Transformative Engineering launches the HDS-42AVR-- an HDMI switcher the company claims can switch 4K sources in two outputs, one UHD 4K and the other regular HDMI but with muted video.
To be specific, the first output handles all UHD 4K features, including 60Hz refresh rate, 4:4:4 color, 18.2 Gbps bandwidth and support for current audio formats such as Dolby True HD and DTS Master. The second HDMI output presents full audio formats from the selected input, but with muted video (720p sync only).