Hi! I would like to connect my Apple TV 4K to my Smart TV with the sound connected through an optical cable to my Sony surround sound system. I bought this product from Digitec (Delock HDMI Audio 5.1 Extractor, 4K, 60Hz) but I get only the picture, no sound. I have the HDMI cable from the extractor connected to the Apple TV, the USB cable of the extractor connected to my PS4 for power, the optical cable connected from the extractor to the surround sound system and an HDMI cable connecting the extractor to the Smart TV. What am i doing wrong? Please help! Thanks