Public bug reported:

Alsa driver report an invalid value, which is why 100% volume, quality is 
greatly reduced, if i move the slider to adjust the sound division "without 
amplification" everything is perfect. 
In the applet sound, when slider at the end, sound again noticeably 
deteriorates.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: alsa-base 1.0.25+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1
Uname: Linux 3.5.0-21-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu9
Architecture: i386
Date: Wed Jan  9 00:26:25 2013
InstallationDate: Installed on 2012-11-09 (60 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:NVidia successful
Symptom_Card: Встроенное аудио - HDA NVidia
Symptom_Jack: Green Line Out, Rear
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Digital clip or distortion, or "overdriven" sound
Title: [To Be Filled By O.E.M., VIA VT1705, Green Line Out, Rear] Sound is 
distorted
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/19/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.60
dmi.board.name: N68C-S UCC
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP1.60:bd09/19/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68C-SUCC:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 quantal running-unity

** Summary changed:

- [To Be Filled By O.E.M., VIA VT1705, Green Line Out, Rear] sound card reports 
false as "100%, unamplified"
+ [ VIA VT1705, Green Line Out, Rear] sound card reports invalid value as 
"100%, unamplified"

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https://bugs.launchpad.net/bugs/1097480

Title:
  [ VIA VT1705, Green Line Out, Rear] sound card reports invalid value
  as "100%, unamplified"

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