yep thats what I ended up doing for the main room I was looking for this capability in. For the other areas I have a lot of duplicate sources, ex I have 6 Nvidia Sheilds. So I just dropped half of them down in their audio capabilities, and labeled them as such. That way if I know there might be a chance where I want to share audio with the house speakers I know to just use one of those downgraded sources. Its working so far. Wish one of the audio convertors that are like 50-100 could downmix Atmos.