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[shafin <mahdee.jameel@xxxxxxxxx>]

I ran into this problem on Ubuntu 14.04 64 bit. The method from pos 14
initially did not work for me, but setting PULSE_LATENCY_MSEC=1 using
the same command did the trick. I also tried the method from post 21
first, which, unfortunately, did not work for me.

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https://bugs.launchpad.net/bugs/1246092

Title:
  Ubuntu 13.10 upgrade: audacity sound is trashed, program highly
  unstable

Status in “audacity” package in Ubuntu:
  Confirmed

Bug description:
  On playback I get a rough static that crackles corresponding to the
  waveform intensity; on occasion the sound may start as noise and then
  flip into proper sound output, but when paused the subsequent playback
  will produce static and pausing that will crash the program.  I have
  tried Playback set to Alsa/pulse and Alsa/default, both give this
  behaviour.  When the selected sample is played as noise, the scrolling
  cursor works, but appears to be scrolling by much faster than real-
  time.

  also, when the playback works, the scrolling cursor behaves very
  strangely: the thin line may not move at all, or a segment of it may
  stay put while another part of it scrolls along with the sound.

  This is a fresh upgrade to 13.10 on a 64-bit Ubuntu machine, a
  ZaReason Strata laptop with nvidia sound (according to alsa).

  Audacity worked fine on 13.04, occasional lock ups, but Audacity is
  prone to occasional lock-ups, and the sound was fine.  Audio works
  fine with other audio apps including youtubes, totem, vlc and sushi.
  If I highlight a segment of sound in Audacity and export to disk as
  mp3, sushi will play the resulting mp3 fine.  The problem seems
  peculiar to Audacity playback.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: audacity 2.0.3-1
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaCards:
   0 [PCH            ]: HDA-Intel - HDA Intel PCH
                         HDA Intel PCH at 0xc5400000 irq 50
    1 [NVidia         ]: HDA-Intel - HDA NVidia
                         HDA NVidia at 0xc3000000 irq 17
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  Date: Tue Oct 29 17:24:18 2013
  InstallationDate: Installed on 2012-04-27 (550 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_CA:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: audacity
  UpgradeStatus: Upgraded to saucy on 2013-10-22 (6 days ago)

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