Clear Vowels

Even though we speak of singing being sustained speech on pitch and that anyone can sing if they can speak, something has to be said about clear vowels. We all know that vowels distinguish words, tense problems, but the vowel is also the source of a second pitch, vowel pitch. Clear voices have the ability of aligning the vocal pitch and its overtones, with the vowel pitch and its overtones. Alignment is a good word. The right size and shape, formats, etc.