Audacity is a free, easy-to-use audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. You can use Audacity to:
Audacity works best on computers meeting more than the minimum requirements stated above. For lengthy multi-track projects, we recommend using machines of substantially higher specification than the minimums.
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.
Add new effects with LADSPA plug-ins.