"When singing a rôle, I am always listening--watching--to be conscious
of just what I am doing. I am always criticizing myself. If a tone or a
phrase does not sound quite correct to me as to placement, or
production, I try to correct the fault at once. I can tell just how I am
singing a tone or phrase by the feeling and sensation. Of course I
cannot hear the full effect; no singer ever can actually hear the effect
of his work, except on the records. There he can learn, for the first
time, just how his voice sounds.