Sonos Arc lip sync issues.

Ok so let me get this straight this a premium soundbar that cost $1000 has audio delay issues and no 2.1 HDMI pass through on the soundbar?! What idiot thought that would be great idea? I was going to pick this up, but not now, I also smell a class action law suit because the product is obviously broken and cost is premium and maybe you can get away without the 2.1 HDMI pass through, but those audio sync issues are a problem and at that price Sonos is basically stealing people’s money for a broken product this just absolutely disgusting business practices.

Just out of interest, those of you who have upgraded from another Sonos product to the ARC and then suffered lip-sync issues, what was the other product, did it work without lip sync and what was the sound like compared to the ARC please?

I have the same issues. I have written to my retailer to kick off a support query, but, I want to be ready to send the ARC back and swap to a previous Sonos product, hence the questions above.

Thanks, Dave

I am also having the same issue with my brand new Sonos Arc and new Sony Bravia XH90 TV. It is really upsetting having spent so much money and then to have these lip sync issues. In TV Apps work fine but there is a noticeable lag when watching from my Virgin box.  I would not have cashed out on a Sonos setup had I known this issue was going to occur. Also frustrating that older Sonos products will not work on the new S2 App. Seems like a money making exercise to me.

As others have mentioned, the HD Fury Arcana is being mooted as the solution, allowing external devices such as SKY/VM boxes to bypass the TV and direct sound straight to the soundbar. I really think that Sonos need to release a similar device free of charge to us.

Since my last post on this i have carried out some testing on mine.

i have a Sky Q box, Sony XF90 and the Arc.

All my apps on the TV work fine without any sync issues, as does my Panasonic BD player.

I removed everything on the TV that looked like it was processing the Audio, I managed to get some gains.

BUT, one of the tests I did was play the Sky box into the TV and use the TV speakers. Guess what, the lip sync was there at that point. 

So, my problem is not the ARC per se, but, the issue has already started before the ARC. I cannot use the optical out on the Sky box as I have other inputs I use on the TV and I am not going to swap wires every time I want to watch something different.

The solution here in my mind was very simple. Why can't these devices (Sky, TV, ARC) have a +/- on their li sync setting. That was the users have the ultimate way of dialling out the issues on their systems. Also, get the ARC to have multiple inputs and use the ARC as a traditional “switching unit” like a true AV receiver. To me it all seems simple.

Some TV manufacturers have resolved these issues by allowing ‘pass-through’ on the HDMI/Optical ports and so the connection passes to the Receiver without any processing or interruption from the TV - a bit like bypassing the TV with an audio splitter. 

^ Thanks, I had heard something about this pass through. I have checked the XF90 and cannot see this as an option on my TV within the menu structure.

I understand LG use ‘pass-through’ and they also have a lip-sync adjustment feature within the settings on some of their latest TV’s: 

https://www.lg.com/ca_en/support/product-help/CT20098005-1399374324873

Hi there,

I’m also having issues with the lip sync lag. I just purchased the Sonos Arc to create a home cinema in combination with the LG Largo Cinembeam (with ARC HDMI input). Loving this projector, by the way.

Ok, so - I am using the Sonos Arc HDMI cable supplied. I purchased the Sonos Arc for the Atmos capability, so I’m bummed that the only options after reading the threads seem to be:
1) Use an Optical cable and then not make use of Atmos, which is a major characteristic of this soundbar, 
2) Live with the annoying sync lag,
3) Send the object back,
4) While it’s a workaround, I don’t think it’s acceptable for Sonos Arc users to throw another 200 euros on a third party product switch/splitter to fix this issue/potential flauw. Adding the extra device undermines the intended simplicity of the object, as the big draw is to have a simulated surround experience in one clean beautiful object.

I’ve had a Sonos Playbar for many years and that works perfectly for my Samsung TV.

Sonos: will there be a firmware update to occur to fix this shortly - shortly being the 30 day return period? If the issue is inherent to the Sonos Arc, then it would be logical for Sonos to fix this issue of their top-of-the-line Soundbar.

I just can’t see how Sonos can fix a delay in receiving the processed audio - the Arc plays it as soon as it arrives, with virtually little or no buffering involved and no transcoding. The issue is what is happening to the audio before it arrives at the Arc that is causing the delays and lip-sync issues.

The HDFury Arcana, or other audio extractor/pass-through devices, are often there to bypass some TV’s that cannot either handle or process the required audio quickly enough through its ports… so this is not actually a Sonos Arc issue, it’s the sending device, or a device situated enroute to the Receiver …  a good many TV’s work okay, so that in itself perhaps shows where the issues really lie here.  

I am with Ken on this. The issue for me happened before it even got the the Sonos Arc. I still think the ability to have a negative and positive sync adjustment is the simple way forward.