Amazon.com: eSynic 4K HDMI Audio Extractor HDMI to HDMI + Optical TOSLINK SPDIF + Analog RCA L/R +3.5mm Jack Stereo Audio Video Splitter Converter with Power ON/Off Switch Support 4K Full HD1080p
Shinbow SB-5610 HDMI Audio Extractor-Arc-Spdif-Analog Stereo Control Box
Extract Audio from HDMI: Here's How to do it! - Descriptive Audio