So I've been playing Euphonium for 3 years and play it in most of my high school bands and my wind orchestra outside of school. I now double on trombone to play for my school's jazz band. Currently I'm having trouble in producing a nice tone. When I record myself, the trombone sounds like a Euphonium and I don't think my air is supported enough. Does anyone have tips on how to produce a nice, sweet, and warm tone on trombone???