I also use MKV's for my Atmos rips. I use Kodi. Kodi can play Atmos audio only rips but I haven't found a way to have them play gapless, so I use MKV for now, and edit all the chapters to the song titles.
I just stumbled across the new Atmos 16 channel processors because
@ted_b posted he was looking for one with balanced connector's. I started reading the reviews and the HDMI problem stuck out because that would be a total deal breaker for me. That was a week or two ago and I haven't followed up.
Personally, I think Atmos is first generation stuff, and I am not going to invest that much in this format. The process from going from 2D to 3D shouldn't rely on a local process, it should be done in the studio with higher quality processors. We already went through this with quad and SQ, QS and other non-discrete formats. To me it seems like a sales gimmick to get you to buy an infinite number of speakers. Eventually, quadraphonic went from decoding two channels into four, to 7.1 discrete channels. Until that happens with 3D, where all my channels have been processed in the studio properly, rather than relying on different chips at home, I will not break the bank. Hopefully the next generation 3D audio will be 16 discrete channels or something resembling it.
That's not how 3D audio works at all. Since it's object based, for the studios to pre-process it, everyone would have to have the exact same setup, basically. The speakers would all have to be the same efficiency, the positions would have to be pretty exact and dampening and dispersion would have to be roughly the same. The height speakers would have to be at the exact same height...
The reason for this is that each sound is considered an "object" and it places that object into 3D space based off your setup and what it knows about that. The reason for adding insane amounts of speakers? Pretty simple, because with each set it can get more and more accurate with the placement of those objects.
Otherwise, you just have a pre-rendered track selection, which would probably come to consumers as 5.1.2, and then have to be upmixed to go beyond that. Same with most 5.1 audio content and 7.1 or 9.1 etc setups.
With object based audio it can also make actual use of however many channels are available without upmixing.
Really though, it's a new technology and sound engineers, masters, mixers, and end users have to change their entire way of thinking about how mixes are done. Simply put, you can't really pre-render it because it will heavily rely on your setup. But also, this kind of sounds a bit like mistrust of new tech. But you have to remember, what we're able to do processing at home compared to what we were able to do even just a few years ago has radically changed. The theory behind the technology is solid though. It's simple physics that was, until recent years, unfeasible or impossible to achieve without very large processors and computers, and likely dedicated processors. But as I said, what we can do today on our smart phones is more than most people could do on multiple home computers in 2010. And we can even process stuff in real time we couldn't even play back pre-rendered then.
Is the tech really new? Yes.
Is it a completely new paradigm of audio playback and processing? Oh yes indeed.
Is there a lack of content? Definitely.
Is it finally starting to see enough adoption for content creators to take it seriously? ehhhhh...
And this is where I get on my soapbox a bit about early adopters and why we need more of them... plain and simple... demand dictates supply. If people aren't buying Atmos content, or playing it back on streaming services, it will never be taken seriously. This is pretty much why SACD was only ever niche outside of Japan. I think most of us here know that SACD is pretty damn cool and a legitimately better technology than Red Book CD, right?
Know why there's not a ton more multichannel SACDs, SACD players, and it's impossible to find SACDs anywhere but audiophile stores? Because there wasn't widespread adoption. A lot of people probably looked at it and said "I'll get an SACD player when there's more SACD content". A lot of people had SACD players and didn't even know it, or even what SACD was. I'm one of them, via PS3, hell I might have had more than that in the form of several DVD and Blu-ray players. I had no idea what SACD was before about a year ago. Now I'm a multichannel addict. And I LOVE Atmos music, in fact, I subscribe to Tidal just for it, despite having a subscription to Qobuz because I refuse to use MQA for moral/ethical reasons.
But there's not much content for Atmos, especially music. And it's slowly getting better, but it's not getting better fast enough. Maybe that'll change if Spotify or Apple Music ever support it, but likely not even then, at least not until a lot more people start investing in Atmos for home and consuming a lot more of that content. So, as an enthusiast and music lover, I am investing in Atmos and enjoying what I can in it. And not all of it is amazing... but stuff like Kraftwerk's 3-D the Catalog, Glass Animals' Dreamland, and Steven Wilson's the Future Bites are already available and fantastic, and I've heard good things about Abbey Roads and John Lennon, though, Lennon's not really my thing and the Beatles... I could take or leave for the most part.
Oh, and there's a few Elton John songs on Tidal, specifically Rocket Man is phenomenal. Just wish they had more than just a few singles from him and several others (like Rush and Guns n Roses).
And WAP in Atmos is probably one of the funniest thing I've ever heard. But I think that song is about the funniest thing ever.