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).
I found a program specific to music (and bonus, images)!
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.
I can recommend you 2 softwares :
Auslogics Duplicate File Finder. Its a small program to find duplicate files in your system including images, audio, video and other personal files.
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.