Audio Drop issues with Sonos Arc, Samsung Q79A and Apple TV 4K (2021)

  • 14 September 2021
  • 5 replies
  • 29 views

I have the latest Apple TV 4K (2nd generation) and a new 2021 65” Samsung Q70A tv and a Sonos ARC paired with two Sonos one SL’s.  When using the native apps on the Samsung TV everything work great.  I get Dolby Atmos sound with the apps that support is and the sound is fantastic.  When I use the Apple TV 4K, I consistently have issues with the audio dropping.  We use the DirecTV Stream app the most, and the problem occurs there a lot.  This was also the case when it was AT&T TV.  When starting the app, sometimes there is no audio and if we keep changing channels, it eventually will work, but then stop again sporadically.  Also sometime the sound works fine at startup, but will drop when changing channels.  All devices are up to date with firmware and I have tried every combination of settings and recommendations from Sonos, Samsung and Apple forums.  Does anyone have this same setup (or similar) and have a solution?


5 replies

The Sonos Arc can only play the audio when it receives it - I suspect something is holding it up en-route from the Apple TV. The first thing I would perhaps try, is powering off all devices (not standby) and keep everything off for a couple of minutes to ‘drain’ the circuitry, check cable connections and power all back on again, starting with the TV, let things settle and see if that solves the issue.

As a side note, I have an HD Fury Arcana on the way, which I am confident will fix the issue by bypassing the TV for audio, but it shouldn’t be needed as eARC was supposed to make all of this work…

As a side note, I have an HD Fury Arcana on the way, which I am confident will fix the issue by bypassing the TV for audio, but it shouldn’t be needed as eARC was supposed to make all of this work…

Yes, I agree, but that relates to the connection between the Arc and your TV/built-in Apps, which I think you mentioned do work okay. - The issue seems to point towards something between the Apps on the ATV 4K and the pass-through of the audio via the TV regular HDMI ports to its eARC port.

Maybe the TV is set to ‘auto’ for its digital-sound-out and is trying to ‘process’ the data en-route to the Arc. If the TV port (settings) have an option to pass-through the audio instead of ‘Auto’, I would select that option instead, if available, as such a ‘by-pass’ of the audio may greatly improve the delivery of the audio stream to the Arc.

The Arcana passes-through the audio stream received in the same way by by-passing the TV ports.

Based on the dozens of threads on here and other forums where people have very similar issues with Samsung TV’s in this setup, I believe the problem lies somewhere in the TV.  I have tried every combination of settings on the TV, and yes it is set to pass-through.  The Arcana will take the ATV audio and send it directly to the ARC by bypassing the TV.  That has been the most consistent “resolution” in all of the forum posts I have read.  I keep hoping for somebody with the same issue to post a fix or for Samsung to post a firmware update that addresses this.  So far, nothing…

Based on the dozens of threads on here and other forums where people have very similar issues with Samsung TV’s in this setup, I believe the problem lies somewhere in the TV.  I have tried every combination of settings on the TV, and yes it is set to pass-through.  The Arcana will take the ATV audio and send it directly to the ARC by bypassing the TV.  That has been the most consistent “resolution” in all of the forum posts I have read.  I keep hoping for somebody with the same issue to post a fix or for Samsung to post a firmware update that addresses this.  So far, nothing…

Maybe speak to Samsung’s support desk, as there are often things they can do, or recommend you try - they may even have a firmware-update in the pipeline that may go onto fix things for you.

If the audio works in sync when using PCM stereo output, then that may show the TV is not passing through the multichannel LPCM (uncompressed) stream quickly enough from the Apple TV and see what Samsung have to say about that - Meanwhile, you could of course also try switching the Apple TV audio output to DD+ Atmos audio (compressed) too, just to see if that may improve things. 

Reply