HDMI ARC to AUX Audio Converter, Cooree HDMI ARC adapter with AUX(3.5mm L/R) and Optical(SPDIF/TOSLINK) port for TV : Amazon.co.uk: Electronics & Photo
Buy Avantree HAX04 HDR HDMI ARC Audio Extractor with Optical and Analog Audio Output Supporting lossy and Lossless Surround Sound, UHD 4K @ 60Hz, HDMI 2.0, HDCP 2.2, Pass-Through CEC with EDID
5.1 Surround Sound Passthrough On TVs - RTINGS.com