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[Hadrien Titeux <1460498@xxxxxxxxxxxxxxxxxx>]

Same here on ubuntu 15.10, with an Avid Fastrack Solo external (USB)
soundcard.

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https://bugs.launchpad.net/bugs/1460498

Title:
  Unable to play back sound or plays back too fast with Audacity on
  Ubuntu 15.04 with wireless USB Headset

Status in audacity package in Ubuntu:
  Confirmed

Bug description:
  I can record my voice just fine with my headset, but Audacity doesn't
  detect my headset's output. So it records fine, but when it's set to
  "default" or "pulse", I can't play back ANYTHING OR it just plays back
  too fast, trying to play back to my headset, either way is
  unacceptable.

  I have a Logitech Wireless Headset H600 ( USB ).
  Audacity 2.0.6
  Ubuntu 15.04

  nothing_much@nothingmuchheretosay:~$ audacity
  ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
  ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
  ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
  ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
  ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map
  bt_audio_service_open: connect() failed: Connection refused (111)
  bt_audio_service_open: connect() failed: Connection refused (111)
  bt_audio_service_open: connect() failed: Connection refused (111)
  bt_audio_service_open: connect() failed: Connection refused (111)
  Cannot connect to server socket err = No such file or directory
  Cannot connect to server request channel
  jack server is not running or cannot be started
  21:43:19: Debug: DirManager: Created new instance.
  Expression 'stream->playback.pcm' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4611
  Expression 'stream->playback.pcm' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4611
  Expression 'stream->playback.pcm' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4611
  Expression 'stream->playback.pcm' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4611
  Expression 'stream->playback.pcm' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4611
  21:43:25: Debug: AudioIO::GetBestRate() for capture
  21:43:25: Debug: GetBestRate() suggested rate 44100 Hz
  21:43:25: Debug: GetBestRate() Returning 44100 Hz
  ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred
  ALSA lib pcm.c:7843:(snd_pcm_recover) underrun occurred

  The ALSA lib pcm thing repeats after every attempt to play back,
  happens when it attempts to play back.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: audacity 2.0.6-2 [modified: usr/share/applications/audacity.desktop]
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun May 31 21:33:16 2015
  InstallationDate: Installed on 2015-05-15 (16 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: audacity
  UpgradeStatus: Upgraded to vivid on 2015-05-15 (16 days ago)

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