Audacity is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems. Learn more about Audacity... Also check our Wiki and Forum for more information.

This release highlights exciting new capabilities
* 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

Other experimental features: Sound activated recording; ability to save smaller, compressed project files; MIDI files can now be imported, cut-and-paste edited, then exported.
Miscellaneous: Interface improvements include a new Transport menu, and a new Preference to choose Waveform, Spectrum or Pitch view. Several bug fixes.