop the style in wich i wanted to use , it's a combention between many styles , but mainly black vocals ..
my chords are ok with lower full voice , but higher notes i had to combine at the best of times and use a fake voice at the worst of them , why ??? cause i'm still crap lol .... but it's not that bad lol , well not when you are on a mic .lol
look at chucky "death" , his vocals were actually full voice , and you couldn't tell with his expression cause he's so used to it , it's amazing ....
while look at Dani Filth , his expression actually changes alot ... same goes for emperror and other bands ......
don't know if this is of any help at all ... but yeah ... remember to never compress the notes , if you have to scream loud to get the note , always grap a deep breath and learn to controle it using your stomach muscles ... ask a singing teacher , or someone you know close who's doing it for more details if you still need more answers ... but yeah as far as i know this is one of the ways lol ...
close to doing power metal "happy vocals lol" , where hitting open high notes needs a good open voice not fake cause it's way to exposed lol ...
cheers
