gdong

Jim Thomson's "Buzzing Basics" are a godsend. I did them for 4 years staring from a complete embouchure switch. they generate your air, and plenty of gas! I highly recommend it, but it takes dedication and persistence!

Also, make sure you are fundamentally set up to be able to play in the upper register. I was all messed up in this regard, spend 5 years of my life practicing 10X as much as everyone else to get the same progress. Had an awesome teacher help me switch and threw in buzzing basics as the medicine. I'm happier than ever now!