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Octava's HDS31A 3x1 HDMI switch with L/R audio routing is made for legacy HDTVs | Engadget
Octava HDMI SW4A 4x1 4K HDMI Switch w/ Optical Audio I/O & Coax Digital Audio | eBay
HDMI Switch-UHD41-ARC – Video Over IP and HDMI Video Connectivity Solutions.
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Octava HDMI SW4A 4x1 4K HDMI Switch w/ Optical Audio I/O & Coax Digital Audio | eBay
Octava intros 3x4 HDMI 1.3 distribution amplifier | Engadget
ReviewMeta.com: Octava HDMXA71-4 X 2 Hdmi Matrix Switch with Optical and 7.1 Analog DAC Output . USB Port for Edid Management(HDMXA71-ip) Amazon Review Analysis
Octava HD41-ARC-UK - 4x1 HDMI ARC + Digital Audio switch - With TOSlink (Digital Optical) Audio Output (Audio Return Channel / 3D / CEC, v1.4) - IR, 1080p Full HD, SkyHD, Virgin,
HDMI Matrix Switch-UHD44MX-IP – Video Over IP and HDMI Video Connectivity Solutions.