CHAPTER V
THE ERROR OF THE THEORY OF MECHANICAL VOCAL MANAGEMENT
A fundamental difference was pointed out, at the close of the preceding chapter, between the old Italian method and modern systems of vocal instruction. This is worthy of repetition. The old Italian method was founded on the faculty of imitation. Modern methods have as their basis the idea of conscious, direct, mechanical control of the vocal organs. All the materials of instruction based on this idea of mechanical control were seen to be absolutely valueless. It is now in order to examine still further the structure of modern Voice Culture, and to test this basic idea of mechanical control.
As a muscular operation, the actions of singing must be subject to the same physiological and psychological laws which govern all other voluntary muscular actions. What are these laws? How do we guide and control our muscular movements? At first sight, this seems a simple question. We know what we want to do, and we do it. But the important point is, how are we able to do the things we want to do? You wish to raise your hand, for example, therefore you raise it. How does your hand know that you wish to raise it? Does the hand raise itself? Not at all; it is raised by the contraction of certain muscles in the arm, shoulder, and back. That is, when you wish to raise your hand, certain muscles contract themselves. But these muscles are not part of the hand. What leads these muscles in the shoulder and back to contract, when you will to raise your hand? Normally you are not even aware of their contraction. Yet in some way these muscles know that they are called on to contract, in response to the wish to raise the hand. This takes place, even though you know nothing whatever of the muscles in question. The process is by no means so simple, when looked at in this light.
A complicated psychological process is involved in the simplest voluntary movements. This is seen in the following analysis:
"To move any part of the body voluntarily requires the following particulars: (1) The possession of an educated reflex-motor mechanism, under the control of the higher cerebral centers which are most immediately connected with the phenomena of consciousness; (2) certain _motifs_ in the form of conscious feelings that have a tone of pleasure or pain, and so impel the mind to secure such bodily conditions as will continue or increase the one, and discontinue or diminish the other; (3) ideas of motions and positions of the bodily members, which previous experience has taught us answer more or less perfectly to the _motifs_ of conscious feeling; (4) a conscious fiat of will, settling the question, as it were, which of these ideas shall be realized in the motions achieved and positions attained by these members; (5) a central nervous mechanism, which serves as the organ of relation between this act of will and the discharge of the requisite motor impulses along their nerve-tracts to the groups of muscles peripherally situated." (_Elements of Physiological Psychology_, Geo. T. Ladd, New York, 1889.)
Let us again consider the action of raising the hand, and see how the psychological analysis applies in this movement. We note in the first place that we are concerned only with the third, fourth, and fifth particulars of Prof. Ladd's analysis. These are:
The idea of the movement.
The fiat of will which directs that this movement be performed.
The discharge of the requisite motor impulses, along the nerve-tracts, to the muscles whose contraction constitutes the movement.
It will be simpler, and will answer the purpose equally well, to combine the third and fourth elements, and to consider as one element the idea of the movement and the fiat of will to execute the movement.
_The Idea of a Movement_
The mental picture of a purposed movement is simple and direct. No reference is involved to the muscles concerned in the performance of the movement. When you will to raise your hand, the action is pictured to your mind as the raising of the hand, and nothing more. Certain muscles are to be contracted. But the mental picture of the movement does not indicate what these muscles are, in what order they are to be brought into play, nor the relative degrees of strength to be exerted by each muscular fiber. You do not consciously direct the muscles in their contractions.
_The Discharge to the Muscles of the Nerve Impulse_
How then are the muscles informed that their contraction is called for? They have no independent volition; each muscular fiber obeys the impulse transmitted to it by the nerve, from the nerve center governing its action. These nerve centers are in their turn controlled by the central nervous mechanism. And in complex voluntary movements the central nervous mechanism is under the control of the higher cerebral centers. The wish to raise the hand appears to the mind as an idea of the hand being raised. This idea is translated by the central nervous mechanism into a set of motor nerve impulses. Does consciousness or volition come into play here? Not at all. On this point Prof. Ladd remarks: "As to the definite nature of the physical basis which underlies the connection of ideas of motion and the starting outward of the right motor impulses, our ignorance is almost complete."
Is it necessary for the performance of a complex muscular action that the individual know what muscles are involved and how and when to contract them? No; this knowledge is not only unnecessary, it is even impossible. Prof. Ladd says of this: "It would be a great mistake to regard the mind as having before it the cerebral machinery, all nicely laid out, together with the acquired art of selecting and touching the right nervous elements in order to produce the desired motion, as a skilful player of the piano handles his keyboard."
How then are the muscles informed of the service required of them? Or more precisely, how does the central nervous mechanism know what distribution of nerve impulses to make among the different nerve centers governing the muscles? As Prof. Ladd says, our ignorance on this point is almost complete. There resides in the central nervous mechanism governing the muscles something which for lack of a better name may be called an instinct. When a purposeful movement of any part of the body is willed, the mental picture of the movement is translated by the central nervous mechanism into a succession of nerve impulses; these impulses are transmitted through the lower centers to the muscles. The instinct informing the central nervous mechanism how to apportion the discharges of nerve impulse among the various muscular centers is to a high degree mysterious. The present purpose will not be served by carrying the analysis of this instinct further.[7]
[Note 7: The evolutionary development of this instinct is not altogether mysterious. Science can fairly well trace the successive steps in the development of the central nervous mechanism, from the amoeba to the highest type of vertebrate. "Nerve channels" are worn by the repeated transmission of impulses over the same tracts. Coördinations become in successive generations more complex and more perfect. As consciousness develops further, in each succeeding type, actions originally reflex tend to take on a more consciously purposeful character. But all we are concerned with now is the problem of tone-production. Our purpose is best served by accepting the faculty of muscular adaptation as an instinct, pure and simple.]
There is therefore no direct conscious guidance of the muscles, in any movement, simple or complex. So far as the command of voluntary muscular actions is concerned, the first simple statement of the process sums up all that for practical purposes need be determined;--we know what we want to do, and we do it. The mind forms the idea of an action and the muscles instinctively respond.
But the fact remains that the muscles need to be guided in some way. We do not perform instinctively many complex actions,--writing, dancing, rowing, swimming, etc. All these actions, and indeed most of the activities of daily life, must be consciously learned by practice and repeated effort. How are these efforts guided? To arrive at an answer to this question let us consider how a schoolboy practises his writing lesson.
The boy begins by having before him a copy of the letters he is to write. Under the guidance of the eye the hand traces these letters. At each instant the eye points out to the hand the direction in which to move. As the hand occasionally wanders from the prescribed direction the eye immediately notes the deviation and bids the hand to correct it. The hand responds to the demands of the eye, immediately, without thought on the boy's part of nerve impulse or of muscular contraction. By repeated efforts the boy improves upon his first clumsy attempts; with each repetition he approaches nearer to the model.
In the course of this progress the muscular sense gradually comes to the assistance of the eye as a sort of supplementary guidance. But at no time is the eye relieved of the responsibility of guiding the hand in writing. To sum this up, the movements of the hand in writing are guided, so far as the consciousness is aware, directly by the sense of sight.
We have here the law of voluntary muscular guidance. In all voluntary movements the muscles are guided in their contractions, through some instinctive process, by the sense or senses which observe the movements themselves, and more especially, the results of the movements. In most actions the two senses concerned are sight and muscular sense. The more an action becomes habitual the more it tends to be performed under the guidance of muscular sense, and to be free from the necessity of the guidance of the eye. But muscular sense does not usually rise so high into consciousness as sight, in the guidance of muscular activities. Many oft-repeated movements, especially those of walking, become thoroughly habitual and even automatic; that is, the muscular contractions are performed as purely reflex actions, without conscious guidance of any kind. But even in walking, the necessity may at any instant arise for conscious guidance. In such a case the sense of sight immediately comes into service; from reflex the movements become voluntary, and consciously guided. In the case of most complex actions the sense of sight furnishes the most important guidance.
If the muscular operations of singing are subject to the general laws of psychological control, the guidance of the vocal organs must be furnished by the sense which observes the results of the movements involved. This is the sense of hearing. Just as in writing the hand is guided by the eye, so in singing the voice is guided by the ear. There can be no other means of guiding the voice. Muscular sense may under certain conditions supplement the sense of hearing, but under no circumstances can muscular sense assume full command. The net result of the application of psychological principles to the problem of tone-production is simply this, that the voice is guided directly by the ear.
It is thus seen that the idea of mechanical vocal management is utterly erroneous. On pushing the analysis still further the fallacy of this idea is found to be even more glaring.
Is a knowledge of anatomy of any assistance in the acquirement of skill in performing complex muscular actions? Not in the least. An understanding of muscular processes does not contribute in any way to skilful execution. The anatomist does not play billiards or row a boat one whit the better for all his knowledge of the muscular structure of the body.
Even if the precise workings of the vocal mechanism could be determined, the science of Voice Culture would not benefit thereby. Knowing how the muscles should act does not help us to make them act properly. It is utterly idle to tell the vocal student that as the pitch of the voice rises the arytenoid cartilages rotate, bringing their forward surfaces together, and so shortening the effective length of the vocal cords. Whatever the vocal cords are required to do is performed through an instinctive obedience to the demands of the mental ear.
And finally, a precise analysis of muscular contractions is impossible, even in the case of comparatively simple actions. When, for example, the hand describes a circle in the air, a number of muscles are involved. True, it is known what these muscles are, and what effect the combined contractions of any group would have on the position of the hand. The direction of the hand's motion at any instant is determined by the resultant of all the forces exerted on this member. But as this direction constantly changes, so must the relative degrees of strength exerted by the muscles also constantly change. At no two successive instants are the muscular adjustments the same. This simple action, performed without thought or knowledge of the muscular processes, presents features too complex to be analyzed on the basis of mechanical law and anatomic structure.
A complete analysis of the muscular operations of tone-production is absolutely impossible. The adjustments of the laryngeal muscles involve probably the most minute variations in degree of contraction performed in the whole voluntary muscular system. What we do know of the mechanical operations of the voice is exceedingly interesting, and a further knowledge of the subject is greatly to be desired. But we can never hope to clear up all the mystery of the vocal action.
This statement must not be construed to mean that the study of the vocal mechanism has been devoid of valuable results. On the contrary, the present understanding of the mechanical operations of the voice will be found of very great value in erecting a true science of Voice Culture. The only weakness of the present results of vocal investigation is due to the fact that this investigation has always been carried on under the influence of the idea of mechanical vocal management. This influence has led all theoretical students of the subject to attempt to apply their knowledge in formulating rules for direct mechanical guidance of the voice. That these rules are valueless is due solely to the fundamental error involved in the mechanical idea.
Voice Culture must be turned from the idea of mechanical vocal management. The old Italian masters were right in that they relied, even though empirically, on the imitative faculty. Modern teachers may do better, for in the light of present knowledge reliance on the faculty of vocal imitation can be shown to be in strict accord with sound scientific principles.