Speaking first of the classification of voices, many young singers are put much in doubt and dilemma because they are unable to determine what sort of voice they really possess, whether soprano, mezzo or contralto. Of course, it is easy enough to distinguish between the extremes of these, between a "real" tenor and a low bass, but the difference between a high baritone and tenor is rather more difficult to discern, and a young man studying has often been at great disadvantage by imagining, for instance, that he had a tenor voice and trying constantly to sing music too high for him, since he in reality had only a high baritone.
In the course of development a voice very often increases its range and changes its quality sufficiently to pass from a baritone to a tenor, and it is sometimes a problem to place it during the transition process. Perhaps the surest way to determine the real character of a voice is to see on what notes words can be most easily pronounced. For the average tenor the notes up to A above middle C, for the baritone, D above middle C, and for the bass up to middle C itself, can be pronounced on the best.
One should never try to change the tessitura, or natural character of the voice. A voice will become higher just when it should by the development due to rational work and never by forcing it. Nothing is easier than to force a voice upward or downward, but to cause it to "recede," as it were, in either direction, is another matter. A baritone who tries to increase his upper range by main strength will surely in time lose his best lower notes, and a light tenor who attempts to force out notes lower than his range will never be able to sing legitimate tenor rôles, and after two or three years may not be able to sing at all.
It may be well to speak now of a very important point in singing—what is called the "attack" of the tone. In general this may be described as the relative position of the throat and tongue and the quality of voice as the tone is begun. The most serious fault of many singers is that they attack the tone either from the chest or the throat. Even with robust health the finest voice cannot resist this. This is the reason one sees so many artists who have made a brilliant debut disappear from sight very soon or wind up later on a mediocre career. Singers who use their voices properly should be at the height of their talents at forty-five and keep their voices in full strength and virility up to at least fifty. At this latter age, or close after it, it would seem well to have earned the right to close one's career.
A great artist ought to have the dignity to say farewell to his public when still in full possession of his powers and never let the world apprise him of his falling off.
To have the attack true and pure one must consciously try to open the throat not only in front, but from behind, for the throat is the door through which the voice must pass, and if it is not sufficiently open it is useless to attempt to get out a full, round one; also the throat is the outlet and inlet for the breath, and if it is closed the voice will seek other channels or return quenched within.
It must not be imagined that to open the mouth wide will do the same for the throat. If one is well versed in the art, one can open the throat perfectly without a perceptible opening of the mouth, merely by the power of respiration.
It is necessary to open the sides of the mouth, at the same time dropping the chin well, to obtain good throat opening. In taking higher notes, of course, one must open the mouth a little wider, but for the most part the position of the mouth is that assumed when smiling. It is a good idea to practice opening the throat before a mirror and try to see the palate, as when you show your throat to a doctor.
In pronouncing the sound "ah" one must always attack it in the back part of the throat, taking care, however, before uttering the syllable, to have the throat well open; otherwise what is called "stroke of the glottis" occurs and the tone formed is hard and disagreeable. If you ever hear this stroke of glottis on the attack, you may know that the singer did not attack far enough back in the throat.