Need advice on 4K matrix

[RodH]

Hi, 

Im new to this.

I have a project with 5 TV's and 1 home cinema. 1 of the TV's has a Bose lifestyle 650 surround sound unit.

The client would like to share content between rooms, my question is do i need the audio downmixing version of the 6x6 4K matrix or not? (can someone please explain the difference)

My thoughts was i could just run the HDMI in the bose zone direct to the TV and then an optical down to the Bose player, and a HDMI direct to the Home Cinema receiver?

thanks in advance.

[Topfox]

In my setup the installers had issues with my FIOS STB and my 4k matrix when trying to enable sound through my russound system. When switching to that audio source it would make a crackle sound and no play sound. Switch off of it, then back on to it and it would play. I grew out my system a bit and went from a 6x6 with no down mixing to the 8x8 with down mixing and I no longer have that issue. They think there was something going on with the set top boxes not truly switching to stereo or some along those lines. 

[mstafford388]

It's almost certainly the cable box was sending a multi-channel audio format that the non-downmixing switch couldn't handle. I've seen a few boxes that don't even have the option to send a 2 channel option like PCM.