ROOFULL 4K HDMI to HDMI and Audio Output (SPDIF Optical + 3.5mm AUX Stereo), Premium HDMI Extractor Splitter Converter Adapter for Apple TV, Fire TV, Blu-Ray Player – ROOFULL Official Website
hdmi to optical audio - Newegg.com
HDMI 4K (18Gbps) Audio Extractor with HDCP 2.2, Dolby Atmos, and DTS-HD Master Audio