Public bug reported:

Recently (since yesterday), during audio playback ("Videos" app, Chrome
(google music)) the audio will go from perfectly clear to complete
static white noise. This usually starts about 5 seconds into playback
and can last from about 10 to 40 seconds before returning to normal.

Playing with volume levels in the ubuntu audio mixer it sounds like the
audio has been auto-amplified and that is clipping and causing static,
but that's just a guess.

I've tried playing with a few pulse options to change things but can't
find anything which makes it any better.

I'm using analogue output on a usb speaker (dell soundbar), and have not
had problems since buying it or the rest of the pc, this seems to have
occurred fairly recently.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: pulseaudio 1:8.0-0ubuntu3.8
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Mar  4 15:56:02 2018
InstallationDate: Installed on 2012-11-17 (1933 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/28/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0211
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M5A78L-M/USB3
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0211:bd04/28/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM5A78L-M/USB3:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: pulseaudio (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Attachment added: "pulseaudio -vvvv --log-time=1"
   
https://bugs.launchpad.net/bugs/1753271/+attachment/5069066/+files/pulseverbose.log

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https://bugs.launchpad.net/bugs/1753271

Title:
  intermittent static during audio playback

Status in pulseaudio package in Ubuntu:
  New

Bug description:
  Recently (since yesterday), during audio playback ("Videos" app,
  Chrome (google music)) the audio will go from perfectly clear to
  complete static white noise. This usually starts about 5 seconds into
  playback and can last from about 10 to 40 seconds before returning to
  normal.

  Playing with volume levels in the ubuntu audio mixer it sounds like
  the audio has been auto-amplified and that is clipping and causing
  static, but that's just a guess.

  I've tried playing with a few pulse options to change things but can't
  find anything which makes it any better.

  I'm using analogue output on a usb speaker (dell soundbar), and have
  not had problems since buying it or the rest of the pc, this seems to
  have occurred fairly recently.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: pulseaudio 1:8.0-0ubuntu3.8
  ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
  Uname: Linux 4.4.0-116-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Mar  4 15:56:02 2018
  InstallationDate: Installed on 2012-11-17 (1933 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  SourcePackage: pulseaudio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/28/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0211
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M5A78L-M/USB3
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr0211:bd04/28/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM5A78L-M/USB3:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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