I have a really good friend who's having some serious embouchure problems that I can't seem to solve. It causes her lower jaw to vibrate violently at any pitch at lower volume. I've tried getting her to rearrange her embouchure, open and close the jaw and lips, put more and less pressure on the mouthpiece and many other things, but nothing seems to affect this problem. Until this started to happen I'd never seen a problem like it. I know it's not lack of practice because I've never known anyone practice as much. I have a feeling there might be a psychological problem as well, because the problem seems worse when someone else is listening and durng rehearsals it gets worse when the parts are exposed. This could just be a confidence thing though, because she is very conscious of the problem - how could she not be. :cry: If anyone has come across a similar problem and knows of any strategies to improve the situation I would be immensely grateful. This one is beyond me. My friend is a baritone player, BTW.