Trending Lyricist I

LG C9 and Sonos Arc

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Hey all, my Arc was delivered this morning and I've had a chance to hook it up to my LG C9 directly via eARC and ran a few tests regarding Atmos and other features.

Built in apps:

Netflix - Reporting Dolby Atmos (DD+) for Atmos content.
Disney+ - Reporting Dolby Digital Plus 5.1 (though this is likely due to the current throttling taking place in the EU)
Amazon Prime - Reporting Dolby Atmos (DD+) for Atmos content.

Xbox One:

HDMI Audio set to Bitstream out and Bistream Format set to Dolby Atmos has no delay, finally! Displays Dolby Atmos in Sonos app.

PS4:

Like with the Xbox, there's no delay on Bitstream HDMI audio

NVidia Shield Pro:

Netflix - Reporting Dolby Atmos (DD+) for Atmos content.
Amazon Prime - Reporting Dolby Atmos (DD+) for Atmos content.
Disney+ - Reporting Dolby Digital Plus 5.1 (though this is likely due to the current throttling taking place in the EU). After connecting up to a US VPN it's reporting Dolby Atmos (DD+) for Atmos content.
PLEX - This is where it gets slightly annoying. Playing TrueHD content it reports Stereo 2.0. Setting Passthrough to HDMI reports Dolby Atmos (TrueHD). For DTS content you need to switch the Passthrough setting to Optical which in turn causes TrueHD to playback in Dolby Digital Plus 5.1.

Apple TV:

iTunes Content - Reports Dolby Atmos for Atmos content. Non Atmos content reports Stereo 2.0. With Change Format > On and New Format > Dolby Digital 5.1, I receive Dolby Digital 5.1 from non-Atmos iTunes content. I ran this test using Beetlejuice and Avengers Assemble.
Netflix - Reports Dolby Atmos for Atmos content.
Amazon Prime - Reports Dolby Atmos for Atmos content.
Disney+ - Reporting Stereo 2.0 for all content bizarrely. Setting audio output on the Apple TV to Dolby 5.1 allows all content to playback in 5.1 rather than stereo.

My C9 is running firmware 04.80.03 with the following settings:

Sound Out

HDMI ARC selected

Digital Sound Out set to Passthrough

eARC set to ON

Additional Settings

DTV Audio Setting set to Auto

HDMI Input Audio Format set to Bitstream.

If there's anything else I can test or any questions, let me know!

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C

Coxy

Lyricist III

Hi,

Can you possibly share a pic of how your Arc looks in front of the C9? I want to get one but am conscious of the fact it will sit pretty high compared to the low-profile C9 stand… does it look odd at all?

It definitely cuts off a couple of inches on my 65C9. I bought a riser off of AmazonUK but I’ve seen a few people buy Ikea Lack shelves which is a pretty cheap way of doing it.

As I feared… I have no idea why LG made the stand so low-profile when a great many of the people buying OLEDs are going to be pairing them with sound-bars!

Would you mind sharing a link to the riser you purchased?

They look great on they’re own but yeah really impractical if you want a soundbar.
I bought this one: https://www.amazon.co.uk/dp/B07C97Z42N/ref=cm_sw_r_cp_api_i_SgK6EbBD8FM29

Small caveats, the stand does overhang by half an inch either side at the front, but most of the weight is in the back of the stand so I didn’t find it a problem. It feels really wobbly on the riser, but the stand doesn’t wobble, just the flimsy OLED panel. A bit worrying but I don’t think it would actually be an issue.

L

LenardH

Lyricist II

I've go an lg b9 and when I play something that is Atmos it shows on the tv as playing Dolby vision and then in the sonos app it shows dd+ I don't think that is Dolby Atmos is it?. If I unplug the arc and play the same Netflix prog through the tv speakers it says Dolby vision and underneath Dolby atmos

Atmos is audio format and Dolby Vision is picture quality, they operate independent or together depending on the content….

W

Wolf

Enthusiast I

All working well with LG C9 and Arc...TV is a prompting me to Upgrade firmware to 04.80.03. Am I right in saying I should avoid doing this until Sonos patch in multi LPCM support, Apple TV currently outputs Atmosand 5.1 with no issues

L

LenardH

Lyricist II

All working well with LG C9 and Arc...TV is a prompting me to Upgrade firmware to 04.80.03. Am I right in saying I should avoid doing this until Sonos patch in multi LPCM support, Apple TV currently outputs Atmosand 5.1 with no issues

I set my LG C9 to not update automatically. Will keep it like that because sometimes these updates break other things and I rather wait until I read how others are making out with the update. Its seems as thou 04.80.03 is a problem for Apple TV 4K, my primary viewing device. So on that note I am still waiting on a confirmed answer before updating. As of right now with the current firmware I have everything is working great I don't want to mess it up...enjoying every thing, LG C9, Apple TV 4K and the Sonos Arc and ATMOS content…..

W

Wolf

Enthusiast I

All working well with LG C9 and Arc...TV is a prompting me to Upgrade firmware to 04.80.03. Am I right in saying I should avoid doing this until Sonos patch in multi LPCM support, Apple TV currently outputs Atmosand 5.1 with no issues

I set my LG C9 to not update automatically. Will keep it like that because sometimes these updates break other things and I rather wait until I read how others are making out with the update. Its seems as thou 04.80.03 is a problem for Apple TV 4K, my primary viewing device. So on that note I am still waiting on a confirmed answer before updating. As of right now with the current firmware I have everything is working great I don't want to mess it up...enjoying every thing, LG C9, Apple TV 4K and the Sonos Arc and ATMOS content…..

Cheers - no firmware update for me then :-)

D

dP89

Lyricist III

I was able to setup everything and Atmos from e.g. Netflix (6 Underground) is working perfectly.

However, I was not able to get TrueHD working so far. I tried it via Apple TV 4K Using Infuse but it of course transcodes it to Dolby Digital 5.1, same thing for PLEX.

The next thing I will try is to connect via DLNP to my NAS Server. I really don’t know is this a LG, Sonos or PLEX issue?

Anyone else who could stream True HD?

Another question, is there a big difference between Dolby Digital 5.1 and TrueHD?

C

Coxy

Lyricist III

I was able to setup everything and Atmos from e.g. Netflix (6 Underground) is working perfectly.

However, I was not able to get TrueHD working so far. I tried it via Apple TV 4K Using Infuse but it of course transcodes it to Dolby Digital 5.1, same thing for PLEX.

The next thing I will try is to connect via DLNP to my NAS Server. I really don’t know is this a LG, Sonos or PLEX issue?

Anyone else who could stream True HD?

Another question, is there a big difference between Dolby Digital 5.1 and TrueHD?

To get trueHD you need an external source connected to the tv via earc. Apple TV doesn’t support trueHD unfortunately. You’d need a Blu-ray player or something like an nvidia shield.
the internal apps also don’t support TrueHD.

The difference between them is that trueHD is lossless, so the audio is transmitted as is to the soundbar.
dolby digital plus is lossy, compressed audio to reduce the bitrate.
there is a certainly a difference between the codecs, but it might not be enough of a difference for most people to worry about it.

D

dP89

Lyricist III

I was able to setup everything and Atmos from e.g. Netflix (6 Underground) is working perfectly.

However, I was not able to get TrueHD working so far. I tried it via Apple TV 4K Using Infuse but it of course transcodes it to Dolby Digital 5.1, same thing for PLEX.

The next thing I will try is to connect via DLNP to my NAS Server. I really don’t know is this a LG, Sonos or PLEX issue?

Anyone else who could stream True HD?

Another question, is there a big difference between Dolby Digital 5.1 and TrueHD?

To get trueHD you need an external source connected to the tv via earc. Apple TV doesn’t support trueHD unfortunately. You’d need a Blu-ray player or something like an nvidia shield.
the internal apps also don’t support TrueHD.

The difference between them is that trueHD is lossless, so the audio is transmitted as is to the soundbar.
dolby digital plus is lossy, compressed audio to reduce the bitrate.

Ok, so I just added an external USB Drive to my C9 and tried to play it via the internal media player from the TV, but again “audio format not supported”

This is quite disappointing.

Therefore, unless I buy something like a nvidia shield which is supporting trueHD, I will not get it correct?

Or can this be added at a later stage?

BTW: I assume the Arc is supporting TrueHD?

C

Coxy

Lyricist III

I was able to setup everything and Atmos from e.g. Netflix (6 Underground) is working perfectly.

However, I was not able to get TrueHD working so far. I tried it via Apple TV 4K Using Infuse but it of course transcodes it to Dolby Digital 5.1, same thing for PLEX.

The next thing I will try is to connect via DLNP to my NAS Server. I really don’t know is this a LG, Sonos or PLEX issue?

Anyone else who could stream True HD?

Another question, is there a big difference between Dolby Digital 5.1 and TrueHD?

To get trueHD you need an external source connected to the tv via earc. Apple TV doesn’t support trueHD unfortunately. You’d need a Blu-ray player or something like an nvidia shield.
the internal apps also don’t support TrueHD.

The difference between them is that trueHD is lossless, so the audio is transmitted as is to the soundbar.
dolby digital plus is lossy, compressed audio to reduce the bitrate.

Ok, so I just added an external USB Drive to my C9 and tried to play it via the internal media player from the TV, but again “audio format not supported”

This is quite disappointing.

Therefore, unless I buy something like a nvidia shield which is supporting trueHD, I will not get it correct?

Or can this be added at a later stage?

BTW: I assume the Arc is supporting TrueHD?

That’s right, you’d need an external player. I’ve not seen any information about LG being able to support TrueHD from its internal apps, I think I recall seeing it being a limitation of WebOS so I wouldn’t hold out hope on support coming. LG are notorious for not supporting their TVs for very long so it would likely be on a later model if at all.

The Arc does support TrueHD yeah, I use an nvidia shield to pass through my media files on Plex and get TrueHD that way.

B

bas_nl

Lyricist I

So im running the atmos on earc and I have a shield pro (newest model) on another hdmi slot and I play a true HD source on plex (blueray movie or Dolby atmos test file). Somehow the best audio I get is Dolby digital plus 7.1 and plex tell me atmos is not supported on thisdevice. What am I doing wrong to get atmos playing?

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