Okay I got one step further:

Inspired by this post, https://www.earmaster.com/community/forum/2/5472.html,
I recon that wine runs by default in classic mode. And I got the same visualization issues with notations.

So, I downloaded a simple .msstyles theme (e.g. Windows 10 look)
Configured it in ...

Hey there

I'm evaluating Earmaster 7 (yet the demo) on my Ubuntu 22.04.
The UI basically runs and I can hear sound in the lessons ... the micro works too. so some basic tutorials work already.
Which is pretty cool, I was less lucky with an older Wine+Ubuntu version some months ago.

However, there ...