Contributor I

Random 1 sec audio drop when playing Dolby Atmos from Apple TV 4K

Forum|Forum|3 years ago
April 29, 2023
72 replies
10996 views

Hi. I've seen some people describing loud sound pop and Audio loss when playing Dolby Atmos from Apple TV 4K and Sonos Arc. I don't experience loud pop, but I do experience Audio loss for approx. 1 second at random places when watching content with Dolby Atmos.

My setup in short is: Apple TV 4K -> [Belkin High-Speed 4K/8K cable] -> Samsung QE75 [eArc] <- [Sonos cable] Sonos Arc (WiFi: One + One SL + Sub )

I've been in contact with Sonos support Norway, and we've done some troubleshooting, but we haven't found a solution yet.

My observations so far:

Sound drops out for 1 second when playing content with Dolby Atmos from tv, HBO Max or Netflix from Apple TV 4K.
Sound does NOT drop out when playing content with Dolby Atmos from tv, HBO Max or Netflix directly from Samsung TV.
Once Dolby Atmos sound completely disappeared when I was watching a movie with Dolby Atmos. Every content I played from Apple TV with Dolby Atmos consistently had no sound. Tried tv, HBO Max, Netflix and demo video on Dolby Summit. Got sound back when playing content with 5.1. If I went to Apple TV > Settings > Video and Audio > Audio Format > Immersive Audio > and turned off Dolby Atmos, I got the sound back on the content where Dolby Atmos didn't work. I switched back and forth on this several times. If I turned on Dolby Atmos, the sound disappeared again. I didn't get sound with Dolby Atmos until I restarted Apple TV. Diagnosis number from when this happened: 518945904.
Still, the sound drops out for 1 second randomly when I watch content with Dolby Atmos, e.g. The Last of Us on HBO Max. Sometimes 19 minutes into the episode. Other times 26 minutes or 50 minutes into an episode.
I've recorded an audio clip where you can hear the sound dropping out for 1 second. It happens very quickly, but is very annoying.
I don't know if it has any correlation, but I have a feeling it happens when there is a sudden change in the sound image, e.g. going from silence to music or talking.
I haven't noticed songs with Dolby Atmos dropping out when playing from Apple Music or TIDAL.
Sonos asked me to remove the Ethernet cable from the Arc. I have also tried with the Ethernet Cable out and turning off WiFi on the Arc. No difference. Audio drop still there. As i write this Arc is connected with Ethernet.

Some recent diagnostics (04.29.23):
150497503

931202808

1971558742

My Apple TV 4K:

(3rd generation) Wi-Fi + Ethernet. A2843 (128 GB). tvOS 16.5. Resolution 2160p UHD - 60Hz HDR10 4:2:0.

My Video and Audio settings on Apple TV 4K:

Video:

Format: 4K HDR (HDR10+)
Use HDR+: Enabled
Chroma: 4:2:0
Match content: Off
HDMI Connection: Good. (Apple TV 4K is connected to HDMI (not e-Arc port) Samsung with a Belkin UltraHD High-Speed 8K/4K 2m HDMI cable)

Audio:

Audio Output: TV Speakers
Audio Format: Auto, Atmos Available
Reduce Loud Noise Sounds: Off
Audio Mode: Auto

Calibration:

Wireless Audio Sync - not used

My Samsung 75-inch TV:

Model code: QE75Q80TATXXC

Software Version: T-NKMDEUC-2401.1, B0052220/B60202, BT - S

Sound settings:

Sound Output: Receiver (HDMI-eARC)
HDMI-eARC Mode: Auto (only Auto or Off)
Digital Output Audio Format: Pass-through
Digital Output Audio Delay: 100 (default)
Dolby Atmos Compatibility: Turned on

Sonos Arc is connected to the eARC port on the Samsung with the HDMI cable that came with the Arc.

I also have a PS5 connected to the TV.

My Sonos setup for surround

About My System:

Sonos Arc:
Living Room Status: Connected
Sonos OS: S2
Version: 15.3 (build 72240060)
Hardware Version: 1.27.1.8-2.2
Series ID: A100
IP Address: 10.0.0.3
Audio In: Dolby Atmos
WM: 0 (currently connected with Ethernet)

Arc settings:

EQ: Bass and Treble at 0. Loudness On.

Trueplay: On

Surround Audio: TV level: 0. Music Level: -4. Music Playback: Ambient.

Spatial Music: On

Home Theater:

TV Autoplay: On

Ungroup on Autoplay: On

TV Dialog Sync: 0 (default)

Group Audio Overlay: Low (default)

The Arc is connected to:

Sonos One: Living Room (LS)
Status: Connected
Sonos OS: S2
Version: 15.3 (build 72240060)
Hardware Version: 1.21.1.8-2.2
Series ID: A100
IP Address: 10.0.0.12
WM: 1 (not possible with Ethernet in my current setup)

Sonos One SL: Living Room (RS)

Status: Connected

Sonos OS: S2 Version: 15.3 (build 72240060)

Hardware Version: 1.26.2.3-2.2

Series ID: A300

IP Address: 10.0.0.9

WM: 1 (not possible with Ethernet in my current setup)

Sub: Sub

Status: Connected

Sonos OS: S2

Version: 15.3 (build 72240060)

Hardware Version: 1.32.1.4-2.2

Series ID: A200

IP Address: 10.0.0.10

WM: 1

I have seven other Sonos speakers placed in other rooms in my apartment, but the surround setup above are the only selected speakers in the app when the sound drops.

Sonos system settings:

Audio Compression: Automatic

Network: SonosNet Channel 1

I hope Sonos support and the Sonos Community find something useful from this!

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Show previous replies

C

Cord

Enthusiast I

No solution just the same ongoing issue which I have had all the time of owning the Beam gen 2 purchased shortly after the release. So I have been waiting a long time for a fix.

P

PipeCL

Trending Lyricist I

Same problem without solution, I even contacted the CEO but he told me that I just have to wait (I've been there for 1 year).

C

Cord

Enthusiast I

Lol telling people they have to wait, after the popping fiasco you would think they would want to get this sorted as well. Classic case of we have your money so why should we rush to fix things. I have been waiting for over 2 years for this to be fixed.

C

Cord

Enthusiast I

15.11 now available will test this later, hopefully it has the fix finally, but I wont hold my breath

Well that’s a no then

Diagnostics submitted

231070897

K

kingbiscit

Contributor I

I'm having the exact same issue. Samsung TV, Apple TV and Sonos Beam. Only happens when Atmos is enabled.

R

ryan.mccollum

Might be unrelated, but I also see audio stuttering ONLY on Atmos 4K discs playing through my LG C2 and Sonos Ultimate Immersive setup.

There must be some glitch with playing Atmos tracks.

I haven’t verified whether 15.11 solves it yet.

M

mfl1970

Lyricist III

L15.11 didn’t solve the problem for me.

According to Reddit posts the problem is Dolby MAT

The Apple TV sends out Atmos via Dolby MAT encapsulated in LPCM some TVs have a problem passing this through. Until recently the Apple TV and some Blu-ray players were the only devices using this method and with the Blu-ray players you can change from PCM to bitstream in the settings. Now more devices are using Dolby MAT and Rtings tests for LPCM and Dolby MAT passthrough in their latest reviews, not all TV's pass the test.

Since Sonos and Bose soundbars only have the one eARC HDMI their forums are full of posts about problems with LPCM. Most from Apple TV and gaming console owners.

C

Cord

Enthusiast I

Yes as I stated myself 6 months ago it is a Dolby MAT issue, however I have now refitted my HDFury Arcana so no more sound dropouts now, expensive fix I know but it works and for those who need multiple connections the Roofull 4k HDMI switch is known to play well with the HDFury Arcana.

J

JWPersh

Lyricist I

So is the random 1 second sound drop out when Apple TV 4K is enabled a Sonos issue or is my Samsung TV not passing through the Dolby Atmos signal correctly?

As others have noted. To have been dealing with this issue for over a year is insane given the companies involved are Apple, Sonos and Samsung. Surely between the 3 of them they could work out a software patch to fix an issue effecting so many of their customers.

Anyone tried emailing all 3 CEOs in a single email lol? Maybe contacting The Verge to get them to cover the story and use PR shaming to get some action.

C

Cord

Enthusiast I

Had to remove the HDFury Arcana, wife did not like the delays/black screens so back to the dropouts now.

Show more replies

My observations so far:

My Apple TV 4K:

My Video and Audio settings on Apple TV 4K:

Video:

Audio:

Calibration:

My Samsung 75-inch TV:

Sound settings:

My Sonos setup for surround

About My System:

Sonos system settings:

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