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[Rkfg <1315212@xxxxxxxxxxxxxxxxxx>]

Tried with a stereo 48k file (converted /usr/share/sounds/KDE-Im-Cant-Connect.ogg to wav, tested with ffprobe that it's truly 48k/2chan) and 64 bytes buffer size:
# aplay -D plughw:CARD=CA0106 -v --buffer-size=64 /tmp/kde.wav
Playing WAVE '/tmp/kde.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
Plug PCM: Hardware PCM card 0 'CA0106' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : RW_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 2
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 16
  buffer_size  : 64
  period_size  : 16
  period_time  : 333
  tstamp_mode  : NONE
  period_step  : 1
  avail_min    : 16
  period_event : 0
  start_threshold  : 64
  stop_threshold   : 64
  silence_threshold: 0
  silence_size : 0
  boundary     : 4611686018427387904
  appl_ptr     : 0
  hw_ptr       : 0
underrun!!! (at least 0.010 ms long)
Status:
  state       : XRUN
  trigger_time: 260136.459825170
  tstamp      : 260136.459834181
  delay       : 0
  avail       : 64
  avail_max   : 64
underrun!!! (at least 0.020 ms long)
Status:
  state       : XRUN
  trigger_time: 260136.460064991
  tstamp      : 260136.460084242
  delay       : 0
  avail       : 64
  avail_max   : 64

No underruns with 128b buffer.

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Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1315212

Title:
  [CA0106 - CA0106, playback] Playback problem - Surround dies, no valid
  output

Status in ALSA driver:
  Confirmed
Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  This is tested against a Creative Labs Sounblaster live! (sb0410) card
  and a SoundBlaster Audigy se (sb0570). Both of them behave strangely,
  output coming through some, but not all speakers, etc. This was
  working in 13.10 under the sb0410. the ca0106 driver is the same for
  both cards.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic i686
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  joshp     30385 F.... pulseaudio
   /dev/snd/controlC0:  joshp     30385 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu May  1 21:37:12 2014
  InstallationDate: Installed on 2014-04-28 (3 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:CA0106 failed
  Symptom_Card: Built-in Audio - Intel ICH6
  Symptom_Type: None of the above
  Title: [CA0106 - CA0106, playback] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/03/2006
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0G8310
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd03/03/2006:svnDellInc.:pnOptiPlexGX280:pvr:rvnDellInc.:rn0G8310:rvr:cvnDellInc.:ct3:cvr:
  dmi.product.name: OptiPlex GX280
  dmi.sys.vendor: Dell Inc.

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