VOCAL MASTERY
"Vocal Mastery is acquired through correct understanding of what constitutes pure vowel sounds, and such control of the breath as will enable one to convert every atom of breath into singing tone. This establishes correct action of the vocal chords and puts the singer in possession of the various tints of the voice.
"When the diaphragm and respiratory muscles support the breath sufficiently and the vocal chords are permitted to do their work, you produce pure tone. Many singers do not understand these two vital principles. They either sing with too much relaxation of the diaphragm and respiratory muscles, or too much rigidity. Consequently the effort becomes local instead of constitutional, which renders the tone hard and strident and variable to pitch. Again the vocal chords are either forced apart or pinched together, with detriment to tone production.
"The real value of control is lost when we attempt to control the singing instrument and the breath by seeking a place for the tone the singing instrument produces. When the vocal chords are allowed to produce pure vowels, correct action is the result and with proper breath support, Vocal Mastery can be assured."