I think fishtank is referring to a speaking voice rather than a singing voice. In which case, a speech coach could be quite helpful.
You don't think that fishtank already thought of that?
Also, I DID say that Luciano Pavarotti, the world's finest 20th century tenor, DID have a high pitched voice, a natural tenor voice, when he spoke. What is really wrong with that, if it's what nature gave one?