I occasionally get a loud buzzing over the audio from Beam connected with HDMI

Show first post

115 replies

I have had the exact same issue 3 times since the S2 update, though I'm yet to grab a diagnostic of it happening.

I have a Beam connected via HDMI Arc to an LG TV. In all 3 cases it's happened when using the Prime Video app on the TV itself (although even this doesn't happen every time).

Turning the TV off stops the buzzing, but as soon as the TV is switched back on again the buzzing returns, even when just viewing a menu. Similarly, unplugging the TV from the mains and plugging it back in again, as soon as the TV is switched on the buzzing returns.

Disconnecting and reconnecting the HDMI leads from both ends doesn't fix it. As soon as the HDMI is reconnected the buzzing restarts.

As others have mentioned, if I switch the TV off and then get the Beam to stream some music, it sounds fine. Turn the TV back on again, and the buzzing returns.

The only thing that fixes it is pulling the mains on the Beam.

I have a Sky box and a PS4 plugged into the TV via HDMI too, and have tried disconnecting these in case the TV is trying to pass nonsense from one of those (both are on standby), but again the buzzing continues.

I had no issues of this kind with the S1 firmware so can only assume that the S2 firmware is causing the issue.

Same problem as described in various comments here.


Music plays fine without the buzzing but once the TV (Samsung QLED) is switched on, the buzzing starts even without opening Netflix or Youtube. 

Submitted a diagnostic report: 1755628959

Badge +1

Sonus seems to have gone quiet over this issue. Please could we all have a further update.

I can confirm that as well as seeking backwards in the Prime app on my TV triggering it, I too get the issue when using the YouTube app.

Today my wife and kids resorted to simply unplugging the Beam and not using it. It's turned into a rather expensive ornament.

The Beam is the only Sonos product I own, so there's no tangible benefit (as far as I can see) to me using S2. Is there a way of simply rolling it back to S1 firmware? I suspect that'll fix it.

Badge +1

I'm now also getting issues with the sound not playing when I turn my tv on. I have to pull the HDMI Arc cable then reconnect it. This has happened 6 times in the last 10 days. 


Also, it seems Sonus have turned their backs on this issue for the time being as I've not had an up date in over a week. Over £600 spent on Sonus equipment since last Christmas and all the problems started after the S2 update.


Same issue here, started when using YouTube App on Samsung TV, unfortunately disconnecting and reconnecting does not resolve the issue, even temporarily

Userlevel 5
Badge +16

Hello all,

I’ve looked over the submitted diagnostics and have this to offer:

If you have only a Beam and no bonded surrounds, make sure that your TV is set to output PCM rather than Dolby Digital or “Auto”.

If you have bonded surrounds, make sure that it is not set to “Auto” but to either PCM or Dolby Digital. 

If this issue is only occurring on certain sources e.g. PBS content or YouTube (or Netflix or Prime) check to see if you can adjust the audio format for that account or streaming app.

If you have a Samsung TV, does switching to the provided optical adapter change anything?

Have you fully rebooted your TV since this issue began (unplug completely from power then plug it back in)

In most cases this issue has entirely to do with the audio format that the TV is passing on to the Beam and this is reflected in the diagnostic data as well.

If all suggestions in this thread have been exhausted, please reach out to us directly for one-on-one support. 

Badge +1

Hello Jean, 


If this is the case why has it only happened since the Sonus 2 update. I never experienced any difficulties before the update.

Userlevel 5
Badge +16


It is possible that the update may have reset the CEC connection between your TV and the Beam but the only change consistently reflected in the data is the formatting of the signal coming into the Beam from the external HT source.

Other than that, I could not say.      

Badge +1

I'm not happy about setting my tv out put to PCM  as the quality is not as good. I'm still feel the update is to blame here. I repeat there was no issue before the update. 

Userlevel 5
Badge +16

Hello @Vosabhoy 

I completely understand your frustration, unfortunately your TV doesn’t allow us to lock in the audio format to anything other than PCM/Stereo.

With your set-up I would like to see you up and running with full 5.0 surround. 

Way back in the beginning of this thread, when you were using the optical adapter, the buzzing behavior and the LG TV were the same?

Do you have another device with an HDMI/ARC or Optical audio port that we can test with your Beam?

Do you have another HDMI/ARC cable that we can switch out so we can eliminate the cable itself as a source of this audio issue? 

Badge +1

Unfortunately I don't have another hdmi arc cable or alternative tv with this port.

Is anybody else experiencing this. It only started happening yesterday and I have had my Beam for about a year.

I have the Beam connected to my Samsung Smart TV using HDMI (ARC) and it happened when I started a YouTube video through the TV YouTube app. There was a loud buzzing noise over the audio. At first I thought it was a TV problem, but I switched to the TV speaker and it was fine. When I switched back to HDMI the problem persisted. I also unplugged the HDMI from the Beam and plugged it back in but the problem persisted. After rebooting the Beam (by removing and reinserting the power cord) the problem went away. However it has happened at least 3 times over the last 24 hours.

It should be noted that if I stream to the beam over airplay while in this state the buzzing doesn’t happen.

Also the Beam is in a surround setup with a Sub and 2 Sonos Ones.

As it just started happening I wondered if it was due to a software update or something.

Have exactly the same problem, happens every time the adverts come on when watching something on ITV Hub. Only remedy is to reboot the beam. Very annoying! 

Userlevel 5
Badge +16


Do you have a DVD/DVR/Game System that has either and ARC or an Optical port?

Badge +1

When are Sonus going to do something about the S2 update issues? Things are going from bad to worse. I've lost all my speakers from the the app took me over an hour of deleting then re installing the app pulling cables the reconnecting. I'm now experiencing loss of sound from time to time. I have to reseat the hdmi Arc cable to get the sound back. Nearly £700 spent and since the S2 update it's been a nightmare.