How should I form my lips while playing? My director says that I roll in my top lip while playing, and that I need to break that habit. She says it's bad for my embouchure. This is how I've always played, I can't help it. She also says that I sometimes have a screechy, scratchy noise to my tone, due to my embouchure. Does it matter how you form your lips, and how do I get rid of that scratchy sound while playing?