Audacity

Audacity is a free, Open Source, cross platform digital audio editor. The source code for Audacity is released under the GNU General Public License. The graphical user interface for the editor has been produced using the wxWidgets library.

Audacity was created by Dominic Mazzoni of Google, while he was a graduate student at Carnegie-Mellon University. Dominic Mazzoni is still the main developer and maintainer of Audacity, with help from many others around the world.

Audacity is extremely popular in the podcasting world due to its wide availability, multiplatform support, and the fact that it is free.

Audacity is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems as well.

Go to the site at – http://audacity.sourceforge.net

Some of the Online Help
some Uni’s Manual

See other free Audio Tools