: [alsa-source-ALC663 Analog] alsa-util.c: Trying to disable ALSA period 
wakeups, using timers only
D: [alsa-source-ALC663 Analog] alsa-util.c: Maximum hw buffer size is 371 ms
D: [alsa-source-ALC663 Analog] alsa-util.c: Set buffer size first (to 16384 
samples), period size second (to 8192 samples).
I: [alsa-source-ALC663 Analog] alsa-util.c: ALSA period wakeups disabled
D: [alsa-source-ALC663 Analog] alsa-source.c: hwbuf_unused=0
D: [alsa-source-ALC663 Analog] alsa-source.c: setting avail_min=15502
D: [alsa-source-ALC663 Analog] alsa-source.c: hwbuf_unused=0
D: [alsa-source-ALC663 Analog] alsa-source.c: setting avail_min=15502
I: [alsa-source-ALC663 Analog] alsa-source.c: Time scheduling watermark is 
20.00ms
I: [alsa-source-ALC663 Analog] alsa-source.c: Resumed successfully...
I: [alsa-source-ALC663 Analog] alsa-source.c: Starting capture.

D: [pulseaudio] module-suspend-on-idle.c: Source 
alsa_input.pci-0000_00_0f.0.analog-stereo becomes idle, timeout in 5 seconds.
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
D: [pulseaudio] memblockq.c: memblockq requested: maxlength=33554432, 
tlength=0, base=4, prebuf=0, minreq=1 maxrewind=0
D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=33554432, 
tlength=33554432, base=4, prebuf=0, minreq=4 maxrewind=0
I: [pulseaudio] source-output.c: Created output 17 "ALSA Capture" on 
alsa_input.pci-0000_00_0f.0.analog-stereo with sample spec s16le 2ch 44100Hz 
and channel map front-left,front-right
I: [pulseaudio] source-output.c:     media.name = "ALSA Capture"
I: [pulseaudio] source-output.c:     application.name = "ALSA plug-in 
[audacity]"
I: [pulseaudio] source-output.c:     native-protocol.peer = "UNIX socket client"
I: [pulseaudio] source-output.c:     native-protocol.version = "28"
I: [pulseaudio] source-output.c:     application.process.id = "28751"
I: [pulseaudio] source-output.c:     application.process.user = "martin"
I: [pulseaudio] source-output.c:     application.process.host = "martin-N90SV"
I: [pulseaudio] source-output.c:     application.process.binary = "audacity"
I: [pulseaudio] source-output.c:     application.language = "de_AT.UTF-8"
I: [pulseaudio] source-output.c:     window.x11.display = ":0"
I: [pulseaudio] source-output.c:     application.process.machine_id = 
"b1897efd1271d7193610a64c51750c4a"
I: [pulseaudio] source-output.c:     application.process.session_id = "c3"
I: [pulseaudio] source-output.c:     application.icon_name = "audacity"
I: [pulseaudio] source-output.c:     module-stream-restore.id = 
"source-output-by-application-name:ALSA plug-in [audacity]"
D: [pulseaudio] memblockq.c: memblockq requested: maxlength=4194304, tlength=0, 
base=4, prebuf=1, minreq=0 maxrewind=0
D: [pulseaudio] memblockq.c: memblockq sanitized: maxlength=4194304, 
tlength=4194304, base=4, prebuf=4, minreq=4 maxrewind=0
I: [pulseaudio] protocol-native.c: Final latency 60.00 ms = 30.00 ms + 30.00 ms
D: [alsa-source-ALC663 Analog] alsa-source.c: latency set to 30.00ms
D: [alsa-source-ALC663 Analog] alsa-source.c: hwbuf_unused=60244
D: [alsa-source-ALC663 Analog] alsa-source.c: setting avail_min=442
D: [alsa-source-ALC663 Analog] alsa-source.c: latency set to 30.00ms
D: [alsa-source-ALC663 Analog] alsa-source.c: hwbuf_unused=60244
D: [alsa-source-ALC663 Analog] alsa-source.c: setting avail_min=442


D: [alsa-source-ALC663 Analog] source.c: Volume not changing
D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
D: [pulseaudio] module-udev-detect.c: /dev/snd/controlC0 is accessible: yes
D: [pulseaudio] module-udev-detect.c: Resuming all sinks and sources of card 
alsa_card.pci-0000_00_0f.0.
D: [alsa-source-ALC663 Analog] alsa-source.c: hwbuf_unused=0

hwbuf_unused = 0 mean all 371ms buffer are used if it still use 20ms
sleep time, pulseaudio sleep 351 ms but audicty expect pulseaudio return
audio for every 30ms

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1259070

Title:
   N90SV, Realtek ALC663, Mic, Internal  Underruns, dropouts or
  crackling sound

Status in “pulseaudio” package in Ubuntu:
  Incomplete

Bug description:
  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

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