The 4K x 2K HDMI Audio Extractor extracts the digital audio signal from the HDMI input and converts it into a 2-channel stereo analogue output. 1 x HDMI Audio Extractor. Support 4K 3D. 【High Resolution】HDMI audio Extractor Support 4K2K@30Hz/3D /1080p /1080i /720p/576i/480p/480i.