Free audio recording and editing software that rivals many commercial tools. Record live audio through a microphone or digitize recordings imported from other media. Audacity’s capabilities rival many commercial tools.
Audacity’s Help Pages – Tutorials and tips on using Audacity.
Audacity in Education – Wiki page by Audacity team with best educational uses and examples of uses by several institutions.
To export in MP3 format, you also need to install the Lame MP3 Encoder plug-in.