Avid Contributor III

Answered

Multichannel PCM on Arc

328 replies
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Are you really not supporting multichannel PCM on the newly announced Arc?

Why? It’s not a licensing issue this time.

It seems like there is always something missing with your home theater products.

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DitteAnswer

Hi all,

We hear you. With a software update today, Arc now supports multi-channel LPCM, bringing new immersive sound experiences for gaming, Blu-ray discs, and more. To get support for multi-channel LPCM on Arc, download the latest Sonos S2 update from the app store and then update your system in the Sonos S2 app. After updating the app, go to Settings > System > System Updates > Check for Updates.

All the best,

Ditte

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nahumgarcia

Lyricist III

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

If I do what you said and put the LG NanoCell HDMI input in Bitstream, the PS4 automatically changes the output to bitstream. And again, that gives surround sound but with delay

Is your output set to passthrough on the tv?

Yep, I have passthrough selected

N

nahumgarcia

Lyricist III

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

If I do what you said and put the LG NanoCell HDMI input in Bitstream, the PS4 automatically changes the output to bitstream. And again, that gives surround sound but with delay 😞

That's odd. Selecting the HDMI Input on my CX has no effect on what I choose on my PS4. And either way for me it is not changing anything when I switch HDMI Input on the TV from Bitstream to PCM. The only thing that it making it change is the Audio Out on the PS4 itself with Linear PCM giving me Multichannel PCM 7.1 and Bitstream (Dolby) giving me Dolby Digital 5.1. I don’t have any delay issues with DD 5.1 though so I went back to that since something seems wrong with the LPCM sound. Not sure what else you can try. It may be an issue with your specific TV model?

Difficult to know. The TV is new, I bought it 2 weeks ago and it has eARC as stated in LG’s website. So I can’t really know what’s not working. I’ve checked all the TV’s menus to see if there was something wrong but I don’t see anything that could be the problem.

D

Danindub

Trending Lyricist III

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

If I do what you said and put the LG NanoCell HDMI input in Bitstream, the PS4 automatically changes the output to bitstream. And again, that gives surround sound but with delay

Is your output set to passthrough on the tv?

Yep, I have passthrough selected

And is your delay setting in tv and Sonos sync set to 0?

N

nahumgarcia

Lyricist III

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

If I do what you said and put the LG NanoCell HDMI input in Bitstream, the PS4 automatically changes the output to bitstream. And again, that gives surround sound but with delay

Is your output set to passthrough on the tv?

Yep, I have passthrough selected

And is your delay setting in tv and Sonos sync set to 0?

Yep! That’s all correctly set up.

S

starlan

Enthusiast I

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

If I do what you said and put the LG NanoCell HDMI input in Bitstream, the PS4 automatically changes the output to bitstream. And again, that gives surround sound but with delay

That's odd. Selecting the HDMI Input on my CX has no effect on what I choose on my PS4. And either way for me it is not changing anything when I switch HDMI Input on the TV from Bitstream to PCM. The only thing that it making it change is the Audio Out on the PS4 itself with Linear PCM giving me Multichannel PCM 7.1 and Bitstream (Dolby) giving me Dolby Digital 5.1. I don’t have any delay issues with DD 5.1 though so I went back to that since something seems wrong with the LPCM sound. Not sure what else you can try. It may be an issue with your specific TV model?

Difficult to know. The TV is new, I bought it 2 weeks ago and it has eARC as stated in LG’s website. So I can’t really know what’s not working. I’ve checked all the TV’s menus to see if there was something wrong but I don’t see anything that could be the problem.

Over on AVSForum someone just posted that there are issues with the eARC on the CX (which is also a 2020 model year TV) and LPCM so it may be the TV that is the culprit for my problem. The C9 had the same problem and a firmware update apparently fixed it.Hopefully a firmware update from LG will fix it on the CX as well. Could be the same for yours?

D

DuranDoranMartell

Avid Contributor III

Intriguing news!

Doesn't the Arc automatically update?

I seemed to think the audio textures improved a couple days ago but thought it was just the program I was watching.

N

nahumgarcia

Lyricist III

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

If I do what you said and put the LG NanoCell HDMI input in Bitstream, the PS4 automatically changes the output to bitstream. And again, that gives surround sound but with delay

That's odd. Selecting the HDMI Input on my CX has no effect on what I choose on my PS4. And either way for me it is not changing anything when I switch HDMI Input on the TV from Bitstream to PCM. The only thing that it making it change is the Audio Out on the PS4 itself with Linear PCM giving me Multichannel PCM 7.1 and Bitstream (Dolby) giving me Dolby Digital 5.1. I don’t have any delay issues with DD 5.1 though so I went back to that since something seems wrong with the LPCM sound. Not sure what else you can try. It may be an issue with your specific TV model?

Difficult to know. The TV is new, I bought it 2 weeks ago and it has eARC as stated in LG’s website. So I can’t really know what’s not working. I’ve checked all the TV’s menus to see if there was something wrong but I don’t see anything that could be the problem.

Over on AVSForum someone just posted that there are issues with the eARC on the CX (which is also a 2020 model year TV) and LPCM so it may be the TV that is the culprit for my problem. The C9 had the same problem and a firmware update apparently fixed it.Hopefully a firmware update from LG will fix it on the CX as well. Could be the same for yours?

No idea, I can’t find anything on Google. I’ve written LG support, let’s see what I can find out (in case they answer).

N

Naekyr

Enthusiast II

This is how I’ve got it setup:

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

Sonos app reports in getting Multichannel PCM 7.1. However it sounds off. Surround and certain environmental effects are very quiet but certain other sounds like dialogue or gunfire in a game right in front from center channel is very loud. It’s almost like it is missing certain channels or something. I’ve gone back to DD 5.1 which sounds great. Change PS4 output to Bitsream (Dolby) to get DD 5.1 which sounds much better balanced to me with the surround effect.

I don’t know if it’s a bug but yes I’ve seen that some stuff defaults to 7.1 even though Sonos is only 5.1 or 5.1.2

The nintendo switch asks me would i like 5.1 or 7.1 after I select LPCM, hopefully the PS4 does too?

I haven’t fullky tested mine, but I would not be surprised if 7.1 sounded wrong, because two of the channel are missing. I would think that the ARC should only allow 5.1 with LPCM, but for some reason the EDID data reported back allows all LPCM channels so 7.1 becomes available even though the Sonos system doesn’t have that many channels

Or maybe Sonos is allowing 7.1 because secretly they are planning to let us add another 2 sonos speakers into the surround setup for full 7.1? That would be awesome!

mdwhitaker

Contributor II

Such good news about the update!! I’ve held off buying some 4K discs that have the DTS format, until this came - after the disappointment of finding the dark Knight trilogy was in DTS-HD and limited to stereo 2.0 with the current situation.

Sounds so good now on my Arc + Sub + ONE SL surrounds now with the update!

N

Naekyr

Enthusiast II

This is how I’ve got it setup:

LG CX: HDMI in Bitstream (I tried PCM too, makes no difference since the passthrough on the audio out may make this selection irrelevant anyways?). EARC on. Audio Out passthrough.

PS4: HDMI audio. Linear PCM.

Sonos app reports in getting Multichannel PCM 7.1. However it sounds off. Surround and certain environmental effects are very quiet but certain other sounds like dialogue or gunfire in a game right in front from center channel is very loud. It’s almost like it is missing certain channels or something. I’ve gone back to DD 5.1 which sounds great. Change PS4 output to Bitsream (Dolby) to get DD 5.1 which sounds much better balanced to me with the surround effect.

I don’t know if it’s a bug but yes I’ve seen that some stuff defaults to 7.1 even though Sonos is only 5.1 or 5.1.2

The nintendo switch asks me would i like 5.1 or 7.1 after I select LPCM, hopefully the PS4 does too?

I haven’t fullky tested mine, but I would not be surprised if 7.1 sounded wrong, because two of the channel are missing. I would think that the ARC should only allow 5.1 with LPCM, but for some reason the EDID data reported back allows all LPCM channels so 7.1 becomes available even though the Sonos system doesn’t have that many channels

Or maybe Sonos is allowing 7.1 because secretly they are planning to let us add another 2 sonos speakers into the surround setup for full 7.1? That would be awesome!

That’s a negative on the PS5 sadly. If I select LPCM the PS5 will default to 7.1 and will not let me change the channel layout, it’s either Dolby Digital 5.1 or 7.1 LPCM

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