Question about Delock HDMI Audio Extractor

I have not used the product for a long time. Dolby had worked in each case. I cannot judge the other formats.

I no longer use the product either. Unfortunately, I couldn't get it to work between the Swisscom box and the Denon AVR receiver (which worked straight away with a Sonos (Flexson) audio converter). Now I use it "only" between my notebook and my HDMI monitor. I have no problems there. However, I only use the analogue output.
Unfortunately, I can't answer the specific question.