Yeah it’s a bit of a pain. My wife loved this feature when we first got it. Mine will connect but I get no volume control from the TV remote. It just makes it unusable. Naim said that they thought it was my TV software update but I am not convinced.
I reported the issue to Naim as requested by @Naim.Marketing at the time detailing the issues.
Naim support replied asking me for the exact same details I had already provided. It does appear Naim are exceptionally busy, and support for all customers must be really difficult but it is a shame the functionality is not correct on what is, after all, not a cheap bit of kit.
Nova is a lovely unit, I really enjoy the streaming aspect and the occasional vinyl spin but the tv is used often and the volume thing does annoy me.
I used my Panasonic TV on the HDMI arc with my Mu-So with very little problems. When I got the Nova in early May I had to cobble 2 HDMI leads together with a connector to make a lead long enough while I sorted out the final positioning. This threw up small issues on a regular basis. I changed the cable to a regular 5m HDMI v2.0 and have no problems in the last few weeks. The HDMI does have lip sync adjustment.
The implementation of the HDMI standard seems to be varied to say the least. I have heard that Samsung seem to be the most problematic and Panasonic one of the better ones. I think it is a bit harsh to lay this at Naims’ door, when it seems to be more of a issue for the TV manufacturers and their implementation of HDMI. The AV forums are littered with people have soundbar issues with HDMI arc implementation.
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They need to know. Otherwise they can’t improve the product. My praise for the Atom on these pages and on YouTube easily outweighs the negatives I have mentioned. 
It does seem that there are more issues with Samsung tv’s than others, although in my case the problem definitely worsened after the last update. I’m not trying to lay this at Naim’s door, just outline the issues I’ve experienced is all.
There are a lot of Samsung tellys out there!
Yes, and Samsung has been known to break HDMI ARC with their updates, see e.g.
Search the forum for Samsung HDMI brings up lots of similar stuff
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Well mine is LG so it’s not just Samsung.
It does seem that HDMI and HDCP compatibility has always been a moving target, and as soon as there are any firmware changes on TV sets then all bets are off. IIRC Naim have at least one ex Samsung engineer in R&D, so if you are having issues, please let Naim know, giving as much detail of supporting kit as possible.
I have a lightening (Apple iPhone) AV adapter, which mirrors my iPhone screen to my TV. If I plug the HDMI into the Nova will that play Apple music? (Maybe this is better asked in the Apple Music thread but…)
Does it have ARC?
I really don’t know…guess not? Is there a difference in appearance?
If your TV has ARC on one or more of the HDMIs then I would guess you’ll get any sound from the TV routed to the Nova.
It’s not a smart TV, I’m connected to the Nova via analog cables.
Oh OK, that should work too. Sorry, thought you were wanting to use HDMI.
Is plugging the iPhone directly into the Nova with an HDMI (HDMI ARC?) Nova possible?
No, that likely won’t work - the HDMI in the Nova is ARC only.
I’m using my Nova with a Samsung TV via HMDI Arc.
In January I upgraded my TV to a Q10 Samsung and found HDMI ARC wouldn’t work so I had to revert to an optical connection for it to work. However after upgrading the firmware on the Nova I decided to check HDMI again and it worked!. I do notice that when I connect, the TV sound goes off for several seconds before the sound starts through the Nova. I have also had to adjust the input trim on the app to increase the volume.
Yeah, I struggled a lot with my LG until giving up on both ARC and optical from the TV and rearranging the entire setup so I could get audio from all the various sources directly into my Linn DSM.
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I didn’t say it was just Samsung
I was just adding information. Don’t take it personally.