Hi, I am a music education major in college and I have been playing the trumpet for about 7 years. Before getting started, I am very dedicated to the practice of fundamentals, and, although I can always improve, I believe I have them managed. My problem in the upper register is that when I am ascending I eventually reach a point (sometimes a high E or G) where the air is passing through the aperture unbuzzed. I use an open aperture (with a slight curl so that I am not on the soft inner tissue) with the Farkas embouchure, and I rely on tongue arch to achieve the fast air speeds. What should I do and how should I go about doing it?