Audacity is a free, easy-to-use audio editor and recorder for Windows, Mac OS X, GNU/Linux, and other operating systems. You can use Audacity to:
- Record live audio.
- Convert tapes and records into digital recordings or CDs.
- Edit Ogg Vorbis, MP3, and WAV sound files.
- Cut, copy, splice, and mix sounds together.
- Change the speed or pitch of a recording.
- Import and export WAV, AIFF, AU, and Ogg Vorbis files.
- Import MPEG audio (including MP2 and MP3 files) with libmad.
- Export MP3s with the optional LAME MP3 encoder library.
- Create WAV or AIFF files suitable for burning to CD.
- Import and export all file formats supported by libsndfile.
- Open raw (headerless) audio files using the Import Raw command.
It supports all common editing operations, plus it will mix tracks and let you apply plug-in effects to any part of a sound. It also has a built-in amplitude envelope editor, a customizable spectrogram mode and a frequency analysis window for audio analysis applications.
What's New in version 1.3.11 Beta:
Imports/Exports bug fixes:
- Bug when exporting partial selections caused too much audio to be exported is fixed
- Fix corrupt files exported through FFmpeg when metadata included (metadata is now exported correctly in M4A files)
- Prevent saving a new Audacity Project over an existing one as this could corrupt both projects
- Improved help for files that cannot be imported because the relevant optional library is missing
Effects:
- Allow effects which change the length of the audio they work on to also be applied to selected label tracks, thus keeping them synchronized
- Fixed inability in Nyquist plug-ins to add labels to an existing label track
- (Mac) Equalization window was corrupted after Preview
- (Linux 64-bit) Fixed crash Generating Click Track
Audio Devices:
- Fixed bug causing recording to stop short when the recording sample rate is not supported by the sound device and libsamplerate is used for resampling
- Fix crash when opening Preferences on a machine where there are no available audio devices
- Fixes for bugs using Timer Record and Sound Activated Recording
User Interface:
- Sizes of some dialogs adjusted to ensure they fit on the screen
- Fix for supposedly "hidden" items appearing on screen with large monitors
- Various keyboard shortcut and translation fixes
Other bug fixes:
- Several timing-dependent crashes and minor incorrect behaviours have been fixed
- Windows installer now installs correctly over previous versions of Audacity
Changes and Improvements:
- (Windows) Better icon file with higher resolution and transparency
- New SoundFinder plug-in to label regions of audio between silences, so allowing silences between tracks to be excluded when exporting multiple
10.94 M (file size)
Price: Free 
