Quote Originally Posted by Dr Unne View Post
Step 1: Install Linux
Step 2: sox FILNAME.mp3 REVERSED.wav reverse
Step 3 (optional): lame REVERSED.wav REVERSED.mp3

http://sox.sourceforge.net/
http://lame.sourceforge.net/USAGE
Ooh I guess you could skip step one and get the Win32 binaries instead, or use linux livecd to avoid installing