Public bug reported:
Recording directly with arecord works, but using pulseaudio has
crackling noise.
Workaround is to disable timer based scheduling in /etc/pulse/default.pa
AND setting
default-fragments = 4
default-fragment-size-msec = 90 (or higher, lower still produces noise)
in daemon.conf. Total hw buffer size is 371 ms (according to pulseaudio
-vvv > pulse.log)
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.11.0-15.22-generic 3.11.10
Uname: Linux 3.11.0-15-generic i686
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: martin 2432 F.... pulseaudio
Date: Mon Dec 9 09:29:29 2013
InstallationDate: Installed on 2013-04-22 (230 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:SIS966 failed
Symptom_Card: Internes Audio - HDA SIS966
Symptom_Jack: Mic, Internal
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [N90SV, Realtek ALC663, Mic, Internal] Underruns, dropouts or crackling
sound
UpgradeStatus: Upgraded to saucy on 2013-10-18 (51 days ago)
dmi.bios.date: 02/25/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 207
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N90SV
dmi.board.vendor: ASUS CORPORATION
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr207:bd02/25/2010:svnASUSTeKComputerInc.:pnN90SV:pvr1.0:rvnASUSCORPORATION:rnN90SV:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr:
dmi.product.name: N90SV
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2013-12-08T17:23:33.527378
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 saucy
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https://bugs.launchpad.net/bugs/1259070
Title:
N90SV, Realtek ALC663, Mic, Internal Underruns, dropouts or
crackling sound
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1259070/+subscriptions
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