I claim to know How to Develop the Voice, because the 1st eight videos I demonstrate how. It's my contention the demo's are so well depicted that a singer could learn how to do them on his own. In fact, a singer who can't do what I demo, and as easily as I do, would have to ask himself, why not? I say there is no better way to develop the voice. Whether or not that's true is unimportant. What is important is a point of view, yours, that you couldn't have if I didn't say it as clearly as I did.