Just a quick follow up to this.

Sky Stream set to output DD works fine as expected with the HD621 in the MC system.

It seems my old Pioneer Kuro does not like DD in on HDMI so the Sky Stream is set to PCM and the TV optical passes through into the speakers. This dicovery was important because it means that an HDMI splitter sending DD to the 2-channel system (*) would send DD to the TV so the "working with and without the AV system" use case would not work.

(*) I had intended to install an SSP to do the DD decoding, albeit it is a 2-channel system.


As an aside, for those of you considering the Sky Stream option, my initial observations are:
- make sure you have the latest type of router - Sky Stream seems to use unicast for the Sky channels and that does not play well with old(er) router/modems (guess how I know)
- picture quality is very good, an obvious step up from satellite (Sky+HD in my case), some content looks almost UHD-like
- the user interface/remote control needs work and familiarisation, especially moving from Sky+HD


Now need to consider a new TV and how to do ARC/e-ARC into a G68...

In the spirit of Spinaltap, I would like to confirm that I am not involved in the corrupt theft of a global sport.