Wish I could help but being a blues singer, the worse the voice is, the better. My wife, P-Vine, is trained and also teaches music. Different story for her. She just hates me.... Figuratively speakin'...

Bobert

p.s. Jus' funnin'. Even blues singers gotta have their voice work properly... Jus' not as critical as trained classical folks who have greater range to keep in order....