Sonos Arc TV sound drops off

Hey Babaee, try Oriboaz settings change for your TV. I updated mine yesterday and will report back if this stops or doesn’t the sound drop offs. Definitely worth a try. Mine was intermittent and not regular, but perhaps twice a week which was getting annoying. Cheers 

Hi Stuied, I appreciate it if you can let me know.    So far I’ve turned eARC to auto on my TV and set digital audio out to PCM.  If this doesn’t fix the issue I’ll try your method.

Unfortunately oriboaz suggestion does not work the sound has still dropped off. As such there is still no solution, Sonos and Sony remain quiet. Pretty expensive bit of kit to actually not work every time all the time, definitely a Sonos first for me (long time Sonos fan!) . Thanks Oriboaz it’s good to get any option to try and resolve.

I had this issue since the arc was launched. its gonna need a firmware update as nothing else can fix it. at first I thought it was Sony's fault but looking through the posts on here it seems a lot of other TV brands have the same issue, but at least Sonos are now looking into it hopefully we get a fix soon.

It is actually my first Sonos and I’m disappointed.  I switched from Bose.  So here is what I tried and is working so far.  Go to your TV’s audio setting.  Turn eARC to Auto and switch digital audio output to PCM.  Mine dropped every couple of hours and ever since I made these changes I haven’t had any drops.

tried all settings some reduce the issue but the sound drop still happens and I also refuse to spend £800 on an Atmos sound bar to run it in pcm 

Ian101181I understand.  Sonos arc has Atmos capabilities .

It is so random for me, I love the sound quality so will put up with it for now. I agree for the price this should acknowledge and a fix incorporated ASAP.

These drop offs of sound:

1. does the sound come back immediately, or is it silent until you do some action? 
2. Do you know if they happen for all sound formats, or only for Dolby Digital Plus? 
3. Do you use the stock HDMI cable?

I have a Sony TV, without eArc. All my sound is via Apple TV 4k, which outputs Dolby Digital 5.1 (not plus). With the stock cable, sometimes the sound will partially drop off for a split second (it will become weaker, but not completely silent), and them come back immediately. I replaced the stock cable with a different HDMI cable (thicker), which improved things immensely. Since replacing the cable, in about two weeks I had this split-second drop off occur only twice. Now, it should not happen at all, but at least now it’s infrequent enough that I can live with it for a while. 
Now, you may think that an HDMI cable does not matter, but it can. The digital data going through it is encoded, and the receiving device needs to decode it. If the cable isn’t properly shielded, there may be interference that can cause problems. 

Hi Oriboaz, the sound stays off until i actually pull the plug out, just turning the tv does not work. I am only trying atmos plugged into the earc setting on my tv and using the cable provided by Sonos. The arc is wall mounted cables through the wall. To be honest it’s a pain putting new cables through the wall so would rather not even try a new cable. We should not have too if it’s the one provided. Cheers stuied