Refer back to the previous chapter to find out more about vowels generally, and about the phenomenon of resonance..
During singing, we need to remain fully mobile both in terms of pitch as well as sonically (moving from sound to sound,) We also need to be mobile dyamically and texturally which is the domain of the Press (thread)
Vowels are produced when the raw sound from the vocal cords is altered by the resonance of the cavities of the vocal tract.
The upper cavity is not adjustable so the vowels are distinguished by the actions performed in the pharynx and the mouth. In order to be able to move smoothly from one vowel to another we need to to learn to create all the sounds necessary from a single central location. Speaking vowels are, in most people, produced individually, usually each by a different method. Singing vowels are produced in a continuous joined-up stream, all by a very similar method. A bit like the difference between block-letters and cursive script.
It all starts with the shape of the pharyngeal cavity, and as a developing singer you will be working on how to position or set up the throat so that all the vowels will be produced evenly and smoothly.
A brief word about consonants is in order at this point: we need to make sure that consonants never interfere with the flow of vowels! More about this elsewhere.