Hi, here is a more Bass Trombone specific question: Unfortunately, I have some difficulties to play loud pedal notes, even a Pedal Bb! Extremely, when I played for a while and then have to play a loud pedal Bb, for instance coming from mid range with a couple of notes and and then play the pedal note or when having a pause noted before and then have to play the pedal in ff. Sometimes my lips won't vibrate with the flexibility that is needed in these registers or sometimes it is only not loud enough, even when I push a lot of air in. I is not cutting through enough for what it is needed on such parts. What do you think, what might be wrong? Do you bring more of your lips into the mouthpiece in such ranges or do you more or less go for a wider embouchure, so that less meat is in your mouthpiece? Is there anything, I could practice and improve this to be prepared for the next ff pedals?