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[Raymond <1369258@xxxxxxxxxxxxxxxxxx>]

how do pulseaudio get base volume -36 dB since dB range is less than 30

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https://bugs.launchpad.net/bugs/1369258

Title:
  [USB-Audio - USB Device 0x47f:0xad01, playback] volume slider problem

Status in “alsa-driver” package in Ubuntu:
  New

Bug description:
  Sound from my headphones disappears when the volume slider is around
  30% along.

  A look at alsamixer in the terminal shows the PCM value is 0<>0 on the audio device. 
  The slider in Ubuntu's desktop environment is at 100% when alsamixer shows  PCM  is at 100<>100 or Item: PCM dB gain: -0.06, -0.06
  The slider is at 30% or so volume when I cease hearing anything and the PCM is at 0<>0 or Item: PCM dB gain: -28.19, -28.19.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Sep 14 22:35:46 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-05-25 (111 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Cypress HDMI Audio [Radeon HD 5800 Series] - HDA ATI HDMI
  Symptom_Type: Volume slider, or mixer problems
  Title: [USB-Audio - USB Device 0x47f:0xad01, playback] volume slider problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/26/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1703
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P7P55D-E PRO
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1703:bd06/26/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7P55D-EPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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