Sonos ARC + LG TV (eARC)

Hi @tangle,

If you’ve followed the steps in this topic and have already spoken with LG, then I’d suggest submitting a diagnostics after the issue occurs then reaching out to our support team to troubleshoot the issue.

You may be right with there being a conflict between Apple TV and the Arc, but it’s strange that it was working fine previously as you said, perhaps a firmware update has changed your TV settings?

I wouldn’t recommend using a splitter to go from the Apple TV to the Arc directly. It’s better to have the Arc connected to the eARC/ARC port on the TV. 

I hope this information helps!

Hello @Jamie A 

Following your comments, did several test and issues at the moment is the eARC, without it only using ARC. The problem disappears, cec enabled on all devices.

Been test for almost 4 days, can you explain me the difference in sound for the Sonos ARC with/without the eARC?

thanks in advance for your help 

Hi @Anonymous,

The main difference between ARC and eARC on Sonos would be that eARC supports uncompressed Dolby Atmos (Dolby TrueHD), while ARC doesn’t and supports compressed Dolby Atmos.

Generally, if you’re using streaming services, you aren’t going to notice a difference.

Looking into the specs of your TV (LG 65NANO886), it does support eARC, so I’m not sure why you aren’t able to use it. Again I’d suggest reaching out to LG for more information and troubleshooting if you want to have eARC turned on, as it seems your issue is linked to this specific TV.

I had this problem with my LG55SK9000PUA (2018 model) connected to a Sonos Beam (Gen 2) with HDMI ARC for the 6 months I’ve owned the Beam. I estimate about 25% of the time turning on the TV it appeared to attempt to connect the sound to the Beam but would “fail back” to the TV speaker. Manually changing the TVs Sound back to HDMI ARC would work from that point. … LG updates the TVs software frequently, and it does seem that a recent update may have fixed the issue as the TV has been consistently turning on connected to the Beam for the past few weeks.

Hello @twrva 

What is the software version you have? Since I already on the current version and the issues are a constant dilemma exactly as what you described.

@Jamie A Im able to toogle on/off the earc but with it ON, the issue is unbearable… with it OFF, it disappeared.. is a thing between the earc of the tv and the sonos arc.
 

In what specific cases the eARC would be a benefit? Since turning it off is just a patchwork.

This happened to me too. Everything was working and connected with arc hdmi on my LG tv then all of sudden it stopped working. 
 

I was able to resolve my unplugging the ARC from the power and waited a minute. Plugged it back in and it worked. 
 

When in doubt always unplug it from the powere and reboot. Hope this helps!!

Hello!!!

Yes, that trick works most of the time!! What I found is the eARC between the LG and Sonos has sync issues and by turning off only the eARC and keep the ARC connection works flawlessly. Hope this also helps!

For me the lip sync problems (with the 2018 model LG and Sonos Beam) always got progressively worse (i.e. as the devices remained on without a restart) using HDMI (ARC or eARC) with bitstream or passthrough audio selected (in order to get Dolby Digital 5.1). If PCM audio was selected, lip sync was not a problem. … I ended up replacing the 2018 LG with a LG 2021 model, which solved this and other problems such as disconnecting a Bluetooth headset always reverting to internal speaker rather than the selected audio out.

Dealing with this issue now.

LG webOS TV NANO85APA

Sonos Beam 2

Periodically the beam goes mute.  Sometimes I can unplug everything and then wait 5 minutes. Once I reconnect, it usually all works.  However it is not working and can't figure out how best to resolve.  Currently using my Bose wifi/Bluetooth speaker. 

Help please 

Follow up regarding my issue, I decided to swap out my hdmi cable with my blu-ray player and instantly it started working.  Hard to believe but it's working fine now.