DHD Audio Audio 52-7172AXC Dual Embedder/De-embedder2 x 3G/HD/SD SDI De-embedders and 2 x HD/SD SDI Embedders, each: – In, 2x loop through, Out BNC connectors – for 2 audio groups, 8 ch., SRCs – Selectable audio groups 1/2 or 3/44 GPI, isolated, 4 GPO, isolatedminimum firmware 7.4.10