HDMI to RCA Audio and CVBS NTSC, PAL, or S-Video Converter : ID 3537 : $34.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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.
Extractor - 4K HDMI Audio De-embedder - Audio Signal Converters | StarTech.com Peru (en)
KanexPro Audio De-Embedder with HDMI Video Output HAECOAX B&H
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 :
Insignia™ HDMI Audio Extractor with 4K @ 60Hz / HDR Support Black NS-HZ340 - Best Buy