If I play with the embouchure I use for lower notes (pedal tones -> F in the staff) I am fine. If I try to play any higher, the sound gets stuffier & tubbier until about B flat, & I can't tighten my lips up any further.
If I play with the embouchure I use for higher notes (F in the staff up) I am fine. However, I can't play anything lower than am F or so before I lose vibration.
But if I try to switch between the two, (i.e. play a B flat scale through the break) my sound is awful, & the notes don't speak.
Is there a master embouchure for all notes? Or must I continually aim to lower the disruption when switching embouchures? Do I need a new tuba, or new lips
