I know that it's possible (with the aid of a vocal coach) for someone to learn how to sing better (in terms of accurately hitting notes) and possibly to extend their range; however, I'm wondering to what extent it is possible to mould or 'sculpt' your vocal sound?
For example, I've been practicing singing the lead vocal part for Alice in Chains (with a view to possibly starting a tribute band). I can hit most of the notes ok (although the very highest ones are a bit of a stretch); however, my voice is on the softer side and doesn't really have the edgy grit to it that Layne Staley does. I'm not saying I want to sound exactly like him, but is it possible that a vocal coach could help me sculpt my voice to at least sound more 'rocky'?