Would most home theater setups in a typical home theatre even need more than 12 channels, supposing that Home ATMOS supported it?
I suppose that would be the case if a person was one of the 0.1% that lived in a cavernous mansion, but the typical middle class home?
When I refer to a system as 7.2 or 7.0.2, I'm defining it as the number of discreet channels the receiver can provide. I don't go by number of speakers. A 7.2 or 7.0.2 system means 7 channels, each driving a single speaker plus two separate subwoofer channels.
If you are driving two surround...
Yes. If you are not using any height speakers sometimes also called presence speakers.
It is the same as a 5.1 system which would be 3 fronts, sides or 2 rears and 1 subwoofer, just 2 more speakers added.
7.1.4 or 7.4.1 is just semantics to me. They mean the same thing.
7 = 3 front, 2 sides and 2 rears.
.1 or .2 = 1 or 2 subwoofer channels
.4 = 4 height or overhead channels
Edit: Whether they are all used in a home video sound mix is a different story, but 7.4.1 is the number of channels...
What is the actual crux here? That setting up a home "ATMOS" system is just a waste of money because the overhead speakers are improperly or not used at all?