HDMI to RCA Audio and CVBS NTSC, PAL, or S-Video Converter : ID 3537 : $34.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: avedio links 4K@60Hz HDMI Audio Extractor, HDMI to HDMI + Optical Toslink SPDIF + 3.5mm AUX Stereo Audio Out, HDMI Audio Converter Adapter Splitter Support HDCP1.4 Full HD 1080P 3D :
HDMI to HDMI Cable for Ultra High-Definition TVs, 1080p, 6-ft. | Eaton
Amazon.com: Tendak 1X2 4K HDMI Splitter with Audio Extractor + Optical and R/L Output Powered 1 in 2 Out Signal Distributor Support 3D for PS4 Xbox One DVD Blu-ray Player HD TV
HDMI Audio Extractor,4K HDMI to HDMI with Audio 3.5mm AUX Stereo and L/R RCA Audio Out,HDMI Audio Converter Adapter Splitter Support 4K 1080P 3D Compatable for PS3 Xbox Fire Stick.
DVI & S/PDIF Digital Coax/Optical Toslink Audio to HDMI Converter
2 Meter (6.56 FT) HDMI Cable with 6FT Toslink Audio | Computer Cable Store