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[Petersampsonaudacity <1530365@xxxxxxxxxxxxxxxxxx>]

Steve wrote by email:

An alternative workaround for bug 276 appears to be to set the output
device to "dmix". I've been testing this for the past couple of days,
and no freezes when using dmix.

The advantage of dmix over "hw:" is that the vast majority of sound
cards do not have hardware mixing, so when the "hw:" device is used,
only one application can use it at a time. On the other hand, dmix is
a plug-in for ALSA that provides mixing, so multiple applications can
use the sound card simultaneously.

The downside of dmix compared to the "hw:" device is that not all
distros install it by default (though I think that most do).

The downside of dmix compared to PulseAudio is that it does not
support recording what is playing on the computer.

PulseAudio would be the best device to use if it were not for bug 276
(and it is the default for most modern Linux desktops).

Do we want to document this somewhere?

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https://bugs.launchpad.net/bugs/1530365

Title:
  Audacity plays too fast and crashes

Status in Audacity:
  Confirmed
Status in audacity package in Ubuntu:
  New

Bug description:
  I use a Samson «Go mic» for recording audio with Audacity. I connect
  my earphones to the mic and use it for hearing both my own voice live
  and the computer sound (I have to select it in Ubuntu's sound output
  settings).

  This works fine for a while, and I can record and play back through
  the mic. Seemingly randomly, however, pressing play or otherwise
  trying to start playback sometimes makes Audacity skim quickly through
  the audio, playing garbled sounds which I assume are a fast forward
  version of my audio. Sometimes, it resumes normal playback before it
  reaches the end of the file, and everything seems fine. Most often,
  though, it does not, and pressing the stop button or anything else
  crashes Audacity. If I restart Audacity and restore the autosaved
  audio, the problem persists. However, selecting another audio output
  in Ubuntu's sound settings fixes the problem.

  I recently upgraded to Ubuntu 15.10, but this has been a problem since
  at least 15.04. I now use Audacity 2.0.6-2build1.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: audacity 2.0.6-2build1
  ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
  Uname: Linux 4.2.0-22-generic i686
  NonfreeKernelModules: nvidia
  AlsaCards:
   0 [SB             ]: HDA-Intel - HDA ATI SB
                         HDA ATI SB at 0xfe024000 irq 16
    1 [GoMic          ]: USB-Audio - Samson GoMic
                         Samson Technologies Samson GoMic at usb-0000:00:12.0-2, full speed
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: i386
  CurrentDesktop: Unity
  Date: Thu Dec 31 16:11:33 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-11-23 (402 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release i386 (20141022.1)
  SourcePackage: audacity
  UpgradeStatus: Upgraded to wily on 2015-12-27 (3 days ago)

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