I have recently discovered a way to improve my range considerably, and my tone quality. I am second chair in my high school's intermediate(which i rightfully should be 2nd chair in my top band, which i have been told by my band director) and my sister, who also plays trumpet, but is 3rd chair in the top band, and she also plays baritone in the beginning band. Well, for the past few weekends she has been bringing the baritone home and practicing, well, while she isn't, i practice it in my spare time. Well, let me say this, over these past two weekends, my range has shot up from me playing a high C with a full sound, to playing a G above that. And my tone quality has improved immensly, so to anyone who wishes to improve either, or both of these, i would try to find some way to get a hold of a baritone, and since the fingerings are the same, once you can center the concert Bb, you can play any scale you know, and anything you like. Then after practicing a part of a difficult song because of range or something, you take your trumpet and play the part, and you will immediatly know the differance. Well, I hope this can help anyone, and can have a better time playing. And if anyone has any more hints, please tell me, I am hoping to hit a super C by the end of my junior year.