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?
Best answer by GuitarSuperstar
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.