4K HDMI Audio Break Out Extractor Adapter TOS Optical & 3.5mm Jack
HDMI Digital Audio Extender over CAT.x with SPDIF, IR, Serial, USB, PoH, supports 3.5mm analog stereo audio and Toslink digital audio, EVBMUN-M2210
Can You Use HDMI and Optical Audio at the Same Time? - Pointer Clicker
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