Now coming to sound, every person, whether he knows it or not, has a certain choice of sound. Although everyone does not study this subject, and man mostly remains ignorant of this idea, yet every person has a liking for a certain sound. It is therefore that there is a saying, a belief among people, that each person has his note. It is a fact that each person has his sound, a sound which is akin to his particular evolution. Besides the divisions that the singers have made, such as tenor, bass or baritone, each person has his particular pitch, and each person has his peculiar note in which he speaks, and that particular note is expressive of his life's evolution, expressive of his soul, of the condition of his feelings and of his thoughts.