I think I will give this a spin, I have an old unused 562v2 I can deploy just for use of the MSR to switch HDMI sources. I was wondering too about whether the HD621 will pass full 96k or 192k resolution without MHR if that is what the HDMI source is outputting. This will go into a Devialet, so I will not be restricted to 48k. Is there an easy way to know if the Devialet is receiving 48k, 96k, or 192k to be able to test it? I also have an Oppo BDP-103D and a Prism Orpheus DAC I could use for the test if that would make it easier.