Convert ORG to MP3

I need to know how to convert ORG files to MP3 files. If anyone has any idea I would like to know.

 

http://www.cavestory.org/forums/threads/1994/
http://www.cavestory.org/forums/threads/3191/
http://www.cavestory.org/forums/threads/1426/
http://www.cavestory.org/forums/threads/810/
http://www.cavestory.org/forums/threads/715/
http://www.cavestory.org/forums/threads/505/
http://www.cavestory.org/forums/threads/75/

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