z4twenny wrote on Apr 18th, 2008 11:40pmi've heard kiddos as young as 12 or 13 in bands doing this kind of stuff. i think the most important part is to have very good voice control and be able to do this without hurting yourself. that being said you're going to get more depth and a fuller sound the older you are. you might want to practice it but until you hit somewhere between 18 - 20 (or older) it might not sound quite right. your voice is always changing because of how you treat your voice box (it changes your entire life) hope this answered you question.
quote