Originally Posted by byron69
7.1.4 is a limitation of Home Atmos format at the moment.
No, it's not. It's a limitation of DSP chip processing in mainstream processors (ranging from Onkyo to Datasat), but Trinnov can render discretely to any speaker configuration supported by Atmos (e.g. 9.1.6 with wides and top middles, 11.1.4 with wides and front side surrounds, 9.1.8 with wides, front heights, top front/middle/rear heights), etc. as supported by the Altitude license you have for the available number of channels. Likewise, Storm Audio has an embyronic version that can do 9.1.6, and Denon/Marantz has a flagship that can support 7.1.6 or 9.1.4, but that's it until Monoprice or Emotiva (LOL) proves successfully otherwise in the DSP world.
All of these are "Home Atmos". That is, they utilize the Atmos plug-in rendering for the layout(s) supported by the consumer version of Atmos, as opposed to the theatrical. How much to do so is, in the case of everyone by Trinnov, limited by DSP processing power.
What is a practical limitation is how mixers and the studios utilize these channels. As we've lamented to death, Disney is fixated on hard-wired 7.1.4 mixes, but other studios aren't quite so limited by and large. You can have mixers that JUST assign objects in space so that they can be reproduced by 9.1.6 or 11.1.6, others that are very free form in what they do (see the mix of The House with a Clock on Its Walls or Gravity) and liberal with where they decide to encode objects in space with the metadata, mixes at are "just" 7.1.6 (I want to say Kingsman), and so on.
One of the interest of the Altitude 32 is that you can use the other channel in order to work with bi-amp or tri-amp your front speakers L,C,R, you can use some channel to create an array like on a real cinema configuration for non-atmos content, etc
True. Note that you can't currently do an array like theatrical Atmos where you have multiple speakers natively reproduce an object passthrough to, say, front surround 1 to multiple front surround speakers accurately in dimensionalizing the object space, meaning avoiding the six foot tall helicopter blade as it passes through all arrayed speakers at the same time. Home Atmos doesn't "know" what an array supposed to be.
But I agree that the price difference is very important. That’s the reason why I’m trying to convince me that I should order the A16 instead of an A32....
Depends on your needs. And that, as Trinnov is noting in the articles Jon Herron's penning for WSR as well as the designs supported by The Cedia Designer (which I have a subscription to, BTW), is directly related to the number of rows and seats in an HT as well as how wide the front LCR speaker angles are, which gets into viewing angle and feasible screen width. Whether you need channels available for active crossover such as bi and tri amping, or multiple subs, layouts designed to support remapping (e.g. needing to have a Ctf due to a center channel located below the screen to pull the center channel image up), or wanting extra channels available outside of some Atmos layout to better support Auro or DTS:X Pro is up to you.