Not sure for C8, but C9 definitely on. LG had did a great job on Dynamic Tone Mapping for HDR.

I believe C8 also did great on that, it is just 2 years ago product which still pretty new.

If you want to watch thru creators intention. Then dtm off.

If you want to add your own flair with puchy hdr although not accurate and not the director/movie intention then dtm on

fentanyl, JustCheeze , madballs

I just check back my previous setting post here. The Value cannot change for Dynamic Tone Mapping for Cinema or Cinema Home Mode.

It is grey out but show ON or N/A, I assume it is ON in this case.

So far I didn't make any changes anymore except recently is De-Judder I put as 4 instead of 2.

I just check now it can, probably some changes is make after firmware update.

But in Dolby Vision mode, Dynamic Tone Mapping setting is not there.

Just use the thing best suite you, they is nothing correct or wrong, it is user preference.

I don't see any crush mid range highlight, it was the best setting for me and I already watch like that few months.

B9 had inaccurate setting by default, probably it impact the output which probably not only did by DTM but others setting as well.

From this article now I know why this feature is not there for Dolby Vision because Dolby Vision already have it owned Dynamic Tone Mapping.

I find it work perfectly, so I am going to stick to On in HDR10.
It make the HDR10 very closed to what Dolby Vision did which is much better. So far I had no complain on all movies I see.

https://www.rtings.com/tv/reviews/lg/cx-oled/settings

When I first tested DTM with just normal content like movies, ya it looks very impressive. Makes HDR highlights "pop" which is very pleasing to the eye. But then I learnt from few people to use some test patterns like the one from Spears Munsil 4k disc to at least adjust contrast and brightness to prevent clipping. Since those test pattern does not require a meter, I tried it. I'm surprised when I enable DTM it CLIPS a lot of the test pattern. You may not notice it because maybe you not sure what it is clipping?

May I know what the different between  color gamut setting  Extended & WIDE?

There are 2 pixel refreshers.

1) The auto version that activates and does a short modulated voltage pulse to all the pixels after every 4 hours of cumulative usage. It's important to understand it is CUMULATIVE and NOT CONSECUTIVE. 2 entirely different meanings that a lot of people seem to get confused over.

2) The manual option which measures the voltage of ALL the subpixels, then sends a full voltage to wear down the pixels that are much higher than the average. This would also mean that if there are a large number of pixels which has lesser brightness than some, the brighter pixels would then be forced to degrade itself so that it matches the average brightness of those pixels which aren't as bright. Usually these pixels are the one taken up by logos or HUDs. By doing so, your TV's peak brightness could decrease. This full field pixel refresher is also set to run on its own after every 2000 hours of CUMULATIVE usage.
It's important to understand that BOTH options DO NOT combat burn in. They can remove temporary image retention and clear up some screen uniformity issues, but that's about it. Don't expect it to work miracles.

To answer your other question, you should not use it frequently and NO it is not necessary. You only use it if there's a very persistent image retention or you have horrendous screen uniformity (i.e banding or DSE).

EDIT
If you're feeling adventurous, you can get an LG service remote and change the time of when the auto refresher and manual refresher activates. But of course, do it at your own risk as one wrong button press in the service menu would brick your TV.

Not at 2000 hours .

Rtings have conducted a burn-in test awhile ago and as you see from the graphs the brightness still remain at the same levels even after 10000 hours .
The color gamut , however has degraded a little but we are talking about 10000 hours of torture tests here .

And they probably have ran hundreds of pixel refresh cycles , manually .
I am sure there are side effects if you are trying to abuse the feature .

Just don't do it if you are not having any problems with the PQ  , the TV should be doing everything for you automatically .
Another thing is keep in mind is , don't turn off the power plug of your OLED TV instantly after watching a show .
We do that with our traditional TV but not OLED TVs . The TV needs to be dormant but with power on to run pixel compensation cycles .

I suspect a lot of ppl who had sudden burn-in issues are guilty of this .

Been watching or reading reviews. Many say LG have more pop which I take it to mean the color are more saturated. And Panasonic/Sony are more cinematic which I take it to mean the color are less saturated/more dull in comparison/more natural.

I would like to ask. Can a LG be tuned to have less pop to become more cinematic like Panasonic/Sony. And vice versa? Or pop or color saturation are inbuilt and can't be changed?

You can check with the HDMI diagnostics menu screen.

As to how to access it, check this post here - https://www.avsforum.com/threads/2019-lg-ol...4/post-58775690

I do agree that they should have a general info button on the remote though.

Where did you read that calman home needs periodic fees? It's been a one time purchase all this while, no?

Used displaycal long time ago too. It's not bad but it's a little too option light for me. Decent tool for beginners though as the interface is pretty easy to use.
Yes audio passthrough is possible via ARC for Dolby Atmos, it'll be in lossy Dolby Digital+ format however. If you enabled ARC, it should just work otherwise check your receiver settings?

I have no issues passing through Atmos from the internal netflix app on the TV to my receiver.

Just another question, you do have height channels connected to your receiver right?

Make sure ARC is enabled on the TV side as well?

Make sure ARC is enabled on the TV side as well?

why no 55inch aiks..