Answered

Need some help connecting my PS5 and LG CX to my Sonos Arc

  • 13 September 2021
  • 8 replies
  • 197 views

I have a Sonos Arc standalone with no other speakers or subs. I am almost tearing my hair out trying to solve the below conundrum for hours now.

My PS5 is connected to the HDMI 3 port on my LG CX. My Sonos Arc is connected to the LG CX through HDMI 2 (eArc port).

On my TV sound settings, I have enabled eArc. Digital sound-out is "pass-through". In HDMI Input Audio format, both HDMI 2 and HDMI 3 are set to PCM.

On my PS5, I have set "AV Amplifier----> 5.1 channel----> SOund output: Linear PCM".

Despite the above setting, the Sonos app is telling me its outputting Multichannel PCM 7.1 indicating I am missing 2 full channels of sound.

How do I fix this? I don't want to change the PS5 output to Dolby and HDMI 3 Input in TV settings to Bitstream as I have heard PCM is better than Dolby for gaming.

Can someone please help with this? What settings should I change to output 5.1 on my sound bar?

icon

Best answer by GuitarSuperstar 13 September 2021, 19:31

The Arc currently has an issue down mixing PCM 7.1 to PCM 5.1. Sonos is aware of this down mixing problem and is currently working on fixing it.

View original

8 replies

Userlevel 7

The Arc currently has an issue down mixing PCM 7.1 to PCM 5.1. Sonos is aware of this down mixing problem and is currently working on fixing it.

The Arc currently has an issue down mixing PCM 7.1 to PCM 5.1. Sonos is aware of this down mixing problem and is currently working on fixing it.

OK so looks like I have to use Dolby to get it working but it seems there are 2 modes within Dolby which are confusing me. In HDMI Input Audio format, I set the PS5 input to bitstream and in the PS5 Audio output to Dolby. Now I have 2 options here. When I set the digital sound output on my TV to Pass-Through, the Sonos indicates its receiving a Dolby Digital 5.1 signal but when I set it to Pass-through, I get a “Dolby Multichannel PCM 5.1” on my Sonos app. Which would be better for gaming?

Userlevel 7

Usually multichannel PCM is the better option, but go with whatever sounds the best to your ears.

I have almost the same setup, but with an LG G1. I have been playing Sekiro on the PS5 with Dolby Digital 5.1 using Passthrough settings, it’s great! But I have 2 rear Sonos Ones as well. Figured I’d at least offer that. I haven’t tried the other route. But agreed with GuitarSuperstar, try them out and go with what works well for you.

Userlevel 3
Badge +3

So what are the suggested settings on both the PS5 and LG CX? 

Does anything need to be changed when playing DTX Blu rays on the PS5?

Recently got a PS5 and noticed the 7.1 downmix issue too. I set my PS5 output to Dolby and C9 input to auto and it sounds ok, no atmos but hopefully this bug fix will resolve that.

Is there a thread for this bug and it’s incoming fix that I could follow? Couldn’t find anything 

Switch both your HDMI 3 and PS5 to Bitstream and your problem should be solved 

Userlevel 3
Badge +3

Recently got a PS5 and noticed the 7.1 downmix issue too. I set my PS5 output to Dolby and C9 input to auto and it sounds ok, no atmos but hopefully this bug fix will resolve that.

Is there a thread for this bug and it’s incoming fix that I could follow? Couldn’t find anything 

There won't ever be Atmos in PS5 games - Sony uses a proprietary audio engine for its games, meaning that LPCM would normally be the correct option for PS5 gaming. However, Sonos is not downmixing the 7.1 track to 5.1 correctly atm, and that's why folks are falling back to Dolby. The PS5 offers Atmos playback in the disk player only, not in games or the media apps (to my knowledge).

Reply