Convert a WAV file (Manual)
To convert a file you can use a free tool like “Audacity”.
Download Audacity: http://www.audacityteam.org/ and install it.
Click on “File > Open” and locate the file you want to convert.
Free, open source, cross-platform audio software
Audacity is an easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems.
Developed by a group of volunteers as open source.