Help I have been playing trombone for 5 years now and I recently got braces three months ago. My tone got horrible and I started to puff my cheeks causing horrible intonation. I’ve been practicing long tones and lip slurs for about thirty minutes everyday since I got my braces with little to no improvement. However I was recently given a solo for our spring concert and I sound god awful and it’s hyper embarrassing to play it. Is there anything else I can do. My notes flutter at the beginning and every once in a while my lips refuse to buzz and my playing stops. Can anyone give me any advice because currently I want to swap to front ensemble and play vibraphone or mariba