Of importance only second to García’s study of the vocal cord action was Helmholtz’s analysis of the acoustic laws of resonance, especially as they apply to tone and vowel formation. Merkel’sDer Kehlkopf(1873) is the standard work on the operations of the larynx. Dr. Louis Mandl, inDie Gesundheitslehre der Stimme(1876), first announced the principle of breath control. A vast number of other investigators have contributed to the subject and it is safe to say that the vocal action has been studied from every conceivable point of view. It is, however, not necessary here to trace the development of vocal science and to record the work of each student who has made original contributions to the common fund of knowledge.
In our first chapter the generally accepted theories regarding the operations of the vocal mechanism were outlined, and the same plan will be followed in describing the scientific methods of instruction most widely adopted. Modern methods of voice culture have indeed never been standardized. While teachers generally have adopted very nearly the same course, there is a wide diversity of opinion and practice to be found concerning each one of the topics of vocal science. Almost every one of these topics has indeed been the subject of controversy. Yet within recent years the leading authorities have come into fair accord in their application of the various principles. We shall therefore describe the method which has in its favor a consensus of opinion on the part of the best recognized teachers, without offering any statement as to its soundness or adequacy.
First it will be necessary to point out the exact position which the scientific element occupies in the modern system of voice culture. Vocal science has never aimed at a complete revolution of the practices of instruction in singing. Its purpose is rather to divide this instruction into two stages and to take as its province only the first stage. Starting with the well known fact that the voice has only one correct mode of operating, it seeks to impart this correct manner of tone production to the student as a preliminary to the technical training of the voice, strictly speaking. This is the only important point in which the modern system differs from the old Italian method. The initial work of imparting the correct vocal action is commonly called the ‘placing of the voice.’ To accomplish this isthe sole purpose of vocal science, and the scientific method of instruction is designed only to apply to this initial stage. When the correct management of the voice has been acquired through a course of instruction according to scientific principles, the student is held to be ready to undertake the technical and musical education of the singer. This second stage of instruction is conducted almost exactly according to the system of the old masters.
Four elements are included in the scientific system of vocal training. These follow naturally the four distinct operations of singing—breathing, laryngeal action, resonance, and articulation.
Exercises designed to impart the correct manner of breathing are usually given first as toneless gymnastic drills. The student is instructed to fill the lungs in a prescribed fashion (generally that described in Chapter I), and to make sure that the expansion of abdomen and chest takes place exactly according to rule. Practice in the muscular control of the expiration is combined with these preliminary breathing exercises, so soon as they can be performed with fair facility. When the muscular movements of breathing have been mastered as a toneless exercise, the practice is extended to exercises combined with tones, on single notes and scale passages. In these attention is paid to the proper attack and emission of the tone, as well as to the correct management of the breath. A great variety of breathing exercises have been formulated, but as their basic principle is always the same they call for no extended description. Any one of an athletic turn who has himself mastered the correct manner of breathing would have no difficulty in devising exercises suitable for imparting this system to others.
To secure the proper action of the vocal cords and laryngeal muscles the entire throat must be held in a state of supple relaxation before attacking a tone orphrase. In order to start a tone correctly a full inspiration is to be taken, then the vocal cords are to be brought to the degree of tension necessary for the desired pitch at the precise instant the expiration starts. The tone must be attacked squarely on the correct pitch and no breath allowed to escape before it starts. The breath pressure is to be held evenly and correctly managed throughout the entire expiration.
To secure this proper action of the vocal cords the so-called ‘stroke of the glottis’ was advocated by García. The glottic stroke is an explosive sound, formed when the vocal cords are forced apart suddenly by a rather powerful breath pressure. Its most frequent natural occurrence is in the action of coughing, of which it is the most striking auditory characteristic. Although command of the glottic stroke can be acquired without difficulty, it is utterly out of place in finished singing. What García had in mind in advocating the glottic stroke is declared by many of his graduate students to have been something entirely different from a violent explosion of the tone. All he sought was the starting of the tone without any previous escape of the breath. The stroke of the glottis, strictly so called, has been almost entirely abandoned by vocal teachers. Later authorities modified this instruction somewhat by teaching the ‘slide of the glottis,’ which brings about the same action without the explosive sound of the glottic stroke. Of recent years, owing to the better understanding of the principles of breath control, it has been found that neither the stroke nor the slide of the glottis is necessary. The same result can be reached by bringing the vocal cords to the desired degree of tension at the instant the expiration starts.
Much attention has been paid to the subject of registers, more probably than to any other feature of the vocal action. For a long time it was considered thateach register of the voice must be trained separately and controlled in a special way. Various statements have been made by laryngoscopic observers as to the number of the registers and the actions of the vocal cords in each one.
At present the leading authorities recognize three registers, chest, medium, and head, corresponding to the lower, middle, and higher parts of the range of the voice. Individual voices vary in their possession of registers. Tenors usually have only the medium and head, the falsetto (confined generally to this voice) being in most cases of too effeminate a quality for use in artistic singing. Baritones usually have all three registers, basses only chest and medium. Sopranos may possess all three, although the chest register is seldom well developed in this voice. Mezzos have the chest and medium, and in the majority of cases the head register also. Contraltos possess the chest and medium, but very rarely the head register.
Teachers have in most cases discarded the plan of giving precise limits to the registers and training them separately. It is considered the best practice to bring about the correct action of the medium part of the voice, including command of the crescendo and diminuendo on the single tone, before beginning to develop the higher and lower portions of the range. The compass is then gradually extended upward and downward, care being taken to avoid the breaks which almost always resulted from the older system of training the registers separately.
Assistance is found in developing the low notes by the cultivation of chest resonance. High notes are helped by the use of nasal resonance and also by practice in attacking tones with the liquid or sonant consonants. Both these topics will be considered later.
Three resonance cavities have to be brought undercontrol, each of which acts independently of the others. These are the chest, the mouth-pharynx, and the nasal cavities. As a rule the influence of chest resonance is most marked in the lower part of the voice. The mouth-pharynx (in addition to its almost exclusive province of vowel and consonant formation) reinforces the entire range, and the nasal cavities contribute most to the high notes.
It must not be understood, however, that in artistic singing chest resonance is to be used only on low notes and nasal resonance on high notes. The special function of nasal resonance is believed to be the imparting of brilliancy, point, and carrying power to the tones. While its effect is more marked on the high notes, it must always be present in some degree throughout the entire compass of the voice. Breadth and sonority of tone are supposed to be contributed by chest resonance, and these must also be present on all loud tones, whether high, medium, or low.
Yet as brilliancy and point are more native to the high notes, nasal resonance is always more marked in this part of the voice. In the same way the qualities of tone due to chest resonance belong more properly to the lower and middle tones. On the practical side this is of great importance. It is vastly more easy to secure command of each form of resonance first in that part of the voice to which it is native. When this has been done it is a comparatively simple matter to extend this command higher or lower as the case may be.
It is the usual practice to begin instruction in the management of resonance with the mouth-pharynx cavity. For this purpose exercises on the vowelahare generally first used. The position assumed by the tongue for this vowel is peculiarly favorable for securing an expansion of the lower part of the mouth-pharynx cavity. An increase in the size of this cavity is sought for the purpose of bringing about a correspondingincrease in the volume and power of the tone.
While not directly a feature of mouth-pharynx resonance strictly speaking, the emission of the tone is usually treated under this head. After being generated by the vibration of the vocal cords, the tone is to be directed to the front of the mouth, in such manner that it impinges on the hard palate, just above the upper front teeth. This has for its purpose the freeing of the tone from the vocal cords and the bringing of it forward in the mouth, so as to secure the effect of ‘forward tone’ advocated by the old masters.
For acquiring the effect of forward tone, studies are also used on tones begun with certain labial and lingual consonants. Exercises are given on single tones on such syllables asbah,bee,boo—ma,mee,mo—la,lee,lo, etc. These are practised on notes covering a range of about one octave. Similar exercises are used for obtaining command of nasal resonance. For this purpose the consonantnis especially favored and exercises are used on syllables such asna,nee,no, etc.
Another means of acquiring command of the several forms of resonance is found in certain characteristic sensations which the singer experiences in singing tones of the various types. A tone strongly marked by nasal resonance awakens a sensation of tingling in the forehead and upper nose. A pronounced feeling of vibration in the upper chest, particularly in the region of the breast bone, accompanies the right use of chest resonance. The ‘forward’ tone is characterized by similar sensations in the front of the mouth. When practising exercises for acquiring command of resonance the student is instructed to feel the appropriate sensations, thus bringing the tone into the proper position.
Each form of resonance is particularly favored by certain vowels.Ooandohlend themselves most readily to the acquirement of chest resonance.Eefacilitatesin bringing in nasal resonance, whileahis the easiest vowel for obtaining command of the open throat and the forward tone, the most important functions of mouth-pharynx resonance.
Two marked forms of faulty tone production often call for special means of correction. These are the throaty and the unpleasantly nasal tone. For the cure of throaty production relaxing exercises are generally used. Sighing and yawning on the vowelahwith a free expiration furnish the basis of these exercises. Single tones and descending scale passages are practised in this manner, the breath being allowed to rush out freely and without control. Other directions are frequently given for the correction of throatiness. These include instruction in the support of the tone, the throat being relieved of pressure by a steady and controlled expiration. Bringing the tone forward in the mouth in the manner already described assists in this operation.
An excessive or a faulty use of nasal resonance is looked upon as the cause of the unpleasantly nasal tone. Too great a degree of relaxation of the muscles of the soft palate may bring about this condition. The means most favored for the correction of this fault are, first, muscular exercise in raising and lowering the soft palate, which gives a better tonicity to these muscles; and, second, the imparting of the correct idea of nasal resonance in the manner already described.
Another frequent fault of production, the tremolo, may result from any one of several causes. A lack of breath control may cause the expiratory pressure on the vocal cords to be unregulated and intermittent. Faulty methods of breathing, particularly those in which the upper chest is allowed to collapse at the start of the expiration, may lead to a flabby or ‘wobbly’ condition of the muscles which hold the larynx in place. A lack of support for the tone may result fromthe column of vocalized breath being directed backward, instead of toward its proper point of impact on the roof of the mouth.
For the cure of the tremolo the teacher must analyze in each individual case and locate the seat of the trouble. When this has been pointed out the fault is eradicated by applying the appropriate instruction—controlling the breath properly, placing the tone in the correct position in the mouth, etc.
A clear enunciation of the text is indispensable in artistic singing. This is in one sense not a feature of tone production strictly speaking. It is possible to enunciate with perfect distinctness and yet to use the voice very badly, as is seen in the case of many vaudeville singers. On the other hand, a correct production of tone may be exhibited by a singer whose enunciation is too indistinct to be understood. Yet it is the duty of the vocal teacher to train his pupils in the clear delivery of words, as well as in the other elements of the art of singing.
Special exercises and drills in the articulation of the various consonants are not widely used. Experience has shown that the same end can be attained, with vastly less of drudgery for the student, by paying attention to clearness of pronunciation in the singing of songs and exercises with words. Students sometimes have difficulty with some one or two vowels or consonants. In cases of this kind the master instructs the pupil in the correct position of the tongue, lips, etc., for the particular sound, and if necessary arranges special exercises for the purpose.
How long a time should be allotted to a course in tone production along the lines just described it is not easy to state definitely. Practices in this regard varygreatly among vocal teachers. One reason for this is that tone production is seldom made the exclusive topic of study for any great length of time. Students of singing are generally eager to sing, and teachers are therefore obliged to intersperse their instruction in voice placing with songs and melodious vocalises. Another reason is found in the fact that the musical education of the student frequently devolves in great measure upon the vocal teacher. A knowledge of music, sufficient at least to enable the student to memorize songs and arias and to sing them in time and in tune, is absolutely necessary before the advanced education in the singer’s art can be undertaken. When teachers are called upon to impart instruction of this kind, part of each lesson time must of course be used for the purpose.
While a strict application of the principles of vocal science would demand that the complete course in tone production be covered before even the simplest songs are attempted, this system is almost never carried out logically. The first few lessons are usually devoted to breathing and attack; from then on about half of each lesson time is spent on voice placing and half on songs. In the instruction given on the songs attention is paid to the more strictly musical elements of singing—style, delivery, interpretation, etc., as well as to the formation of the tones. Technical exercises of progressive difficulty are taken up about as soon as the student has acquired sufficient vocal control to perform them. As a rule there is no precise stage at which voice placing work strictly speaking ceases and the technical training of the voice is begun.
It cannot be said that any one teacher or vocal expert has founded an authoritative school of vocal science. There is not even anything in the nature of a distinctively national school. Closely resembling methods are followed in all European countries, as wellas in America. Every famous modern master has imparted his principles to many students who in their turn have become teachers. Yet it is rather rare for any one to take up the profession of voice culture without first receiving some instruction from several recognized masters. This custom has resulted in a general levelling of systems, each teacher selecting what he considers best from all the methods which he investigates. Meanwhile the old Italian method is still recognized as possessing elements of great value, even in the department of tone production, in which its principles are so imperfectly understood by the scientifically disposed teacher. The great majority of teachers seek to apply some of the principles of the old method, notably its oral traditions, which were discussed a few pages back, in conjunction with the practices of vocal science.
Modern voice culture cannot be believed to have reached its final development. Even the most conscientious advocates of the scientific doctrines feel that there is a certain lack of completeness in present methods. Investigations are still being carried on in the various topics of vocal science. It is possible that the near future will see important discoveries in the means for control of laryngeal action and resonance. Some authorities, on the other hand, look altogether in the opposite direction. An abandonment of the doctrines of vocal science and a return to the instinctive methods of the old masters is favored by these teachers.
So far as the course of future events can be foretold, it seems probable that a combination of the two methods, now seemingly opposed, will eventually be brought about. The scientific investigation of the voice has brought to light so much of valuable truth that it would be ridiculous to throw its results lightly aside. At the same time the success of the old method proves that it contained a satisfactory solution of all vocal problems.How the two methods will be fused into one it is not now possible to say. But the only marked tendency is in that direction. We are justified in the hope that its accomplishment will not be long postponed.
D. C. T.