Multichannel PCM on Arc

Actually, can anyone help? I just got a Sonos Arc. I have a TV with eARC. What’s the best settings? When on PS4 using Bitstream (Dolby), I get audio sync issues. My TV audio is set to “auto” not PCM or passthrough. Is this something that multichannel LPCM will fix eventually?

Set the TV audio to passthrough and leave the PS4 using bitstream .. it should then be fine.

Ah. Thanks! I did originally have it set like that but live chatted with Sonos and they said set the tv to “auto”. Not sure why… will passthrough give me 5.1/Atmos etc? 

Passthrough just means that .. the TV will let the audio passthrough the ports without trying to transcode it.. the ARC will get the audio, exactly as sent by the originating device and will play whatever it sends, as long as it’s supported by the Arc.

You can see what the input audio is, by going to the Sonos App ‘Settings/System/About my Sonos’ and find your Arc in the device list. You should see "Audio In" and next to that will be the audio it’s currently receiving/playing.
 

TV Passthrough is usually best as there are no interruptions to the audio… you only need use Auto if you want the TV to try to transcode the signal. Go for that option if you don’t hear any audio but that’s highly unlikely these days.

There are some issues with Apple TV4K sending multichannel LPCM audio, but Sonos say they are going to support that codec, but for now if using a multichannel LPCM source, just switch the originating device to send Dolby Digital 5.1 etc; until the Arc update is in place and it supports that codec.

Hope that assists.

I’m guessing with the layoffs due to the pandemic LPCM will take longer.  I’m still not clear what LPCM will do for Apple TV owners.  That’s my only source of content.  My Sony X930E does provide atmos through Arc with the built in Prime app but not the Apple TV prime app.  Can anyone explain what LPCM will provide us with Apple TV?

I’m not aware of there being any mention of Sonos laying off staff? They’ve actually had a backlog of orders to process recently so I doubt that they’re having cashflow issues requiring layoffs. 

In any case - it looks like the latest app/firmware release yesterday (12.0.5) didn’t contain this LPCM support (as one would expect I suppose but just to confirm!) 

I don’t know how you could have missed the Sonos layoffs.  It’s been all over the news for a while.  The main moderator of these forums was let go.  There is a pandemic on.  No direct sales can compensate for the loss of all the retail. Their financials are available too since they are a public company and it’s not good.

Google Sonos layoffs then Sonos revenues.

Fair enough - I’ve just done that and as you say I’ve found multiple articles confirming that. Must have missed that news somehow - I have been following the news less of late due to the levels of gloom to contend with to be fair. 

Hi,

Apparently still no LPCM support yet …

I am on the market to buy a TV, and I wanted to have a Sonos Arc to get some Atmos action.

Unfortunately, my streaming device is an ATV 4K, and I refuse to use the TV apps to stream (adds and  I do not trust TV OSs with the security of my network) so I am on hold for now on my purchase.

I will wait for Sonos to release the update bringing the LPCM support before buying.

Unless we have a TV that is capable to transfer the Atmos sound to the Arc without lipsync issues… After reading some threads in here and on Apple forum, I have not yet identified this “magical” TV…

Any advice from the community?

Thks

Valyno

+1 for another customer with Sonos ARC + AppleTV + LG 2020 nanocell TV and no Dolby Atmos sounds.