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Looking for freeware or open source software for Windows that can analyze audio files to determine if it is a duplicate of another audio file regardless of file format (mp3 vs. m4a vs. flac) and bitrates (128kbps vs. 320kbps).

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I found a program specific to music (and bonus, images)!

http://www.similarityapp.com/

I used the program to compare music encoded in different formats (flac, m4a, mp3, wma, wav). A duplicate file finder really shows their limitation when the encoded formats or metadata makes the likelihood of finding duplicate music files impossible.

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I can recommend you 2 softwares :

  1. Auslogics Duplicate File Finder. Its a small program to find duplicate files in your system including images, audio, video and other personal files.

  2. Tune Up Utilities 2014. Actually it is a PC optimization tool. But it has a duplicate file finder tool in it.

I had used both many times and both are good.

  • I found a software called similarity which is more what I was looking for. Auslogics when I checked in oct 2014 asked you to install malware with their installer. – Sun Nov 22 '14 at 5:58
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    Duplicate finders most likely will only compare raw file data instead of analyzing its contents and decoding it by bitrate/codec/whatever. – Alejandro Dec 4 '14 at 23:35

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