I have been playing Trumpet for 7 years now. I've never had any private lessons and I pretty much taught myself how to play trumpet. I believe I am a really decent player for high school level, however I wanna' detach from only being a "student player" and dive into the Professional zone. For the past year I've been playing alongside high-level musicians that astound me everytime I hear them play. I've recognized that I am definetely one of the weaker players in the group and I wish to improve my technique to come to par with these people. In order to do so, I really need to imporve my technique. Does anyone have any reccomendations on how to improve the following:
Lip Trill (Frequent in Jazz)
I'd really appreciate some feedback.