Audacity.sourceforge.net - Record & Edit Digital Audio

Audacity is a free, easy-to-use audio editor and recorder primarily for the Mac OS X, Windows, and GNU/Linux platforms. Audacity can be used for recording live audio or for converting vinyl and audiotapes to digital recordings.

You can also edit digital sound files (Mp3, WAV, AIFF, or Ogg Vorbis) by cutting, copying, splicing, and mixing sounds together, changing the speed or pitch of a recording, and more. After downloading the Audacity software, it is fairly easy to master and ample instructions are provided. When editing a digital recording, you will see a visual representation of the sound waves and, to cut out a portion of a recording, for instance, you simply drag the start and end points along the sound waves, press play to make sure you hear your desired results, and save your new audio file. Audacity is open source software for personal, commercial, or educational use, and while unlimited use is free, donations are encouraged.