Contributor I

PS4 Pro outputting PCM via LG CX shows Multichannel PCM 7.1 for Sonos Arc, but rear surrounds have no audio

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I have the Arc, Sub, and Sonos 1 in a surround setup, connected to an LG CX via eArc. Previously I had the PS4 outputting Bitstream (Dolby), and Sonos reported Dolby Digital 5.1.

The fix that added LPCM to Sonos Arc recently went live, so I updated PS4 Pro to output PCM, and the HDMI input on the TV to PCM. (The output remained Passthrough). After doing this, the System Status page for Sonos shows Multichannel PCM 7.1.

However, I now get no rear surround audio in games like Assassin’s Creed Valhalla. (It’s not faint, there’s really none.) I get the full surround experience if I change it back to getting Dolby Digital 5.1. On the PS4 Home screen, I do get sound from the rears in PCM 7.1, albeit very faintly, compared to Dolby Digital 5.1.

Does Sonos not downmix the extra channels properly? It’s kinda bad that a higher fidelity signal sounds worse.

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Trending Lyricist I

Fix coming when?

Lyricist III

Fix coming when?

Reportedly the July update.

Based on prior software updates, possibly mid-month on a Tuesday.

Lyricist III

An update rolled out today for app and speakers, no clue what it does though

With no listed release notes, it would just be bug fixes.

Bruce

Lyricist III

From reddit:

PS5 audio under LPCM is now outputted as Dolby digital plus 5.1 . They fixed the low volume when selecting LPCM LINEAR. Great job Sonos!

From reddit:

PS5 audio under LPCM is now outputted as Dolby digital plus 5.1 . They fixed the low volume when selecting LPCM LINEAR. Great job Sonos!

This is not true when playing games on the PS5.

I have no streaming apps installed so I cannot test streaming audio.

My PS5 still sends 5.1 when set to AVR and reducing the channels from 7.1 to 5.1.

When the system is set to "sound bar" it sends the 7.1 LPCM. The surrounds output sound like normal. But no 5.1 downmixing from Sonos yet.

LG settings Digital sound passthrough, eArc On, HDMI output Bitstream. (Setting to PCM gives stereo sound says the Sonos app)

Headliner II

What’s the news on any update to fix this issue?

Was it this month we were potentially getting a update to fix it, I get they like to test things but it seems to be taking for ever.

Lyricist I

Waiting on this update as well. I hate having to turn on/off passthrough to get proper audio output for non atmos content

Sonos Staff

Hi @ledzep1 & @Shadylane

At present, we have no time scale to share, I’m afraid.

"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein

Headliner II

Hi @ledzep1 & @Shadylane

At present, we have no time scale to share, I’m afraid.

Hi

Was this fixed in recent 13.2 update?

Release notes don’t give any useful information, and I have seen a few mention this firmware has sorted the issue, can you confirm please.

Thanks

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