sound is distorted [12.04] [the same as Bug #1183145]

[Miroslav Hadzhiev]

When you increase the volume to 60-70 % and above, there's a little sound distortion (it can be heard especially when human voice is being listened) and a lot sound distortion when the master volume is set to over 90 %.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pulseaudio 1:1.1-0ubuntu15.3
ProcVersionSignature: Ubuntu 3.5.0-36.57~precise1-generic 3.5.7.14
Uname: Linux 3.5.0-36-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D1', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf4700000 irq 47'
   Mixer name : 'Analog Devices AD1981'
   Components : 'HDA:11d41981,103c309f,00100200 HDA:14f12bfa,103c309f,00090000'
   Controls : 11
   Simple ctrls : 9
Date: Tue Jul 9 11:52:27 2013
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MarkForUpload: True
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/11/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68YAF Ver. F.1D
dmi.board.name: 309F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 54.3D
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68YAFVer.F.1D:bd07/11/2008:svnHewlett-Packard:pn:pvrF.1D:rvnHewlett-Packard:rn309F:rvrKBCVersion54.3D:cvnHewlett-Packard:ct10:cvr:
dmi.product.version: F.1D
dmi.sys.vendor: Hewlett-Packard
modified.conffile..etc.pulse.daemon.conf: [modified]
mtime.conffile..etc.pulse.daemon.conf: 2013-07-09T11:25:24.466465

[Raymond (superquad-vortex2)]

Simple mixer control 'PCM',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 30 [97%] [10.50dB] [on]
  Front Right: Playback 30 [97%] [10.50dB] [on]

[Raymond (superquad-vortex2)]

do you mean sound is distorted when PCM playback volume is over 0dB ?

Node 0x11 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out
  Control: name="PCM Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="PCM Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Amp-Out caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-Out vals: [0x1e 0x1e]
  Connection: 1
     0x03

[Miroslav Hadzhiev (xtigyro)]

It may well be the case BUT I just play a song on YouTube using Firefox 22 or in Rhythmbox. In other words, I DO NOT set the PCM playback manually in any way to be over 0 dB so I really do not know whether the PCM playback volume is set over that value.

[Miroslav Hadzhiev (xtigyro)]

I provided some new log PulseAudio files in the first reported bug (Bug #1183145).

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test.

[Launchpad Janitor (janitor)]

[Expired for pulseaudio (Ubuntu) because there has been no activity for 60 days.]

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