I am convinced that there is a trick to playing high notes.
I practice every day (Just about) and have a decent range. I can play up to F above high C.
I watched a video of Adam Rappa popping off high notes with no effort. Now I know what you are going to post. He is a pro that has worked on it for years. True enough, but, he used very little effort and purposely contorted his body to show, I forget what. The point is, no effort, very little air.
My daughter used to play the trumpet. Every now and then she picks it up again. Yesterday I was practising and she came in the room to talk. She took out her trumpet and played up to F above high C with know problem. How can this be?
She and I worked on changing my embouchure so I could hit high notes. I could squeak them but it messed up everything else.
I have a gig tonight and then nothing for a while. I think tomorrow I'm going to mess with it.