ARC intermittent connection loss possibly with Atmos only

Never would I have thought this would be such a nightmare.  And dont get me started on the issues I have with Alexa… @Ken_Griffiths and I uncovered that madness a month or so ago ha.

Do you see any lip sync issues with PCM as your setting?  I did notice quite a bit of it the other night when watching a movie on Amazon Prime Video.  Usually I can deal with it but it was a big lag and only see it with Amazon Prime so far.  Maybe this PCM setting will fix that?  again, no idea just thinking out loud.

So far my video hasnt kicked out with this setting (PCM) so hoping for the best ha.  Still doesnt help answer the issue with Atmos content itself but its a start.  Ill let Amazon keep troubleshooting that on their end.

Thanks again guys

A PCM audio setting should get rid of any lip-sync issues. as it’s the default stereo output for all TV’s and is recommended if the TV is old and it’s processor slow and cannot ‘pass-through’ the audio.

Personally, in those type of cases, I would recommend the user opts to use an audio-extractor instead and bypass the TV altogether. There are three common extractors mentioned in the community here for those that have lip-sync issues due to the reasons mentioned, the extractors are:

HDFury Arcana

https://www.hdfury.uk/product/hdfury-arcana/

Feintech VAX04101A

https://feintech.eu/en/collections/hdmi-topseller/products/feintech-vax04101-hdmi-earc-pass-switch-4x1-for-soundbar

OREI HDA-931 or OREI HDA-935

https://www.orei.com/products/dual-hdmi-earc-audio-extractor-converter-4k-60hz-18g-hdmi-2-0-arc-support-hda-931

Let me know if it kicks the bucket, If it does and its NOT passing through Atmos then give it another try cuz I've had zero issues so far (besides the Apple TV+ one from last night, this could be an outlier) *Knocking on Wood*. Sometimes I feel like there might be just the SLIGHTEST amount of lip sync lag but mostly it's not an issue, if it is then its so small that my brain compensates. Cheers! @RaultTN 

I've been eyeing the HD Fury Arcana for a few weeks. Do you have a favorite out of the 3? Thanks!

I have the Feintech VAX04101A connected to a Beam in the Dining Room - I chose it because it is a combined extractor/HDMI switch - whereas the Arcana would require a separate additional switch. It was also cheaper than Arcana …and at the time of purchase the OREI device did not exist.

I can only add the VAX04101A can be difficult to get hold of in some countries, but it is extremely well built and works well for me and does the job fine.👍 I just can’t comment on the other two as I’ve not used either of them, but other users say they each ‘work well’ too.

Just to also clarify the 2019 LG C9 ‘Living Room’ TV is directly connected to my Arc, I don’t use an audio extractor with that TV. (just thought I should mention that here). 

It has NOT kicked me out.  So this has fixed that piece for sure.  I have not yet tried to change the setting to Best Available to see if I get Atmos, and if it kicks me out, but I am at least getting one step closer ha.

Ill report back once I test out Best Available and see how goes.

@Ken_Griffiths @ThatOneDude  So this is interesting. When I change the firestick to Best Available (now having the firestick set to PCM) the audio output through the Sonos app is only “Stereo PCM” so that’s no bueno. 
 

Something else to note. So now having PCM as hdmi1 (firestick), Disney+ only produces DD+ 5.1 which is fine, however I just checked Amazon Prime and started a show and it streamed Atmos regardless of the DD+ setting on firestick. Although I understand that DD+ brings with it Atmos. So it must be something between how Amazon Prime and Disney+ code Atmos maybe?  I have no idea but my brain is melting. 
 

Now to check and see if Amazon Prime (Atmos) kicks me out with PCM and DD* as the default. yay. 

Morning guys.  Back at the troubleshooting today ha.  So I think this is what you eluded to yesterday @ThatOneDude  but now that I have my tv set to PCM and the Firestick set to DD+ I noticed that when playing Jack Ryan (Amazon Prime) it was forcing it to play Atmos (I assume because Atmos is a part of DD+).  When I play an Atmos movie on Disney, it only comes through as DD+ 5.0 with those same settings.  So something is different on how Amazon and Disney stream Atmos I feel?  Either way I did notice zero lip sync issues since switching to PCM (thank the lord ha). 

However while watching Jack Ryan last night (DD+ Atmos) it lost signal again as I expected.  Amazon has a setting that I can change from Atmos to DD+ which I did and it STILL CUTOUT when it showed DD+ 5.1 through the Sonos App.  So that is a new curveball?  May be somthing specific to how Amazon Prime streams DD+ content??

It is especially strange since you @Ken_Griffiths have the same setup with a Firestick (with network adaptor) and Sonos setup as I do.  I believe you also have the same model year tv (2019 LG) but I feel you have a higher end model (mine is pretty basic from my understanding).  Its also strange because you have your input set to Bitstream and mine acts differently in that setting.  

I just cant narrow down if the glitch is happening because of how the Firestick interacts with the TV, or if it is something directly related to the Firestick internally and the bandwidth needed to pull Atmos content.  

No show from Amazon yesterday after telling me they would call me back.  Classic ha.  Have a good one gentlemen, if you think of anything, give me a shout.  I am tempted to fully reboot my tv but god bless do I really want to deal with the settings again ha.  @ThatOneDude Have you attempted that yet on your TV while messing with yours?

@Ken_Griffiths  I finally caught it in the act.  I see I can’t add a video here, if I emailed to you do you think you may be able to take a look to see if you can tell what is happening?  It’s just a quick 23 second video  If so, let me know your email  thank you sir