Problem in high register

[Bone24]

Hello!

For a couple of months I have been noticing problems in my high register when playing forte.

Eb, E, F and G of the second and third additional lines sound with good quality on piano or mezzoforte. But when I play them at f or ff the sound opens up too much and the notes crack. I've never had this problem before and it worries me a little.

I would like to know if it has happened to anyone else. What advice can you give me to correct this? Thank you for your attention

[Wilktone]

Can you post video? No way to say what's going on without being able to see and hear it.

[MStarke]

As David said, there can be so many reasons, it will be impossible to give you an analysis without further details.
You might be able to rule out some obvious equipment-related issues:
- Have you changed anything equipment-wise lately? Of course a mouthpiece change can be causing issues like that
- Have you made sure there are no obvious issues with your equipment? I once had one of my kids' toys stuck in my bass trombone bell. And it took me a while to realize that this time the issue wasn't me. Also just cleaning the mouthpiece and/or slide CAN be a quick fix. But I would hope that is not the reason

Other than that - best is to have a lesson and/or someone look at what is happening with an educated outside perspective.

[timothy42b]

You need to share video, but...

From your description I suspect you're approaching those notes from below.

Does the same thing happen when you approach from above?

[tbdana]

When I had a similar problem long ago, someone told me, "Put more lip in the mouthpiece." I think he meant that I was doing a smile technique or something. Anyway, it made me change my embouchure, and my range improved.