Hi,

I was going to say this is a limitation of the Kaleidescape. But it appears that on the Strato players they are now supposed to be able to do 7.1 PCM. Previous players only did 5.1 PCM.

Are you using the main HDMI output of the Strato into the UHD722 or the 2nd output? It sounds like you're getting some kind of EDID mismatch.

Have you contacted your dealer for support? Hard to know if this is to do with the Kaleidescape, UHD722 config, or even the display you're using.