Audio Comparer is a Windows desktop application for MP3, MP2, MP1, WMA, AIF, WAV and OGG audio files comparison developed by Bolide Software. The program is meant to find duplicate audio files and sort them in whatever way you want.
Audio Comparer "listens" to audio files in your musical collection and compares them by the actual audio content - by sounding, not external properties. The program is really "intelligent" and it remembers tons of your audio files once and forever. The most recent version of Audio Comparer is always available at http://AudioComparer.com/software/ac_setup.exe The program's official site - http://AudioComparer.com.