First off I dont reccomend tounging for warm ups. Buzz without tounging. I had that problem just recently. As for the chin drop. I reccomend you catch yourself when your about to drop your chin.....slow down the notes you are playing and then when you feel your chin is about to drop, stop it, repeat this until you break your habbit. Personaly Ive only been playing for 3 years, and as a professional for 1.Hope this info helps
mamsbestrumpeter
