That said, there is one specific change I’d like you to make in the position of your mouth as you go higher: I want you to drop your jaw without tilting your head down. As you ascend the scale, the back part of your throat tends to close a bit, making the sounds coming out of your mouth seem smaller. Dropping your jaw compensates for that change by creating a large resonating cavity in your mouth that amplifies the higher notes. Be careful not to throw your jaw down in a spasmodic movement. Let it slide up and down in a gentle fluid motion that creates no pressure in the muscles of the jaw.
