Ok I have heard quite alot of stories of people saying that their high range is crap. and that it doesnt speak properly on this instrument. thats a load of Bollocks!!!
If you are suffering from insturmentphobia then relax when you play. I have a thing about relaxing when I play. We all know the basics well SHOULD know the basics of trombone playing I mean we can all get a note out of the instruments right? so now we have to cut the questions out of our playing style. just trust your self and use your ear. and PLAAAAAAAAYYYYY with all your fantastic trombone sounds free an open.