Thank you Geof @Geoff_Coupe for all these explanations and insights. In Windows 11 odyssey
I just got the Merging Technologies hotline this morning and they allowed me to reinstall the Merging Audio Device (Merging RAVENNA/AES67 Vitual Audio Device Installer - 3.2.0 build 50895).
Many thanks to them!
This driver works correctly again on my PC, even if officially this one is not compatible with Windows 11.
On the other hand, software like Pyramix or Pro Tools does not yet work on Windows 11.
So I came back to the same starting point of the beginning of last week.
Roon’s log files reporting the same malfunctions.
You are right, although I find the members of the forum very sympathetic and undoubtedly competent on computer subjects in general, I will wait for Roon Support team to come back to me.