Gestalt said...
playing scales is good for embouchure, tongue and fingering technique, (yeah, go to town with that one)
then there's fingering, in the high register there are alternative fingering techniques that can be used depending on what scale you are playing to make it easier to play fast runs. that's more for advanced though. once you get better control you can squeal very high notes without fingering.
still i'm going 7 years or so.
oh i forgot to mention, no biting!
Whats that? You can make em sqeal with out fingering. Now thats a boast if ever I heard one!
But seriously, you are right. Constant practice will get you there. Quite often when you seem to get stuck on something going back to basics will help you get past your stuck point.
I have only been playing Brass instrmuents(cornet, trumpet, flugal, tenor horn, baritone, euponium and double b & e flat basses) since I was five(196?) and yet I go back to basics when I get a sticky point. Good breathing techniques are a must also. Practice long notes with deep breathes in between. A good tip for breathe control:- as you breathe out playing a note push your stomach out. It seems counter productive at first but it will give great breathe control