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AfterDawn > Software downloads > Audio & Video > Audio editing > Audacity for Windows > Version history

Version history for Audacity for Windows

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Changes for v2.4.1 - v2.4.2 RC1

Improvements
* Audacity is now built with (our version of) the wx3.1.3 library.
Previously we used wx3.1.1.
* We added a command 'Reset Configuration' to reset to default
settings.
* MP3 Audio is now exported without padding.

Changes for v2.3.3 - v2.4.0

Improvements
* Audacity now runs on Mac Catalina.
* A new Time Toolbar showing current record/playback time has been
split from the Selection Toolbar. It can be resized large.
* Presets for more effects can be imported and exported.
* A new Multi-View mode for tracks. In this mode both
spectrogram and waveform views are shown at the same time.
* Opus available as a new audio export format on Windows and Linux.
* Easier to convert labels between point labels and range labels.
* New Loudness Normalization effect.
* New RMS measurement analyzer.
* New Noise Gate effect.
* New Spectral Delete effect.
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.4.0
Bug Fixes
Over 100 bugs in 2.3.3 fixed, including:
* 2237 - Equalization effects have no Import or Export for curves
* 2261 - Graphic EQ sliders have no frequency labels
* 2265 - Track heights are reset to default on project re-opening
* 2303 - Playback does not start at the saved cursor position on reopening a saved project.
* 2314 - Zoom in fail when playing

Changes for v2.4.0 RC5 - v2.4.0 RC6

Improvements
* Audacity now runs on Mac Catalina.
* A new Time Toolbar showing current record/playback time has been
split from the Selection Toolbar. It can be resized large.
* Presets for more effects can be imported and exported.
* A new Multi-View mode for tracks. In this mode both
spectrogram and waveform views are shown at the same time.
* Opus available as a new audio export format on Windows and Linux.
* Easier to convert labels between point labels and range labels.
* New Loudness Normalization effect.
* New RMS measurement analyzer.
* New Noise Gate effect.
* New Spectral Delete effect

Changes for v2.3.3 RC2 - v2.3.3 RC3

Improvements
* Equalization effect now split into two effects, Filter Curve and Graphic EQ.
* Presets (using manage button) now active/working.
* Can now have two points at same frequency for steep steps.
* 'What you hear is what you get' for exports. Formerly the solo button
preferences could lead to differences in which tracks were exported.
* Leading silence (blank space) not skipped over in exports.
* Quality setting on AAC/M4A exports.
* Some confusing functionality removed (better achieved in other ways)
* Removed Nyquist Workbench (use built-in nyquist features)
* Removed Vocal Remover (use Vocal Reduction)
* Removed On-Demand aliased files (copy files instead)
* Removed 'Normalize on Load' (Normalize as needed on export, instead)
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.3
Bug Fixes
Over 150 bugs in 2.3.2 fixed, including:
* 2112 - Crash when opening Equalization settings in a Macro
* 2127 - Crash deleting a track while in Record/Pause state
* 2176 - Crash when attempting to time shift multiple tracks
* 2141 - Tabbing between labels stopped working
* 2200 - Refusal to export some large (4GB) files on size grounds

Changes for v2.3.2 - v2.3.3 RC2

Changes since version 2.3.2:
Improvements
* Equalization effect now split into two effects, Filter Curve and Graphic EQ.
* Presets (using manage button) now active/working.
* Can now have two points at same frequency for steep steps.
* 'What you hear is what you get' for exports. Formerly the solo button
preferences could lead to differences in which tracks were exported.
* Leading silence (blank space) not skipped over in exports.
* Quality setting on AAC/M4A exports.
* Some confusing functionality removed (better achieved in other ways)
* Removed Nyquist Workbench (use built-in nyquist features)
* Removed Vocal Remover (use Vocal Reduction)
* Removed On-Demand aliased files (copy files instead)
* Removed 'Normalize on Load' (Normalize as needed on export, instead)
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.3
Bug Fixes
Over 150 bugs in 2.3.2 fixed, including:
* 2112 - Crash when opening Equalization settings in a Macro
* 2127 - Crash deleting a track while in Record/Pause state
* 2176 - Crash when attempting to time shift multiple tracks
* 2141 - Tabbing between labels stopped working
* 2200 - Refusal to export some large (4GB) files on size grounds
See also: https://wiki.audacityteam.org/wiki/Release_Notes_2.3.3

Changes for v2.3.1 - v2.3.2

Improvements
* Audacity now includes the LAME mp3 encoder. Previously, due to now expired patents, you had to download it separately.
* There is a new 'Select' button in the track panel to select the whole track.
* Audacity mod-script-pipe for driving Audacity from Python now comes with Audacity and can be enabled via preferences.
* Options and preferences:
* Type to Create a Label is now off by default.
* A plug-in installer for Nyquist now provides a file browser for selecting '.NY' files to install.
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.1
Bug Fixes
Over 20 bugs in 2.3.1 fixed, including:
* Audacity 2.3.1 would crash if append-recording to a collapsed track.
* Many accessibility bugs on macOS fixed

Changes for v2.3.1 - v2.3.2 RC

Improvements
* Audacity now includes the LAME mp3 encoder. Previously, due to now expired
patents, you had to download it separately.
* There is a new 'Select' button in the track panel to select the whole
track.
* Audacity mod-script-pipe for driving Audacity from Python now comes with
Audacity and can be enabled via preferences.
* Options and preferences:
* Type to Create a Label is now off by default.
* A plug-in installer for Nyquist now provides a file browser for
selecting '.NY' files to install.
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.2
Bug Fixes
Over 20 bugs in 2.3.1 fixed, including:
* Audacity 2.3.1 would crash if append-recording to a collapsed track.
* Many accessibility bugs on macOS fixed

Changes for v2.3.0 - v2.3.1

Improvements
* Audacity now supports 64 bit Mac.
* Options and preferences:
* Microfades are now an opt-in feature. They were always on in 2.3.0.
* The advanced vertical zooming option is now available in the View->Zoom
menu.
* Regular interval labels now support range labels.
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.1
Bug Fixes
Over 20 bugs in 2.3.0 fixed, including:
* A crashing bug on Linux that made Audacity 2.3.0. unsuitable for Linux.
* Crash on Mac when right clicking on label.
* Problems with Change Pitch, including not remembering parameter values.

Changes for v2.3.0 - v2.3.1 RC3

Improvements
* Audacity now supports 64 bit Mac.
* Options and preferences:
* Microfades are now an opt-in feature. They were always on in 2.3.0.
* The advanced vertical zooming option is now available in the View->Zoom menu.
* Regular interval labels now support range labels.
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.1
Bug Fixes
Over 20 bugs in 2.3.0 fixed, including:
* A crashing bug on Linux that made Audacity 2.3.0. unsuitable for Linux.
* Crash on Mac when right clicking on label.
* Problems with Change Pitch, including not remembering parameter values.

Changes for v2.2.2 - v2.3.0

Improvements
* New feature - "Punch and Roll Recording".
* Pinned-play-head can now be repositioned by dragging
* Play-at-Speed now can be adjusted whilst playing.
* Toolbars controlling volume and speed can now be resized for greater precision
* Macros (formerly 'Chains') substantially extended
* New Macro palette
* Macros can be bound to keyboard keys
* New commands
* New 'Tools' menu
* New 'Scriptables' commands
* Nyquist gains AUD-DO command
* Nyquist effects are now translatable and translated
* More dialogs have help buttons now
* Increased legibility of trackname display
* Half-wave option for collapsed tracks
* Sliding Stretch
* Dialog (option) for entering labels
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.0
Bug Fixes
Over 90 bugs in 2.2.2 fixed, including:
* Windows: Queen Mary 1.7.1 Vamp plug-ins crash Audacity on opening Plug-in Manager - bug #1244
* Inconsistent behavior when recording with a selection defined - bug #1839
* Ctrl + M does not open label for editing - bug #1852
* Vertical Zoom in by clicking in the vertical Scale, or context menu, in waveform views is inconsistent - bug #1810
* Deletion of all tracks cannot be undone - bug #1845
* Timer Record with a selection present can get a truncated recording with data loss - bug #1851
* Duplicate shortcuts can be created - bug #1786
* Labels longer than 260 characters are now supported - bug #1905
* Using Spectrogram Settings in TCP or using Preferences causes Audacity to reset Project Rate to default rate in Quality Preferences - bug #1977
* Cut Preview should play all selected/sync-locked tracks, respecting Mute/Solo during preview - bug #231

Changes for v2.2.2 - v2.3.0 RC3

Improvements
* New feature - "Punch and Roll Recording".
* Pinned-play-head can now be repositioned by dragging
* Play-at-Speed now can be adjusted whilst playing.
* Toolbars controlling volume and speed can now be resized for greater precision
* Macros (formerly 'Chains') substantially extended
* New Macro palette
* Macros can be bound to keyboard keys
* New commands
* New 'Tools' menu
* New 'Scriptables' commands
* Nyquist gains AUD-DO command
* Nyquist effects are now translatable and translated
* More dialogs have help buttons now
* Increased legibility of trackname display
* Half-wave option for collapsed tracks
* Sliding Stretch
* Dialog (option) for entering labels
See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.0
Bug Fixes
Over 90 bugs in 2.2.2 fixed, including:
* Windows: Queen Mary 1.7.1 Vamp plug-ins crash Audacity on opening Plug-in Manager - bug #1244
* Inconsistent behavior when recording with a selection defined - bug #1839
* Ctrl + M does not open label for editing - bug #1852
* Vertical Zoom in by clicking in the vertical Scale, or context menu, in waveform views is inconsistent - bug #1810
* Deletion of all tracks cannot be undone - bug #1845
* Timer Record with a selection present can get a truncated recording with data loss - bug #1851
* Duplicate shortcuts can be created - bug #1786
* Labels longer than 260 characters are now supported - bug #1905
* Using Spectrogram Settings in TCP or using Preferences causes Audacity to reset Project Rate to default rate in Quality Preferences - bug #1977
* Cut Preview should play all selected/sync-locked tracks, respecting Mute/Solo during preview - bug #231

Changes for v2.2.2 - v2.3.0 RC2

Improvements
* New feature - "Punch and Roll Recording".
* Pinned-play-head can now be repositioned by dragging
* Play-at-Speed now can be adjusted whilst playing.
* Toolbars controlling volume and speed can now be resized for greater precision
* Macros (formerly 'Chains') substantially extended
* New Macro palette
* Macros can be bound to keyboard keys
* New commands
* New 'Tools' menu
* New 'Scriptables' commands
* Nyquist gains AUD-DO command
* Nyquist effects are now translatable and translated
* More dialogs have help buttons now
* Increased legibility of trackname display
* Half-wave option for collapsed tracks
* Sliding Stretch
* Dialog (option) for entering labels

Changes for v2.2.1 - v2.2.2

Improvements
* Dropout detection Dropout detection is controlled from a setting in Recording Preferences called "Detect dropouts". When this setting is "on" (default setting) Audacity will detect dropouts (brief gaps in the recording) and will insert zeroes into the recording to keep the other good parts synchronized. These silent spans will make the dropouts more obvious, but keep the duration of the recording correct. When recording stops, a Warning message box alerts the user and a label track, called "Dropouts", is added showing the lost parts, labeled with consecutive numbers.
* Improved horizontal zooming For this release we have improved the way zooming using your mouse wheel works and provided a new Zoom Toggle function.
* Improved vertical zooming We have added a context menu to the vertical scale to control vertical zooming Previous vertical zooming methods (left-click in the vertical ruler, left-drag in the vertical ruler) remain available by selecting "Advanced Vertical Zooming" in Track Behaviors Preferences.
* "Extra" menu The "Ext-Bar" and "Ext-Command" menus have been consolidated into the "Extra" menu.
* Theme tweaks The appearance and/or contrast of a few icons has been improved.
* Easier access to changing key bindings for shortcuts For menu commands that are enabled (not grayed-out) if you hold the Shift key and click on the sub-menu item, instead of executing the command the Keyboard Preferences pop open at the chosen command. You can then change that (or any other) shortcut binding.
* Language selection in Preferences Interface Preferences has been upgraded so when selecting languages the proper spelling of these languages is shown with accented and special characters.
Bug Fixes
* Multiple use of "Save As" to the existing open project can result in data corruption/loss
* Crash undoing during record, using Discard button of History window
* Exporting audio in compressed formats to device with insufficient space produces inconsistent/truncated results
* In Export Multiple, Cancel does not remove the file that is in progress when Cancel is chosen
* Unicode page encodings fixed ( ° °)
* Crash using SBSMS pitch change at low sample rate
* (Mac) Equalization: "Telephone" curve displays a flat line, no sound on Preview
* Toolbars: open undocked if previously not shown, unless Reset Toolbars first
* Analysis effects that create labels should give focus to label track
* Control value may be out of range when using FloatingPointValidator
* Analysis effects produce false indication that a label is open for editing
* Import Uncompressed File Dialog Incorrect Reference to Menu Item
* Wave Color not grayed out in TCP dropdown menu when in Spectrogram view
* Hover indication on note track channel toggle appears on all tracks (when they rerender)
* Installer has old logo for 2.2.1 and 2.2.0

Changes for v2.2.1 - v2.2.2 Beta

Improvements
* Dropout detection Dropout detection is controlled from a setting in Recording Preferences called "Detect dropouts". When this setting is "on" (default setting) Audacity will detect dropouts (brief gaps in the recording) and will insert zeroes into the recording to keep the other good parts synchronized. These silent spans will make the dropouts more obvious, but keep the duration of the recording correct. When recording stops, a Warning message box alerts the user and a label track, called "Dropouts", is added showing the lost parts, labeled with consecutive numbers.
* Improved horizontal zooming For this release we have improved the way zooming using your mouse wheel works and provided a new Zoom Toggle function.
* Improved vertical zooming We have added a context menu to the vertical scale to control vertical zooming Previous vertical zooming methods (left-click in the vertical ruler, left-drag in the vertical ruler) remain available by selecting "Advanced Vertical Zooming" in Track Behaviors Preferences.
* "Extra" menu The "Ext-Bar" and "Ext-Command" menus have been consolidated into the "Extra" menu.
* Theme tweaks The appearance and/or contrast of a few icons has been improved.
* Easier access to changing key bindings for shortcuts For menu commands that are enabled (not grayed-out) if you hold the Shift key and click on the sub-menu item, instead of executing the command the Keyboard Preferences pop open at the chosen command. You can then change that (or any other) shortcut binding.
* Language selection in Preferences Interface Preferences has been upgraded so when selecting languages the proper spelling of these languages is shown with accented and special characters.
Bug Fixes
* Multiple use of "Save As" to the existing open project can result in data corruption/loss
* Crash undoing during record, using Discard button of History window
* Exporting audio in compressed formats to device with insufficient space produces inconsistent/truncated results
* In Export Multiple, Cancel does not remove the file that is in progress when Cancel is chosen
* Unicode page encodings fixed ( ° °)
* Crash using SBSMS pitch change at low sample rate
* (Mac) Equalization: "Telephone" curve displays a flat line, no sound on Preview
* Toolbars: open undocked if previously not shown, unless Reset Toolbars first
* Analysis effects that create labels should give focus to label track
* Control value may be out of range when using FloatingPointValidator
* Analysis effects produce false indication that a label is open for editing
* Import Uncompressed File Dialog Incorrect Reference to Menu Item
* Wave Color not grayed out in TCP dropdown menu when in Spectrogram view
* Hover indication on note track channel toggle appears on all tracks (when they rerender)
* Installer has old logo for 2.2.1 and 2.2.0

Changes for v2.2.1 RC2 - v2.2.1 RC3

Improvements
* Waveform colorways
You can optionally change the colorway of the waveforms displayed in your project.
The setting is per track and not per project so you can have multiple colorways
in the same project.
* "Save Other" reverts to "Export" in the File menu
When we made the menu changes for 2.2.0 we introduced an entry into the File menu
called "Save Other" which led to a sub-menu for exporting various audio formats.
Many users were confused by this change and found it hard to find where they could
export audio from. So for 2.2.1 we have changed that menu entry to be File > Export.
Bug Fixes
* Release 2.2.1 is mainly a maintenance release.
Soon after the release of 2.2.0 we discovered some problematical bugs in Audacity:
Bug #1767 - Opening a second project from Mac's Finder produces a second
inaccessible instance of Audacity
Bug #1770 - Crash applying certain chain files
Bug #1783 - Preview fails when selection extends before zero
Bug #1787 - Auto-scroll stopped working in 2.2.0
Bug #1765 - Using File > Open to import audio gives wrong zoom level
and no scroll bar slider

Changes for v2.1.3 - v2.2.0

Improvements
* Four Selectable themes provided, with new 'Light' theme as default, plus option to customize
* Many menu changes:
* Menus Reorganized
* Extended menu bar provided
* New keyboard commands for working with clips
* Help buttons ? in Preferences, Effects, Generators and Analyzers - and other places
* Non-Graying out of effects when no selection (and explanatory dialog with help button)
* Playback of MIDI (and Allegro) files imported into Note Tracks is now available.
* 'Center' option in Selection Toolbar
* Stem plots
* Major overhaul to documentation/manual including many new images and streamlined text on landing pages for in-program help.
Other Changes
* Append-record is now the default (use Shift + Record for old behavior,
to record on a new track)
* The Esc key now cancels all click-and-drag actions. It also chooses among overlapping mouse click targets, which is especially useful in the Multi-Tool.
* Sync-Lock button removed (use menu item or keyboard shortcut instead)
* New preferences and preference pages
* Overhaul of much code:
* Overhaul of envelope handling code to deal with some anomalies
* Overhaul of exception handling for greater safety
* New Logo
Bug Fixes
* Major work on bug fixing. 198 bugs that were in 2.1.3 were fixed for 2.2.0.
* The most serious bug fixed this time round was bug 437 which was about what happens when Audacity is recording and runs out of storage.
* Most of the bugs fixed were more minor, such as bug 463 which was about a case in which the numbering on the timeline could display
incorrect times.

Changes for v2.1.2 - v2.1.3

Changes and Improvements:
* Interface:
* (macOS) Support for horizontal scroll on Magic Mouse / Trackpad and for Trackpad pinch/expand zoom gesture.
* Pinned option on waveform so waveform moves and recording/playing head stays still.
* Timer Record options to save/export/exit after recording.
* Scrub Ruler and optional Scrub Toolbar.
* New shortcuts ALT+RIGHT and ALT+LEFT (move to labels without editing).
* Effects:
* Effects no longer grayed out when paused.
* New Distortion effect (replaces Leveller).
* SBSMS (higher quality but slower) option on Change Tempo / Change Pitch effects.
* New Rhythm Track generator (replaces Click Track).
* New Generator for Sample Data Import.
* Nyquist effects now significantly faster.
* Other Changes:
* Upgraded the PortAudio library to v19 rev r1966. This gives Audacity Windows 10 support.
* (macOS) Audacity.app now has its resources inside it rather than in a separate folder, so installation to /Applications/ is cleaner.

Changes for v2.1.2 - v2.1.3 RC1

Changes and Improvements:
* Interface:
* (macOS) Support for horizontal scroll on Magic Mouse / Trackpad and for Trackpad pinch/expand zoom gesture.
* Pinned option on waveform so waveform moves and recording/playing head stays still.
* Timer Record options to save/export/exit after recording.
* Scrub Ruler and optional Scrub Toolbar.
* New shortcuts ALT+RIGHT and ALT+LEFT (move to labels without editing).
* Effects:
* Effects no longer grayed out when paused.
* New Distortion effect (replaces Leveller).
* SBSMS (higher quality but slower) option on Change Tempo / Change Pitch effects.
* New Rhythm Track generator (replaces Click Track).
* New Generator for Sample Data Import.
* Nyquist effects now significantly faster.
* Other Changes:
* Upgraded the PortAudio library to v19 rev r1966. This gives Audacity Windows 10 support.
* (macOS) Audacity 2.1.3 provides partial support for Sierra. Details at http://wiki.audacityteam.org/wiki/Partial_Support_for_Mac_Sierra_in_2.1.3
Bug fixes:
Over 60 bugs fixed, including five longstanding bugs.

Changes for v2.1.1 - v2.1.2 RC3

Changes and Improvements:
* Interface:
* Spectrogram settings are now available per track.
* Clearer (sharper) display of pitch (EAC).
* New 'Spectral Reassignment' option in spectrogram. Good for vocal work.
* Other Changes:
* Upgraded the wxWidgets library from wx 2.8.12 to wx 3.0.2. This is
the main change in this release.
Bug fixes:
* Crashes
* Crash using 'space' in Selection toolbar context menu fixed.
* Crash setting equalization effect parameters in chains fixed.
* Crash when pressing both mouse buttons over toolbar buttons fixed.
* (Rare) crash or freeze in sound activated recording fixed.
* (Rare) crash on using plot spectrum for first time fixed.
* Interface
* Equalization effect settings are now saved.
* Oversized Export Options window (FFmpeg) now OK on smaller screens
* FLAC import/export fast again.
* Can now set undefined frequency in Spectral Selection bar.
* Imported presets on custom FFmpeg export fixed.
* Text input boxes working with VAMP
* Keyboard playback commands now work again.
* Import Raw Data now works when in Polish language.
* Mac OS X
* Mouse preference bindings now show 'command', not 'ctrl'

Changes for v2.0.6 - v2.1.0

Changes and Improvements:
* Effects:
* LADSPA, VST and Audio Unit (OS X) effects now support real-time preview,
save/load of user presets and saving effect settings across sessions.
Note: Real-time preview does not yet support latency compensation.
* VST effects now support import/export of FXB preset banks.
* Shell VST effects that host multiple plugins are now supported.
* All Effect Menu items (built-in or plugin) can now be used in a Chain.
* Items in the Effect, Generate or Analyze Menus can be sorted or grouped
by name, publisher or class of effect.
* Noise Removal is improved and renamed to "Noise Reduction".
* Change Speed has new time controls for current and new length. You can
now enter the speed change as a multiplier e.g. "2" is twice as fast.
* New "Crossfade Tracks" effect can be used for crossfading two tracks.
This replaces Cross Fade In and Cross Fade Out.
* Nyquist Prompt and most shipped Nyquist effects now have Preview button.
* Interface:
* Redesigned Meter Toolbars: The default shows separate Record and Playback
Meters, half-height so they can be wider while docked, in gradient style.
* A frequency selection can now be made (and spectral edit effects applied
to those frequencies) when in a spectrogram view. You can also create
or adjust frequency selections in a new "Spectral Selection Toolbar"
(available at View > Toolbars).
* Transcription Toolbar (Play-at-speed) can now loop play and cut-preview.
* Timer Record now saves recordings automatically into an existing project.
* New Armenian translation.
* Operating system and sound device support:
* (Windows) Audacity 2.1.0 requires Windows XP SP3 (32-bit) or XP SP2
(64-bit), Vista, Windows 7, Windows 8 or 8.1.
* (Windows) Audacity is now compiled using Visual Studio 2013.
* (Windows) Recording with WASAPI host now includes experimental support
for physical inputs (up to 24-bit depth) as well as loopback recording.
* (OS X) 10.10 (Yosemite) is now supported including Apple Audio Units.
* Please report any issues with WASAPI recording/playback or Yosemite
to http://audacity.sourceforge.net/contact/#feedback .
* (Linux Ubuntu) Under Unity, keyboard shortcuts are not visible in the
Audacity menus. Keyboard shortcuts are visible if you install the classic
GNOME Flashback interface or under Unity if you open Audacity with the
UBUNTU_MENUPROXY=0 environment variable. Audacity compiled from source
will ship with src/audacity.desktop.in set to UBUNTU_MENUPROXY=0 but it
will remain up to distributions to use this desktop file.
Bug fixes:
* Interface:
* Typing "j" or "k" in a label track activated the "move cursor" shortcut.
* Spectrogram log (f) view displayed incorrectly until vertically zoomed.
* Fixed crash after zooming out on vertical scale beyond +/-1.0.
* Selections made with Selection Toolbar were not restored after Undo.
* Undo could fail silently if a selection included/touched a clip boundary.
* Imports and Exports
* If there were invalid FFmpeg libs in system PATH this prevented Audacity
recognising the installed FFmpeg or the FFmpeg specified in audacity.cfg.
* Mac OS X:
* Fix uninitialized buffer - this should correct playback buzz or crackle
where the upper of multiple tracks started with or contained white space.
* Device names were corrupted when using system language other than English.
* Fixed crashes using (external program).
* Waves v9 Audio Units should now work correctly.
* GNU/Linux:
* Fix "Audacity already running" error when using the command-line or
context menu to open multiple or further files.
* Fix segfault exporting an FFmpeg format to an unwritable folder.
* Fix silent failure exporting FFmpeg, MP2 or OGG to an unwritable folder.
* Fix ENTER activated an effect when OK button was greyed out.
* Addendum:
* The previous Audacity 2.0.6 version fixed an issue that projects did not
reopen correctly if they contained tracks having 2^31 samples or greater
of audio (just over 13.5 hours at 44100 Hz).

Changes for v2.0.5 - v2.0.6

Improvements:
better user interface for Keyboard Preferences
streamlining of several Menus
LV2 now supported on all platforms, and improved VST settings interface
translations updated, including adding Tamil language
other improvements, including to import/export and ease of installation on Mac OS X
Bug Fixes:
user interface bug fixes to Region Restore, dragging selections, and many others
effects bug fixes to add missing effects to Chains, fix accuracy of Analyze > Contrast, fix accuracy of Noise Removal attack and decay, and improve speed of Nyquist effects on OS X and Linux
other bug fixes to Timeline after Loop Play, Transcription Toolbar, and Linux build issues

Changes for v2.0.4 - v2.0.5

http://wiki.audacityteam.org/wiki/Release_Notes_2.0.5

Changes for v2.0.2 - v2.0.3

Bug fixes
General
Crash using Undo whilst time-shifting a track.
Crash using Repair if the selection extended into an empty track.
Export Multiple didn't prevent export if there was no audio or all audio was muted. This allowed export of small invalid files.
Time Track
Loop Play of a speeded-up track inserted silence.
Playback and rendering was significantly inaccurate, creating audible and visual glitches.
Accessibility
The mnemonics character "&" was read out by screen readers in most of the Preferences choices.
NVDA did not read static text in most dialogs. Text can now be read by using INSERT + B.
JAWS and Window-eyes misread the "Duration" control in Silence Generator.
Toolbar buttons could not be pressed by ENTER
Other interface bug fixes.
Changes and Improvements
Resampling
The SoX Resampler library (libsoxr) has replaced libresample in Audacity releases, offering both higher quality and greater speed. .
Time Tracks new features
"Set Range" now changes only the range of the Time Track, preserving the pitch/speed set by any existing warp points.
Vertical scale added with options for linear and logarithmic display and interpolation.
Upper and lower speed limits will now be remembered when saving and reopening a project in 2.0.3. Warp points in projects saved by previous Audacity versions will be correctly restored in 2.0.3.
Warp points saved in a 2.0.3 project will be preserved if opened in previous versions but playback and display will be incorrect.
New effects
Studio Fade Out (uses a filtered "S" curve).
Adjustable Fade (accessible effect for creating partial fades and adjustable fade shapes).
Bass and Treble (replaces Bass Boost).
General
Real sample rates up to 384000 Hz are now supported for playback and recording in high resolution devices (the maximum is up to 192000 Hz for Windows DirectSound host).
Labeled Regions in Edit Menu is renamed to "Labeled Audio" and now allows splits to be placed at point labels. Labeled audio regions that touch without overlapping are treated as separate regions. Overlapping labeled audio regions are treated as a single region.
New Croatian translation of Audacity.
Compilation
CMake is required in order to build libsoxr.

Changes for v2.0.1 - v2.0.2

Bug fixes
Interface
"Retain labels" Interface Preference did not retain labels for a region that snapped exactly to both label edges.
Projects did not save the track selected state.
(OS X, Linux) Timer Record: Interlinking of the Start, End and Duration controls was broken.
(Windows) JAWS screen-reader did not read the "Draw curves" and "Graphic EQ" radio buttons in Equalization correctly.
Envelopes and Clips
Exporting (or any render operation) on a track containing split lines could create clicks at the split lines.
Effects and Analysis
Normalize could crash if the track name contained "%".
Changes and Improvements
Duration controls when generating at a point now default to hh:mm:ss + milliseconds format. Selection Toolbar also defaults to that format on first installation or resetting preferences.
Toolbars visual improvements: "Snap To" in Selection Toolbar now has an explanatory tooltip
Device Toolbar tooltips now display the selected device
Increased default width of Device Toolbar and Meter Toolbar.
Improvements and some bug fixes to Nyquist effects, including: Delay (new option to prevent duration change)
Sample Data Export (new "L-R on Same Line" layout option)
Risset Drum (new "Amplitude" slider).
Importing a labels file writes the file name to the name of the Label Track, and exporting a labels file offers the name of the last Label Track in the project.
Removed the "Audio cache" option from Directories Preferences due to frequent crash reports. All data operations will now be written to disk and not to RAM.
Removed the FFmpeg "On-Demand" option from Libraries Preferences (this fixes Audacity not building if configured --without-ffmpeg).
Compilation: Progress on making the Modules feature mainstream. Modules can now be individually enabled and disabled in Preferences.

Changes for v2.0 - v2.0.1

Bug fixes
Interface Selection Toolbar: a value for the previous whole second displayed if the value was close to a whole second.
Finding zero crossings could cause the selection to expand into white space at either side of the clip.
Clips did not drag to another track if mouse was over a selection.
Mixer Board: Rendering four tracks resulted in a redundant Track Strip followed by a crash.
Imports, Exports and Files
Exporting to WAV or AIFF led to a "Libsndfile says" error or corrupted output due to order of metadata in imported files.
(Mac) Fixed crashes importing MP3 files on PPC machines.
(Linux Ubuntu) .Aup files could not be associated with Audacity (they opened in the web browser instead).
Effects and Analysis
Normalize: Fixed issues where normalization could be to wrong value if applied with DC offset correction, or if applied to "read-directly" WAV and AIFF files before On-Demand completed.
Sliding Time Scale: fixed an audible discontinuity at the beginning of the processed selection; fixed a serious quality problem on Linux 64-bit.
Other miscellaneous bug fixes
including fix to prevent zooming with mouse wheel or ball scrolling the content off-screen.
Changes and Improvements
Shortcuts can now be added in Keyboard Preferences to items in the Generate, Effect or Analyze menus, including user-added plug-ins.
Nyquist Effect plug-ins can now be added to Chains.
New "Paulstretch" effect for extreme slowdown without pitch change.
New "Sample Data Export" Analyze effect for exporting a file containing amplitude values for each sample in the selection.
New Preference (off by default) to import files On-Demand (without seek ability) when using the optional FFmpeg library.
New Preference (off by default) to retain labels when deleting a selection that snaps to the label without extending past it.
(Windows installer) New option to reset Preferences on next launch.
(Mac) Audacity now has excellent compatibility with the VoiceOver screen reader. For details, please see http://manual.audacityteam.org/help/manual/man/accessibility.html#mac.
CleanSpeech Mode (no longer supported) will not now be enabled even if it was enabled by an earlier version of Audacity.
Added Serbian (Latin and Cyrillic) translations.

Changes for v1.2.6 - v2.0

Some of the major changes in 2.0.0 over 1.2.6 are:
Many effects significantly improved, especially Equalization, Noise Removal and Normalize. Vocal Remover now included plus GVerb on Windows and Mac. VAMP analysis plug-ins now supported.
Improved label tracks with Sync-Lock Tracks feature in the Tracks Menu. Multiple clips per track. Tracks and selections can be fully manipulated using the keyboard. Many more keyboard shortcuts.
New Device Toolbar to manage inputs and outputs. Timer Record feature. New Mixer Board view with per-track VU meters.
Automatic Crash Recovery in the event of abnormal program termination.
Fast "On-Demand" import of WAV/AIFF files if read directly from source. FLAC now fully supported. Added support for optional FFmpeg library for import/export of AC3/M4A/WMA and import of audio from video files.

Changes for v1.3.13 Beta - v1.3.14 Beta

Interface:
Excessive delay occurred when typing into labels in long projects.
Last digit of TimeText controls could not be manipulated in some formats.
(Windows, OS X) Play and Record shortcuts did not work after clicking in Device Toolbar.
(OS X, Linux) Crash occurred if Toolbars were reset during playback or recording.
Imports and Exports:
MP2 files were not importable without FFmpeg library or an import rule.
Files that could only be imported using FFmpeg imported as noise with no error message if FFmpeg was not available.
Files containing PCM audio but an incorrect extension (such as MP3) caused a freeze.
Effects and Analysis:
An empty command could be added to a Chain which then displayed a Nyquist error message when run.
Plot Spectrum didn't preserve signal level if multiple tracks were analyzed.
Other bug fixes:
Audacity has been provisionally fixed so that it can no longer create block files longer than the sample format or project format allows, and can no longer delete these, which led to data loss. Any overlong blocks found are preserved but "orphaned", so will appear as silence.
Orphan block files were wrongly reported if cutting or copying to the clipboard then reopening the project in the same session.
Fixed some crashes and incorrect movement of audio when dragging tracks.
(Windows) Data loss is now prevented when encountering a corrupted .aup file created in ANSI builds.
(Linux) Restore building if USE_PORTMIXER is not defined.
Changes and Improvements:
Normalize: Faster processing and improved interface. Left-right balance in unsplit stereo tracks is now preserved by default, with a checkbox option provided to process stereo channels independently.
Spectrograms now allow window sizes up to 32768 and frequencies up to half the sample rate (the maximum possible).
Mix and Render now preserves clip length by not rendering white space between time zero and first audio, and preserves audio before time zero. To retain silence before the audio starts, generate silence after render.
Grouped some Edit Menu items into "Remove Audio" and "Clip Boundaries".
CleanSpeech Mode removed from Interface Preferences (it still runs if it was enabled in a previous Audacity but can only be turned off there).
(OS X) Added support for AudioUnit MusicEffects (but no MIDI support).
(Linux) Set the per-user files directory per the program name set in configure.
(Linux) Changed the default location of the Audacity temporary directory to be in /var/tmp not /tmp, so preserving the directory between reboots.

Changes for v1.3.11 Beta - v1.3.12 Beta

Bug fixes for:
Cutting or deleting a region in the waveform and label track did not move the labels in advance of the cut
Incorrect behavior snapping to labels and boundaries with Snap To enabled
Projects froze if files imported via On-Demand were no longer available
(Windows 7) Clicking in a file open or save dialog caused files or folders to disappear from the list, and file filtering was broken
Other import/export, effects and crash fixes
Changes and Improvements:
A hover tooltip is now provided if the Mixer Toolbar input selector cannot control the system slider for the selected input
More intuitive behavior when moving and resizing labels by dragging
Export Multiple: new option to use a numerical prefix before existing label or track names
New Equalization preset "Inverse RIAA", with new button to invert other curves
New Preferences choice for "System" language which is used on first run instead of asking user to choose language

Changes for v1.3.10 Beta - v1.3.11 Beta

Bug fixes for:
Too much audio exported when exporting partial selections
Exports via FFmpeg corrupted if included metadata; M4A now supports metadata export
Nyquist plug-ins did not add labels to an existing label track
Crash opening Preferences when no audio devices available
Timer Record and Sound Activated Recording bugs
(Windows) Installer now installs correctly over previous Audacity versions
Miscellaneous crashes and interface issues
Improvements:
(Windows) Higher resolution icon file
New Sound Finder plug-in for labelling regions of audio

Changes for v1.3.9 Beta - v1.3.10 Beta

Bug fixes for:
Imports and Exports:
Freeze importing audio files when Default View Mode set to Pitch (EAC)
Simultaneous On-Demand imports sorted incorrectly
WAV or AIFF files imported as noise if Preferences set to copy in the data at 24-bit quality
WMA exports corrupted if they contained metadata
Metadata Editor appeared before the Export window when exporting to any format
Effects:
Crash or hang using Equalization on longer tracks
Reverse did not reverse clip boundaries
Nyquist:
Excessive memory consumption led to slow processing or crashes
Values appearing in text boxes not always the default or previously entered values
Errors running in European locales where comma used as decimal separator
VST effects remained in Effect menu even when re-scanned and no longer available
Truncate Silence produced incorrect results if silences spanned a block boundary
Other bug fixes:
Spurious "not writable/disk full" errors when saving projects
Playing, rendering or exporting multiple tracks led to desynchronized playback or loss of audio data
Crash opening Preferences when no recording and/or playback devices enabled or connected
Preferences window: OK button did not respond to ENTER when a tab selected in left-hand panel
Mixer Board solo button handling
(Windows) After a period launching correctly, Audacity sometimes did not come up on top at launch
(Mac OS X) Correctly installed Help folder could not be found
(Mac OS X and Linux) Output slider could affect VU playback meter which then did not reflect actual waveform volume level
(Linux) Undoing or redoing a label edit could cause a crash
Changes and improvements:
Linked audio and label tracks disabled until a future Beta version so they can be bug fixed
Input volume slider will be disabled if it doesn't have proper control of system slider; use the system slider instead
Proper support for copying/pasting label-with-audio including label text; new Edit > Paste Text to New Label menu item to paste system clipboard
Contrast Tool now modeless, more intuitive handling of multiple project windows, various other minor improvements

Changes for v1.3.6 - v1.3.7 Beta

Cross-platform Bug Fixes:
Muting/soloing caused incorrect channel results in exported stereo files
Noise Removal and all Nyquist effects pasted the original unmodified audio at the end of the modified region
Noise Removal inserted a tail of low level noise at the end of the modified region
Nyquist and Compressor plug-ins did not display moving bars in progress dialogue and over-estimated "Remaining Time"
Cancelling Nyquist effects deleted unprocessed audio
Change Speed and Change Tempo failed to modify the original selection length
Cut lines invisible
Fixed various bugs importing multi-stream files via FFmpeg
File > Export as WAV could be corrupted if overwriting an imported WAV read direct from the file
Export multiple "Other uncompressed files" choice always produced 16-bit PCM audio irrespective of chosen options.
MP3 export usually produced a 128 kbps constant bit rate file irrespective of chosen options; reported length often incorrect
MP3 ID3 Genre tag misread on import if the genre list in Metadata Editor was opened and saved
Exported metadata tags in MP3, OGG and FLAC often not seen by player software - now substantially improved
WMA exports (via FFmpeg)corrupted if metadata tags included
Some multi-channel recording devices that previously recorded more than two channels no longer did so
Generated audio did not fit in window
No warning was given when saving an empty project
Beep on completing longer process did not work on many systems
fixed crashes importing lists of files (.LOF), in Meter Toolbar and Change Speed
Platform-specific Bug Fixes:
Windows Vista: crash opening Preferences with no sound devices enabled and connected
Mac OS X and Linux:
Spurious clipping at start of playback
Labels did not accept certain legal characters
Shortcuts did not work after running effects
Project Rate did not change to respect rate of first imported file if that rate was unsupported
Mac OS X only:
Crash resizing project window
Menu items became inactive or visibly corrupted
File > Open dialogue did not always work on OS X 10.4
Impossible to set independent Command and Control shortcuts that shared the same key
Freeze importing uncompressed files via On-Demand (please report any remaining instances of this to: feedback@audacityteam.org)
Portable settings were not picked up, instead settings were taken from the default location
Fixed unavailability of FFmpeg installer
New Features:
F11 Full Screen mode
High-quality "Sliding Time Scale/Pitch Shift" effect
Audio Contrast Analyzer for testing audio on the internet for WCAG2 accessibility compliance.
Windows: sound devices can now be opened using the more efficient DirectSound API
Other changes:
Latency correction should be improved for many users by employing a fixed rather than variable correction
Grouping of Effects into categories turned off until a way is added for users to do so themselves
Numerous minor interface improvements such as Metadata Editor navigation, new "hh:mm:ss + hundredths" selection format
Note: Windows users wanting to export MP3 files will require the latest version of the LAME encoder from http://lame.buanzo.com.ar/

Changes for v1.3.6 RC1 - v1.3.6

Interface:
"Save Compressed Copy of Project" saves in much smaller .OGG format to facilitate online transmission of projects
Improved MIDI import and export routines, and clearer color for selection region
Default temporary directory on Mac now accessible in Finder
Import / Export:
Stability improvements in on-demand loading
FFmpeg: support for latest version of library, improved version checks and error messages, stability improvements in custom exporter
Bug Fixes:
Crash in "Get Noise Profile" step of Noise Removal at project rates below 20480 Hz.
Underestimation of peak level in tracks with a small number of different peaks
Truncate Silence could result in repeated or lost audio if applied to the whole of a track
Other interface, generating, exporting and platform-specific fixes
Compilation:
Added autoconf macro archive to CVS, enabling
.nix users without this archive to build --with -MIDI

Changes for v1.3.5 Beta - v1.3.6 RC1

release candidate 1: final is pending

Changes for v1.3.4 Beta - v1.3.5 Beta

Recording / Playback:
Several bugs fixed so that latency correction should be better, and more devices work correctly. Problems with invalid sample rates under Linux should be much rarer.
Newer version of Portaudio library.
New feature to record onto the end of an existing track (hold Shift while clicking Record).
Import / Export:
Updated versions of Libogg, Libvorbis, Libflac, Libsndfile and Twolame libraries.
Handling of unsupported file formats more informative.
Handling of file names with slashes on OS X improved. New dialog allows replacement of illegal file name characters on all platforms.
Interface:
Improved scaling and layout for rulers and VU meters.
Envelope fixes/improvements including full control of undo/redo.
New keyboard shortcuts and improved menu navigation.
Preferences: More intuitive tab arrangement. New options for mute/solo and Metadata Editor behavior. Language can now be changed without restart.
Expanded Build Information tab.
Effects:
New Vocal Remover plug-in, improvements for Generate effects.
Compilation:
Fixes when building Audacity with libraries disabled.
Improvements to make Mac and Solaris builds easier.
Security:
Full fix for issue CVE-2007-6061 on systems where temporary directories can be changed by other users (thanks to Michael Schwendt).
Miscellaneous:
Updated translations for many locales.
Several stability improvements.

Changes for v1.3.3 Beta - v1.3.4 Beta

New Welcome Screen with introduction to Audacity.
Enhanced Windows Shell integration, so Audacity shows up in lots of Windows places such as "Open With".
New keyboard command: 'Mix and Render to New Track' (bound to Ctrl+Shift+M).
New keyboard shortcut: "Shift-A" starts playback when stopped, or performs "Stop and Select" when playing.
Added support for VAMP audio analysis plug-ins.
Solo button solos only one track at a time, and a track cannot be both mute and solo. Interface:
Keyboard shortcuts for making short/long jumps along the timeline.
Added 'Snap To' in the Selection Bar.
Made keyboard navigation easier when multiple menu items with the same first letter exist.
Enhanced interface for label editing.
Layout of OK/Cancel buttons consistency improved.
Preferences:
"Select all audio in project, if none selected" (on by default).
"Beep on completion of longer activities" (system bell, not main output).
Other preferences cleaned up and explanations improved.
Envelopes: Many fixes when copying / pasting / repeating.
Many translation updates.
Track height fixed in several cases.
CleanSpeech mode switching without closing and re-opening fixed. Opening/saving formats:
Metadata editor added for OGG, FLAC and WAV/AIFF exports, and general improvements in this area.
mport of metadata improved.
Muted tracks are no longer audible in the exported mix. Effects:
Truncate Silence: support for multiple and stereo tracks.
Dtmf Generator:
Added support for keypad letters.
Added an amplitude control.
Compressor: Variable decay time added.
Equalization:
Clicks at start/end prevented
Improvements to saved curves being found
Preview works correctly
'Merge' command appears in Undo history.
Clipping detected more reliably.
Nyquist plug-ins reviewed and enhanced.
Better (and more) progress bars.
Canceling effect always restores previous audio.
Several improvement to effects in batch mode. Recording / Playback:
Improvements to latency correction.
Updated version of portaudio-v19 library. Note that Help is no longer built in, but accessible on the Web via links in Audacity.

Version history for Audacity for Windows

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