Marantz/Denon HDMI ARC from LG OLED setup solved

Webbserver

Well-known Member
After much experimentation and lots of frustration, I have now established a faultless setup which never fails to work for me or the family so I thought I’d share it:

I have an LG B865OLED TV and a Marantz SR7011 AVR plus numerous sources, listed in my signature if it helps.
Despite owning a range of streaming devices including the latest Nvidia Shield, I much prefer the video quality of LG’s inbuilt apps especially Netflix. However, until recently I’ve struggled to get HDMI ARC working reliably which is required for the higher audio quality from the likes of Netflix (Dolby Atmos and Dolby D+). The best you’ll get from optical is the inferior Dolby D.

The key for me is to have 2 x HDMI cables connected between TV and AVR.
Also turn off ALL HDMI CEC control in Marantz/Denon and in any other devices. A universal remote is far more reliable than HDMI CEC control.
I had to add a ‘Lindy HDMI CEC less adapter‘ purchased form Amazon and connected between my Nvidia Shield and AVR as you cannot turn this feature off in the Shield even though it says it’s off in the menu!

Marantz SR7011 (or equivalent Denon) settings:
Setup Menu, Video, HDMI Setup, HDMI Control Off, ARC On, TV Audio switching Off and everything else under HDMI Control should be Off

LG OLED (B8) settings:
All Settings, Sound, Sound Out, HDMI ARC. This will automatically engage Simplink (HDMI-CEC) if not already on.

To watch LG internal Netflix app and receive audio via LG HDMI Arc to Marantz AVR:
LG HDMI 2 > Marantz HDMI 1 output (Arc). Manually switch AVR to ‘TV Audio’. This is easily added as part of a Harmony Remote Activity.

To watch source from AVR e.g. Virgin Media:
Marantz HDMI 2 out > LG HDMI 1. Manually switch LG to HDMI 1, switch AVR to HDMI output 2 and select AVR relevant source input (e.g. Cable/Satellite) to display image from AVR to TV. Again, this is seamless if setup as part of a Harmony remote activity.

I hope this post manages to help someone else.
 
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UnixAudio

Novice Member
Thank you Webbserver for your information - it has helped me complete my ARC set up. I wanted to add a few points that left me puzzled and hope this complements your post:

I am using a Marantz SR7015 AVR and a LG OLED G1 myself, with a Harmony setup to automate.

The only thing I wanted to add to your guide are:

- The "TV Audio" input on newer Marantz (and I assume Denon) was hidden - this means it needs to be un-hidden in the input setup menu of the AVR. The clue to this was that the button TV Audio on the Marantz remote had no impact/change. So if you cannot find the 'TV audio' in the list of all your inputs of the AVR, make sure you make it visible first.

Finally let me share that finding out the requirement for 2 HDMI cables between TV and AVR is a stroke of genius, thank you and very well done on sharing that - it is hard to find any documentation on the topic (one that pushes video to the display, and one that carries the ARC audio from TV to AVR, the second of course connected to one end on the ARC labelled HDMI output of the AVR and on the other end to the LG HDMI2 (the only one with ARC/eARC). Seems evident once reading it but hard to figure out from the doc.

Cheers
 

dante01

Distinguished Member
Note that conventional ARC is reliant upon HDMI CEC for its functionality. Don't turn it off onboard the TV or you'll not be able to source audio on the AV receiver via ARC.

Also note that you turn off the auto audio swuitching on the AV receiver then you'd have to manually select the TV source if and when wanting to access audio via ARC. If you leave it on then the AV receiver would automatically switch to that source if and when you start playing something via any of the TV's smart apps. THe downside to this is that the AV receiver will also automatically switch to this source whenever you power it and or the TV up if that setting is left on.

On LG TVs, you'll also see a setting in association with the ARC setting relating to disgital audio output. THis should be set to either AUTO or PASS THROUGH and not PCM. THe former options equate to BITSTREAM while the latter will result in the TV downmixing multichannel formatted audio and outputting it as 2 channel PCM.

You don't need to use the second HDMI output, simply leave the auto switching ON and then add an additional command to your TV box's Harmony activity to select the associate source on the AVR that isassociated with that TV box.


snapshot001-1.jpg





Also worth mentioning that eARC is not dependant upon HDMI CEC so you could turn HDMI CEC off onboard both the TV and the AVR receiver and still use eARC. You'd still however lose the auto switching which is dependant upon CEC.
 

Webbserver

Well-known Member
Note that conventional ARC is reliant upon HDMI CEC for its functionality. Don't turn it off onboard the TV or you'll not be able to source audio on the AV receiver via ARC.

Also note that you turn off the auto audio swuitching on the AV receiver then you'd have to manually select the TV source if and when wanting to access audio via ARC. If you leave it on then the AV receiver would automatically switch to that source if and when you start playing something via any of the TV's smart apps. THe downside to this is that the AV receiver will also automatically switch to this source whenever you power it and or the TV up if that setting is left on.

On LG TVs, you'll also see a setting in association with the ARC setting relating to disgital audio output. THis should be set to either AUTO or PASS THROUGH and not PCM. THe former options equate to BITSTREAM while the latter will result in the TV downmixing multichannel formatted audio and outputting it as 2 channel PCM.

You don't need to use the second HDMI output, simply leave the auto switching ON and then add an additional command to your TV box's Harmony activity to select the associate source on the AVR that isassociated with that TV box.


View attachment 1531693




Also worth mentioning that eARC is not dependant upon HDMI CEC so you could turn HDMI CEC off onboard both the TV and the AVR receiver and still use eARC. You'd still however lose the auto switching which is dependant upon CEC.
This thread refers to a Marntz AVR not Yamaha and a B8 which doesn’t have eARC, so not relevant to your post.
 

dante01

Distinguished Member
I think you'll find that a lot of what I've said isn't specific to Yamaha AVRs or the later LG TV models. The same setup would work with any Yamaha , DEnon or Marantz AVR without you having to use the second HDMI output on the AV receiver.

Some of what I conveyed is there to aid others who may read this topic.

THe Harmiony workaround dates back years and was originally posted to a thread dealing specifically with a Denon AV receiver. This did however pre date the introduction of the TV audio auto switching HDMI setting on DEnon and Marantz models.
 

Webbserver

Well-known Member
I think you'll find that a lot of what I've said isn't specific to Yamaha AVRs or the later LG TV models. The same setup would work with any Yamaha , DEnon or Marantz AVR without you having to use the second HDMI output on the AV receiver.

Some of what I conveyed is there to aid others who may read this topic.

THe Harmiony workaround dates back years and was originally posted to a thread dealing specifically with a Denon AV receiver. This did however pre date the introduction of the TV audio auto switching HDMI setting on DEnon and Marantz models.
You’ve also repeated or ‘conveyed’ as you like to call it, most of what I’ve already said and added nothing to my explanation with reference to the Marantz/LG set up.
I specifically suggested manual switching in favour of auto switching for the reason stated above, but you then have to suggest otherwise and the downside of not doing so - We know, I’ve already mentioned it!

My suggested setup arrangement offers a stable solution, so I’d thank you not to pick holes in it especially when you don’t even own some of the equipment in the setup and therefore can’t speak from experience, but what you’ve read elsewhere.
 

dante01

Distinguished Member
You appear to want to be purposefully antagonistic?

So you didn't omit anything from your post that I conveyed in the post I submitted then?

I'll pick holes in whatever I like thank you :hiya:





And again, if you've a Harmony remote then you can negate the adverse behaviour without need of using the second HDMI output or disabling the auto audio switching. How do I know that? Because I've been doing it before Denon and or Marantz even included an option to turn TV audio auto switching off.

 
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Webbserver

Well-known Member
🥱
 

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