What does it mean and how do I fix leaky corners in my upper register? I have consistent high D's, my E's are getting a little better and I can play them if I'm fresh, the highest I can squeak daily is a high G (an octave above the G on top of the staff) but that's when I get the most leaky corners, and the note doesn't speak well. It is sort of like talking on the phone while under a tunnel, in and out. I know if I fix the leaking I can get the note to speak better, but does anyone know how I can fix it? And what is causing it? My teacher said it could be pressure, but my face doesn't really hurt after I play. Is it possible it's just because it's new to me and I'm still getting used to that register?
On another note, another teacher of mine told me one time if I'm playing in the upper register (he said it's different for everyone, but usually around A above the staff) to push out your jaw so any pressure you may be using don't crush your upper lip. Thoughts on this?