Audacity is a free, easy-to-use and multilingual 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 CD's, Edit Ogg Vorbis, MP3, WAV or AIFF sound files, Cut, copy, splice or mix sounds together, and Change the speed or pitch of a recording.