Review on 🔀 HDMI Matrix Switch 4x2: 4K HDMI Matrix Switcher with EDID Extractor and IR Remote Control - Supports 4K HDR, HDMI 2.0b, HDCP 2.2, 4K@60Hz, 3D, 1080P by John Kennedy

I have two 4K sources and a 4K TV but my A/V receiver only supports 1080p. I needed a way to send 4K video from a source to my 4K TV and also send the signal to my receiver so it can decode LPCM multi-channel audio. It took some experimentation with the little EDID switches on this splitter and some email exchanges with the provider, but it's working great for me now. It was a lot cheaper than buying a new receiver. In case anyone is wondering, all four switches in the ON position are what I need to get it working.