| Pots,
This problem is easily solved although I will say that it is a typical one for developing players.
There's a technical reason this happens that I'm not going to bother getting into. It's the same problem that makes the C to D trill challenging when you first learn it.
Here's what you need to do:
Grab just your mouthpiece and play the solo absolutely in pitch on just the mouthpiece. Do that three times without mistakes and perfectly in pitch. Now do it on the trumpet and you'll notice you can play it fine. The reason you can play it now is because your ear is sending the right signals to your lips instead of only your fingers.
As I say, for right now, you don't need any more explanation than that. Let your ear tell your lips what to do and enjoy musical mouthpiece buzzing.
Play well!
ML |