Audacity

* FFmpeg support (downloadable separately) permits import and export of a much wider range of file formats, including WMA, M4A and AC3, plus import of audio from video files
* On-demand loading of uncompressed files eliminates the wait before files can be played or edited
* Linked audio and label tracks allow labels to move with their corresponding audio when cutting, pasting or changing speed or tempo
* Hierarchical plug-in grouping for built-in plug-ins

- New features
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.
Metadata import 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.
Cancelling 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.

Changes in 1.3.2 and 1.3.3:

Opening/saving formats:
* Import of audio from QuickTime (mov, aac, m4a) files is now
supported on OSX
* Metadata may be added to OGG files
* Improved export option selection
* Importing of Broadcast Wave Format (BWF) wave files now tolerated
* Additional export options added to MP3 and FLAC file formats
* Command line exporter now supported on Windows and OSX

Effects:
* EQ effect responsiveness improved
* Several enhancements to the EQ Effect
* Batch support added for the EQ effect
* New Auto Duck effect
* Added previewing to AudioUnit effects
* Much improved Noise Removal effect
* Effects previewing may now be canceled
* New DTMF Tone Generator effect
* Additional options available in Noise effect
* Improved the Tone Generation effects

Other features:
* New built-in screen capture utility
* Major speed improvement in Spectrogram rendering
* Increased support for drag and drop on OSX
* Support added for building against wxWidgets 2.8
* Support opening multiple Audacity Projects at once from Explorer on
Windows
* Improved main window sliders
* New support for snapping while selecting and sliding
* Improved track focus handling and visual feedback
* Speed improvements and handling of resizing/zooming in tracks
* Spectrum view may now be zoomed
* New internal file cache to improve handling of project files over
networks

Also:
* Many improvements to language specific translations
* Numerous stability improvements