a few things i found help, as i have been singing and playing guitar in a black/viking metal band for about two years. Jack Daniels really gets the vocal chords warmed up first of all. i start off before practice and shows with a little octave warmup. Its basically what opera singers do, only in death black growl style. startgin at low volume and low pitch then increasing volume while keeping the pitch is the first thing i do. Its hard to keep a good deep growl at a loud volume if you havent noticed. After youve got the one octave pretty well stable with good volume, go up to the next octave. basically in about 10 minutes i go from chris barnes to dani filth. there are some breathing/meditation exercises i use for breath capacity to. Sit in a position so that your back is vertically straight and head is straight out. breathe in deep 4 times slowly and hold for 5 seconds, then blow the air out of your nose. youll develop your own routine after awhile if you actually get into developing your vocals. just few little tidbits.
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