Audacity

Audacity® is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. The interface is translated into many languages.

You can use Audacity to:

• Record live audio
• Convert tapes and records into digital recordings or CDs
• Edit WAV, AIFF, FLAC, MP2, MP3 or Ogg Vorbis sound files
• Cut, copy, splice or mix sounds together
• Change the speed or pitch of a recording
• Apply a wide range of other effects to audio recordings