Known Issues

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Revision as of 23:34, 24 October 2010 by Windinthew (talk | contribs) (Reverted edits by Valera (Talk) to last revision by Galeandrews)
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This page contains details of Audacity problems that are identified after a version has been released, and so are not included in the "Known Issues at Release" section of the Release Notes for current stable and Beta versions. This page will be cleared after each release of Audacity, as all issues will by then either be fixed or appear as known issues in the Release Notes for the new version.


Please do not use this page to report problems you are having with Audacity or suspected bugs, as it will not be regularly checked by the support team. Instead, please see our Reporting Bugs page for advice on how to identify your problem and report it to us if you need to.



Audacity 1.3.12: Released 1 April 2010 for Windows, Mac OS X and Linux, including provisional support for Windows 7

Active issues

  • Sliding Time Scale/Pitch Shift has a reversed pitch control and gives incorrect results at sample rates of 48000 Hz or higher
  • Audacity may freeze if using the Nero AAC encoder to export via (external program). It is reported this only occurs when using multiple CPU cores. Workaround: Export to AAC directly by adding FFmpeg to your computer, or set Audacity to use only one CPU core.
  • (OS X) Playback to Bluetooth headsets gives an error. Workaround: Revert to Audacity 1.3.3, or use Soundflower to send the Audacity output to an audio application that works with the headset.
  • (Linux) Audacity requires either FFmpeg 0.5 from Spring 2009, or a later library or package from that year.
    • FFmpeg from SVN after June 1st 2010 may cause Audacity not to compile with error "invalid conversion from ‘int (*)(URLContext*, unsigned char*, int)’ to ‘int (*)(URLContext*, const unsigned char*, int)’" in FFmpeg.cpp:257. Workaround: change src/FFmpeg.cpp line 207 from "static int ufile_write(URLContext *h, unsigned char *buf, int size)" to "static int ufile_write(URLContext *h, const unsigned char *buf, int size)"
    • Any FFmpeg libraries or packages built in 2010 may not be recognised by Audacity (Help > Show Log will list an error "undefined symbol: match_ext"). Workaround: Re-compile Audacity and change all instances of "match_ext" in ../src/FFmpeg.h and ../src/FFmpeg.cpp to "av_match_ext".


Fixed since release

The following problems can be corrected by downloading one of our nightly development builds, or by compiling Audacity from our latest development code:
  • Nyquist effects: in locales where comma acts as the decimal separator, entering a comma in a text box to left of a slider only produced the whole number before the comma.
  • Sliding Time Scale/Pitch Shift caused a freeze or crash if more extreme settings were used, especially if applied to regions of a few seconds or less.
  • If exporting to signed 24- or 32-bit PCM WAV from a 32-bit project, the polarity of any clipped samples could be reversed, leading to serious distortion even if no distortion was apparent before export
  • Crash sorting imported stereo files by name, and when sorting an offset (unsplit) stereo track
  • Silent regions in tracks were truncated when pasting the track to a new project
  • Imported stereo files had a "1" appended to the track name
  • If "Editing a clip can move other clips" was unchecked, generating into an existing selection produced error "not enough room available to generate the audio"
  • (OS X, Linux) Resampling to the current project rate caused the audio to be slightly truncated
  • (Linux) Entering Chinese characters in a label with IBus input method caused Audacity to freeze