The Free, Cross-Platform Sound Editor. Audacity is free, open source software for recording and editing sounds. Audacity is a free, easy-to-use audio editor and recorder for Windows (downloads are also available for 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, WAV or AIFF sound files.
• Cut, copy, splice or mix sounds together.
• Change the speed or pitch of a recording.

Audacity is free software, developed by a group of volunteers and distributed under the GNU General Public License (GPL).