The scale proceeds from one semitone to another; each is different; each, as you go on, requires greater height, wherefore the position of the organs cannot remain the same for several different tones. But, as there should never be an abrupt change audible in the way of singing, so should there never be an abrupt change felt in the sensations of the singer's throat. Every tone must be imperceptibly prepared in an elastic channel and must produce an easy feeling in the singer, as well as an agreeable impression upon the listener.
The small peak indicated in the illustration is enormously extensible and can be shifted into infinite varieties of position. However unimportant its raising and lowering may appear, they are nevertheless of great importance for the tone and the singer. The focal point of the breath, that forms simultaneously the attack and the body of the tone, by the operation of the abdominal breath pressure against the chest, is always firmly placed on, beneath, or behind the nose. Without body even the finest pianissimo has no significance. The very highest unmixed head tones are an exception, and they can express nothing. There can be no body expected in them. Their soaring quality of sound endures no pressure, and consequently gives no expression, which is possible only through an admixture of palatal resonance. Their only significance is gained through their pure euphony.
All vowels, too, must keep their point of resonance uninterruptedly on the palate. All beauty in the art of song, in cantilena as well as in all technique, consists chiefly in uninterrupted connection between the tone and the word, in the flexible connection of the soft palate with the hard, in the continually elastic adjustment of the former to the latter. This means simply the elastic form, which the breath must fill in every corner of resonating surface without interruption, as long as the tone lasts.
[Illustration: Red line denotes softest point on the palate.]
If the singer will control his tone,--and in practising he must always do so,--he needs only to test it to see whether he can easily make it softer without perceptible change in the position of the organs, and carry it higher toward the nose and the cavities of the forehead; that is, prepare a form for its continuation upward.