Audacity is a free, open-source digital audio editor that runs on the Mac, Windows, or Linux operating systems. It allows the user to play, record, and edit sound files including the WAV and Ogg Vorbis formats. With the addition of a plugin called the LAME MP3 Encoder, Audacity will handle the MP3 format as well. Audacity does not have the built in capacity to rip compact discs but is an excellent tool for converting analog audio to digital audio, as well as for manipulating the digital file once it is created.