In-Ceiling Speakers Wired Simultaneously to Chromecast Audio and A/V Receiver
I'm in the process of building a home and I'm considering going with an all-home audio system, multiple 5.1 surround systems, while also cutting the cord with DirecTV/local cable company. I'm considering an HD antenna in the attic that's wired to all rooms, along with something like a Roku Ultra or Chromecast Ultra for streaming. Let's say Roku Ultra for this discussion. I have a great room on the main floor that will have a TV, along with a larger living room in the basement that will serve as more of the theater room. I'm considering 5.1 in-ceiling speakers for the great room; 5.1 in-wall center channel, in-wall front left/right, and in-ceiling surround speakers in the basement/theater area; and a sound bar for the master bedroom with in-ceiling surround speakers. I'm also planning on some in-ceiling speakers for the deck, kitchen area, etc.
My question is - can I have in-ceiling speakers wired to both a receiver (for the home theater) and to a Chromecast Audio dongle? My thought is I'll control the home theater audio via Roku Ultra (or the TV, or the TV's receiver, etc.) and I'll control the whole-home audio via Chromecast apps. The same would apply to the master bedroom where the in-ceiling speakers would be connected with the soundbar as well as the Chromecast Audio dongle.
I'm also considering adding a Google Home to be able to control the whole-home audio via voice controls.
So in addition to my question, I'm open to any other suggestions/feedback you have. Thanks in advance!