pcm playback volume of the analog mixer have 12dB gain which is
different from those front, ... , side playback volume
Simple mixer control 'Input Source',0
Capabilities: cenum
Items: 'Mic' 'Line' 'CD' 'Stereo Mixer'
Item0: 'Mic'
you can select stereo mixer to record what is playing
Node 0x16 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Control: name="PCM Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="PCM Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=0, ofs=0
Control: name="Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=2, ofs=0
Control: name="Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=2, ofs=0
Control: name="Line Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=3, ofs=0
Control: name="Line Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=3, ofs=0
Control: name="CD Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="CD Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x17 0x17] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
[0x80 0x80] [0x80 0x80]
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 7
0x10 0x1f 0x1a 0x1b 0x1e 0x1d 0x25
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https://bugs.launchpad.net/bugs/1024702
Title:
[1002:4383 + VIA VT1708S] Crackling sound when using vlc
Status in “alsa-driver” package in Ubuntu:
Confirmed
Bug description:
Crackling on sound when using vlc on ubuntu 12.04. As suggested in
https://wiki.ubuntu.com/Audio/PositionReporting I tried in
/etc/modprobe.d/alsa-base.conf setting
options snd-hda-intel position_fix=1
which appeared to have no effect
options snd-hda-intel position_fix=2
which stopped the crackling but the sound was then broken up into sub-second
chunks with gaps between
finally in /etc/pulse/default.pa
load-module module-udev-detect tsched=0
fixed the problem.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic-pae 3.2.19
Uname: Linux 3.2.0-26-generic-pae i686
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: VT1708S Analog [VT1708S Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: colinl 1892 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe8f4000 irq 16'
Mixer name : 'VIA VT1708S'
Components : 'HDA:11060397,18490397,00100000'
Controls : 38
Simple ctrls : 17
Date: Sat Jul 14 13:39:25 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386
(20120423)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB successful
Symptom_Card: Built-in Audio - HDA ATI SB
Symptom_Jack: Green Line Out, Rear
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [To Be Filled By O.E.M., VIA VT1708S, Green Line Out, Rear] Underruns,
dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/21/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.00
dmi.board.name: A790GXH/128M
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.:bvrP1.00:bd01/21/2009:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnA790GXH/128M: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.
modified.conffile..etc.modprobe.d.alsa.base.conf: [modified]
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2012-07-14T13:26:41.369257
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