Verbinding hdmi kabel

oday I connected my Rose RS150B with an active optical 8K high speed HDMI cable to my B&O Harmony, which is an LG TV, but I only get a picture and no sound. I set the resolution of the HDMI to 1920x1080p60, the picture is perfect, but I do not receive any sound at all. The TV immediately saw my Rose. Who can help me? Thanks in advance.

see my other answer.
Works as designed - you cannot use your TV as Speakers, your RS150 needs Analog Connections.