Audacity is a free, open source software package for recording and editing sounds.
Supported operating systems:Mac OS X, Microsoft Windows, GNU/Linux, and more.
Features:
- Record live audio.
- Convert tapes and records into digital recordings or CDs.
- Audio formats: Ogg Vorbis, MP3, WAV or AIFF sound files.
- Cut, copy, splice or mix sounds together.
- Change the speed or pitch of a recording.
Also has plugin and effect support.