Cheapo HDMI Audio Extractor - some measurements | Audio Science Review (ASR) Forum
Amazon.com: Blackmagic Design Mini Converter SDI to HDMI with Embedded Audio : Electronics
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