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Yes, had installed everything as it should.

I have a beamer installed on my AV receiver and the device was switched off. So I worked with my touch creen monitor.

As you mentioned the audio drivers I switched on the breamer and checked if the HDMI output was set as standart audio output which was not the case, I think.

Now everything seems to be working as it should.

Thanks for your help.

I hope I can get back to you in case I still get some problems.

Thanks again.

Take care.

Guido