Comment 19 for bug 1246092

I tried the latency set to 30 and I get sound and no lock-ups, but the
sound is clipped on playback (generated mp3s are fine)

On 5/1/14, Robert Showalter <email address hidden> wrote:
> Reflecting previous comment, same symptom. Interestingly however, it
> works with the value down to PULSE_LATENCY_MSEC=1 for me. But not
> supplying this, garbled sound with tendency to freeze.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> 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)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/audacity/+bug/1246092/+subscriptions
>

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