Amazon.com: HDMI Audio Embedder Inserter Digital Analog Audio + DVI to HDMI Support TOSLINK Optical 3.5mm Jack AUX Audio Input 4K60Hz 18Gbps HDR CEC HDCP2.2 : Electronics
Hall Technologies (Formerly Hall Research) HD-AUD-IO HDMI 2.0 Audio Inserter & Extractor
KanexPro Audio De-Embedder with HDMI Video Output HAECOAX B&H
Tripp Lite HDMI 4K Ultra HD Audio De-Embedder/Extractor at Lowes.com
Monoprice Blackbird 4K Series HDMI Audio Inserter - Monoprice.com