At ease, folks, this isn't for screamers - I just want to share some thoughts about building a high(er) register. Forty years ago I played trumpet in high school and for 1 year in university, then switched to the bass trombone (sublime to the ridiculous?) which I played for 8 more years. After about 25 years off I decided to come back to trumpet because that slide-thing was just too much work...and I love to play melodies. Way back then I never even had a useable/tuneable top-of-the-staff G. Alas, our high school music teacher was a viola player. It's now been a year of comeback practice (1+ hours/night) and the range below that G is pretty solid, ie. a million times better than it ever was and getting better every week. I'm playing in a community concert band and covering 3rd in a working swing big band. But G and above was just not happening, until things came together from reading TM and undertaking some intelligent reflection & experimentation. And this is what I now understand: all things being equal, playing high notes mainly comes down to only 2 things: (1) sufficient air pressure; and (2) a smaller aperture - that's it, that's all. What seems to be working wonders for me is to focus on the lower lip and make it very firm, in order to give the upper lip something solid & supportive to vibrate against (never had that before on trumpet, and the chin would always collapse, etc.). I also do some very soft free buzzing every morning on the drive to work to gradually increase the ability and strength of the centre portion of the upper lip to control and close down the aperture. It's now been 2 weeks and the G is very solid after a 2-hour rehearsal, the A-flat and A have both appeared (at last!) and I'm closing on the B-flat. So part of the change is using the muscle set in a slightly different way (lower lip/chin) together with basic strength training to be able to close the aperture. Multiple sets of crunches and increasing numbers of pool lengths are working good things on the air pressure, too. And at age 55, those things bring other bonuses. I figure the rest is just a matter of time. Will I ever be a screamer? <laughing> Not very likely! But if I can work up to a dependable D or E-flat above high C in the next year or so, I'll be one happy trumpet player.