Amazon.com: 4K HDMI to Optical Audio Converter + HDMI PCM 5.1 7.1 to Analog Surround Decoder : Electronics
Amazon.com: HDMI Audio Extractor 4K Splitter to Optical 3.5mm AUX L/R Coaxial Audio Adapter Converter 8 EDID Settings Supports HDCP 1080p 3D Dolby Digital DTS 5.1 PCM for PS4 PS5 Xbox Fire
A Guide To Digital Audio Out (Optical, PCM, Coaxial, Etc.)