Amazon.com: Neoteck 1080P HDMI Audio Extractor, HDMI to HDMI + Optical TOSLINK SPDIF + Analog RCA L/R Stereo Audio Video Splitter Adapter Converter for Blu-ray DVD Player Sky HD Box PS3 PS4 :
QVS HDMI 4K Audio De-Embedder/Extractor with HDMI Pass Through Port HD-ADE4K - The Home Depot
HDMI audio extractor chip with I2S pinout | diyAudio
What is an HDMI to Audio Extractor and How Does it Work?