Audacity project 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.
� And more! See the complete list of features below.

Here are some key features of "Audacity":

Recording:

· Audacity can record live audio through a microphone or mixer, or digitize recordings from cassette tapes, vinyl records, or minidiscs. With some sound cards, it can also capture streaming audio.
· Record from microphone, line input, or other sources.
· Dub over existing tracks to create multi-track recordings.
· Record up to 16 channels at once (requires multi-channel hardware).
· Level meters can monitor volume levels before, during, and after recording.
Import and Export:
· Import sound files, edit them, and combine them with other files or new recordings.

Export your recordings in several common file formats:

· 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 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.
· Note: Audacity does not currently support WMA, AAC, or most other proprietary or restricted file formats.

Editing:

· Easy editing with Cut, Copy, Paste, and Delete.
· Use unlimited Undo (and Redo) to go back any number of steps.
· Very fast editing of large files.
· Edit and mix an unlimited number of tracks.
· Use the Drawing tool to alter individual sample points.
· Fade the volume up or down smoothly with the Envelope tool.

Effects:

· Change the pitch without altering the tempo, or vice-versa.
· Remove static, hiss, hum, or other constant background noises.
· Alter frequencies with Equalization, FFT Filter, and Bass Boost effects.
· Adjust volumes with Compressor, Amplify, and Normalize effects.

Other built-in effects include:

· Echo
· Phaser
· Wahwah
· Reverse

Sound Quality:

· Record and edit 16-bit, 24-bit, and 32-bit (floating point) samples.
· Record at up to 96 KHz.
· Sample rates and formats are converted using high-quality resampling and dithering.
· Mix tracks with different sample rates or formats, and Audacity will convert them automatically in realtime.
Plug-Ins:
· Add new effects with LADSPA plugins.
· Audacity includes some sample plugins by Steve Harris.
· Load VST plugins for Windows and Mac, with the optional VST Enabler.
· Write new effects with the built-in Nyquist programming language.

Analysis:

· Spectrogram mode for visualizing frequencies.
· “Plot Spectrum” command for detailed frequency analysis.

Free and Cross-Platform:

· Licensed under the GNU General Public License (GPL).
· Runs on Mac OS X, Windows, and GNU/Linux.

What's New in This Release: [ read full changelog ]

Imports and Exports:
· 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