For all students it is important to be able to
buzz with just the mouthpiece, or buzz just the lips. There are
many fine brass players that swear by buzzing. I am a fine player
and I swear, that buzzing is not an appropriate approach to horn
playing.
In difficult days, such as with a bad cold, I find
that buzzing helps but only rarely.
If you can do it, then you have learned it; move on.
I don’t sing by tightening
my neck, no should we play horn by tightening our lips.
Relax and let the air out. Keep your lips open
to let the air flow, making a beautiful resonate tone.