From TMB Wiki
Audacity is a free, easy-to-use, cross-platform 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.