It is a very common thing for singers to vocalize for an indefinite period with no ill effect, but become hoarse with ten minutes of singing. The reason is apparent. They have learned how to produce vowels with a free throat but not consonants. The moment they attempt to form a consonant, tension appears, not only in those parts of the mechanism which form the consonant, but in the vocal organ as well. Under such treatment the voice soon begins to show wear, and this is exactly what happens to those singers who find it difficult to sing the Wagner operas.
The solution of this problem lies in the proper study of diction. The intellectual elements of speech consonants are formed almost entirely in the front of the mouth with various combinations of lips, tongue and teeth. Three things are necessary to their complete mastery.
=First,=--consonants must be produced without tension. It will be well to remember in this connection that consonants are not to be sung. They are points of interference and must be distinct but short. The principle of freedom applies to consonants no less than to vowels.
=Second,=--consonants must not be allowed to interrupt the continuity of the pitch produced by the vocal cords. This is necessary to preserve legato. Some consonants close the channel completely, others only partially. It is a great achievement to be able to sing all consonant combinations and still preserve a legato.
=Third,=--consonants must in no way interfere with the freedom of the vocal organ. If the student attempts to sing the consonants, that is, to prolong them he is sure to make his throat rigid and the pure singing tone at once disappears. He must therefore learn dramatic utterance without throwing the weight of it on the throat. To do this he must begin with a consonant which offers the least resistance and practice it until the three points mentioned have been mastered. The one which will give the least trouble is l. At the pitch G sing ah-lah-lah-lah-lah, until it can be done with relaxed tongue, with perfect continuity of tone, and with perfect freedom in the vocal instrument. In the same way practice n, d, v, th, m, and the sub vocals, b, d, g. Always begin with a vowel.