4K x 2K HDMI Audio Extracotr HDMI to HDMI Optical and 3.5mm | Tendak
HDMI vs. Optical: Which Digital Audio Connection to Use? - CNET
NeweggBusiness - Nippon Labs Premium High Performance HDMI Cable 6 ft. HDMI TO HDMI Cable and 6 ft. Pro A/V Premium Toslink Digital Optical SPDIF Audio Cable (Combo Pack) 6 feet