What did Dyer-Bennet think of his own voice? This is what he would say: "My voice is pretty good but it is not that good." Sometimes he would add: "I got away with murder."

Don-

You may want to start the octave jumps lower, say, G below C below middle C. You have difficulty at B below middle C, so on the octave jump if you have to break into a falsetto go ahead. Just be sure to keep the upper note soft. Don't squeeze the tone, use open "ahs."

To loosen up your larynx, move it up and down (without making a sound). It helps if you swallow. Kermit the Frog does this very well.