Hi triune, thank you for filing the issue.
How often does the issue happen ?
Could you please file the feedback with "alt+shift+i", and mention bug number #761833 in the feedback ?

Thanks!

I just tried to leave feedback... but it seems that tool itself if having problems. After I filled it out and hit send, nothing happened. Tried to send again a minute later, same deal. Took a quite a few clicks on cancel and X to actually close the tool and get out of it.

As far as this issue is concerned, it started with Chrome 61 Beta for me. The issue is 100% reproducible when no audio is playing anywhere in ChromeOS. It's gotten so annoying that I keep a folder of mp3 files that are nothing but silence to play with the built-in ChromeOS audio player (continuously) in the background to avoid this issue re-occurring.

Some more information -- my wife has the same ChromeBox (Asus CN62) and she actually had this same  issue 6  months ago. She has powered desktop speakers attached to hers as well. However, after several months, the issue just stopped altogether. For her, the issue was slightly different -- her system only made the static noise when ChromeOS went into lower power mode (screen off). However, for me, it will happen regardless of power mode -- just when no audio is playing at all.

As I eluded to earlier, my wife also has an Asus CN62 which today received the stable channel m61 release. Consequently, her device began experiencing the same issue as my device (where it began weeks earlier being on the beta channel). IMO, something changed within the audio stack in m61 that needs to be rectified.

CN62 is guado.

This began on my Acer Chromebox CXI after updating to OS version 62. The buzzing starts approximately 20 seconds after pausing the music/video.

 

I am able to reproduce this on Guado with R63-10032.32.0 using Logitech Z130 external powered speakers. 

Logs here:
https://pantheon.corp.google.com/storage/browser/chromiumos-test-logs/bugfiles/cr/761833

The fixes in  issue 775486  should have fixed this at M63-10032.30.0 and M62-9901.75.0 
But it is strange that the static noise is still present at 10032.32.0

Jimmy, is this (not) a duplicate of  issue 775486 ?

@10 that other bug seems to produce an entirely different audio artifact than the one I've reported here.

This is dup to  issue 775486 
However, since in#8, the issue still happens after the fix, we should re-open the issue there.

Thanks for the feedback and testing, we found that the issue is not solved yet. Updated in  issue 775486   #62 .

i still have this issue

Problem occurring on my ASUS M004U for several months as well.

this issue continues to occur on my asus chromebox whenever i pause video in chromeos ver 62.0.3202.97

Could you please update to R63 ?
The fix was merged to R63.
https://bugs.chromium.org/p/chromium/issues/detail?id=775486#c73

Thank you and sorry for the inconvenience.

Still experiencing in Version 63.0.3239.86 (Official Build) beta (64-bit)

Me too.  Basically the computer is unusable now.  Always humming unless
active video or music playing.

Problem persists for me on Dell Chromebook 13 (7310). Also on Version 63.0.3239.86 (Official Build) beta (64-bit).

Problem persists for me on an Acer Chromebox also on the latest Chrome release. 

Glad to see I'm not the only one. Asus CN60 Model M004U Chromebox. Chrome OS 62.0.3202.97. Been going on for a few weeks. Pretty loud pop when the buzzing starts and when it stops. I've been cutting power to the speakers each time but sometimes I forget. Everything is fine when sound is being played.

Problem persists using Asus Chromebox with Version 62.0.3202.97 (Official Build) (64-bit)

Dell Chromebox Z01V (Intel i3 unit), actually all three units we have started this speaker buzzing after an OS update... It's not the speakers. All three of us are certain it was from the OS. Different rooms, different circuits, different brands/types of speakers (Logitech, generic, and Bose). Something changed on a previous OS, though I don't recall which version exactly...

p.s. The buzzing stops on all three of our affected units when audio is outputting if that helps locate the source... Basically when audio is doing nothing there's buzzing, but if any audio source is playing on any of the units, the buzzing ceases... Then when the audio stops, the buzzing comes back after a few seconds of the audio being or going into idle mode of some type...

3.5mm jack on chromebox produces a lot of noise that sounds like a grounding or shorted issue with external speakers.  This noise clears up *completely* when any sort of audio is about to start playing from the Chromebox. The problem stays cleared up for several seconds after the audio is finished playing.  In fact, if you open an 8 hour long youtube video and simply mute it in a different tab, you can work entirely without the noise.  Nothing else will cause the noise to go away short of disconnecting your speakers entirely.  I suppose you could also just listen to music all the time.  As long as there is something that is supposed to be playing through the speakers, the annoying buzzy/static noise will not play through the speakers.

CHROMEBOX-M004U speakers buzz loudly about 10-20 seconds after sound stops playing. When sound plays, speakers work normally. When sound stops playing, there is a short time of silence (as expected) but then a small pop with loud buzzing. Buzzing stops when sound is played again (music, youtube, video, etc). The only way to stop the buzzing is to turn off the speakers completely when no sound is playing.

Jan 23, 2018 - still happens. Dell Chromebook 7310, Version 63.0.3239.140 (Official Build) (64-bit).

This is maddening.

Hello,

Apparently there is such a thing as "laptop speakers."  I saw this on a HP thread.   If you use laptop speakers instead of desktop speakers, buzzing stops.  I put a dell sound bar on my chromebox and the buzzing is gone.  I moved the dell 2 speaker + subwoofer setup to a different computer.  The soundbar uses a USB connection instead of headphone so this is not apples to apples. 

If you are having buzzing which is god awful loud and annoying, try a different speaker type.

Still happening on my system today.
Your Chromebox is up to date
Version 63.0.3239.140 (Official Build) (64-bit)

Still happening on my ASUS Chromebox
Version 63.0.3239.140 

Hi!
Please switch to beta channel for M64, or wait for M64 stable update in the near future.

On Version 64.0.3282.87 it is reported to be fixed:
https://bugs.chromium.org/p/chromium/issues/detail?id=775486#c107

Thanks!

There is a ringing from the speakers about every 60 seconds.