In singing and speaking, the larynx should be steadied, but not held rigidly fixed in any one position. It will be remembered that to this part of the vocal mechanism are attached, below, the trachea, and above, the tongue, indirectly through the hyoid bone and the thyro-hyoid membrane, as well as certain muscles which influence the relative position of these various parts, so that to maintain the larynx in the same position, absolutely, must be against Nature's methods. The tongue alone must in its movements tend to alter the position of the larynx, as we have before pointed out. At the same time, the laxness and lack of control which some singers permit in their vocal organs, under the mistaken idea that all the parts of the "throat" cannot be too free, prevents them from getting the effects they desire, with that vigor and certainty the public so much admires, and rightly so. The golden mean should be observed; between undue tension, which implies inability to control, whether it be in the larynx or the breathing apparatus, and a looseness inconsistent with neat and certain results, the voice-producer must choose, with that common sense so indispensable to success in all undertakings, but which will never be adequately encouraged till students look more frequently for the reasons of the procedures recommended to them, and teachers strive to gain influence with their pupils by showing them that what they recommend lies beyond their own minds—that it, in fact, has its foundation in the laws of Nature.
Of the tongue, soft palate, and lips, which are the principal modifiers of the shape of the mouth cavity, the tongue has by far the most influence. When the tongue lies flat in the mouth, it may be considered to be in its primary position, and it is important that in singing and speaking the student learn to begin his voice-production with this organ in that position, or a slight modification of it, for it is only when it is thus placed that a tone at once round, full, and pure can be produced.
In order to secure this result, the vocalist or speaker must begin by taking breath through the mouth, as we have already insisted, and at once, before there is time for any stiffening of parts, commence to intonate—i.e., as soon as enough air has been inhaled for the purpose intended. The correct position is facilitated when one taking breath through the mouth acts as if about to yawn. If this act be well imitated, the student will find, on looking into a hand-glass, that the tongue is more or less furrowed behind in the middle—in other words, it forms a sort of trough; and the deeper the trough the student learns to form at will, the better, for there are times in actual singing and speaking when this must be as deep as possible. It is clear that in this way the central convexity above, formed by the hard palate, forms with the corresponding concavity in the tongue a sort of trumpet-shaped organ admirably adapted for the production of the desired tone.
The tongue is important in the highest degree not only in the formation of vowels, as will be shown more fully in the next chapter, but also in shaping consonants.
It is sometimes important to move the tongue from one position to another with great rapidity. Such a composition as Figaro's song (cavatina) in Rossini's "Barber of Seville" could not be properly sung by any one not possessing great control over the tongue. Indeed, this composition may be considered a perfect test of the extent to which the singer is a master of mouth gymnastics; and this is only one of many such works. In like manner, many passages in Shakespeare and others of the best writers in all languages can only be spoken with effect by those with a mastery over the tongue, lips, soft palate, etc., but above all, the tongue.
Important as are the lips, many persons tend to use them too much, and the tongue too little, in speaking and singing. They attempt to make up for a mouth almost closed in front by the teeth, by excessive movements of the lips.
Special tongue and lip practice should be carried out before a mirror. The lips should be kept rather close to the gums, and moved away as little as possible (i.e., the lips), as to do so serves no good purpose, and is unpleasant to the eye of the observer. Teeth and lips must be regarded, so far as musical sounds are concerned, as danger regions—rocks on the shore, against which the singer or speaker may shipwreck his tones. His object should be to use them adequately to form vowels and consonants—in other words, in the formation, not the spoiling, of words, as is so often the case.
We cannot too much insist on both speaker and singer attending to forming a connection between his ear and his mouth cavity. He is to hear, that he may produce good tones, and the tones cannot be correctly formed if they be not well observed. To listen to one's self carefully and constantly is a most valuable but little practised art. The student should listen as an inexorable critic, accepting only the best from himself.
This leads to the consideration of the question of the open mouth. The expression "open mouth" means, no doubt, to most people, the open lips rather than the open mouth cavity—i.e., open in front, the teeth well separated. In voice-production, by "open mouth" both open cavity and open lips must be understood.
There is a special tendency in many, perhaps in most persons, to close the mouth cavity unduly in singing a descending scale. This is often accompanied by a bad use of the breath, and a general relaxation of the vocal apparatus, which is possibly more frequent in sopranos and tenors, whose chief effects are often produced by their high tones. But to-day, more than ever, when refined intellectual and emotional effects are demanded, is it important that the lower tones, so effective in producing emotional states, should not be neglected by any singer of whatever voice; while for speakers high tones are really comparatively little used.