What is the purpose of the HDMI ports labeled STB and ARC on the back of my TV, and is it important to consider which one I use to connect a Nintendo
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3 Port HDMI/MHL Audio Extractor 4K ARC Audio EDID Setting 5.1CH/ADV/2CH Support Full HD 1080P Full 3D 4K*2K MHL/HDMI Working in Dual Mode HDMI to Achieve Synchronization of Audio Signal Separati: Amazon.co.uk: