Hi I am a high school trumpet player with a question about free buzzing. When I ascend, my bottom lip tucks under my top lip around G on top of the staff. I don't think it is supposed to do that...I can barely buzz up to high C and that is where my range with the trumpet cuts off as well. I know trumpet playing is not all about range, but I have been trying to get the C solid for a long time and have had pretty much no success. So is the rolling in of my bottom lip under my top lip cutting off my range (and probably endurance) due to the amount of work my top lip has to do? If so, how can I fix this problem? Is it just as simple as try to keep my bottom lip form rolling under my top lip when I practice? I have a private teacher, but have not been able to meet with him in awhile due to outside conflicts, so any advice is greatly appreciated.