Thank you for your answer.
My Linux host works fine. I have two microphones, one connected to the onboard card and a second on an external usb SoundBlaster.
Inside the VM, I can only see the USB as input device, but it does not work. No crashes anymore, as I wrote above, I did a re-installation of host. However I have no sound either.
I tried to use the onboard mic, but I cannot find any options/setting to use that, I get only one option, the usb, which it doesn't work.
