QUOTE (mike anon @ May 23 2009, 20:55) 
To produce an audible comparison of various MP3 files to the original, I am trying to find software that will produce a WAV file that is the difference between the best match between two sample WAV files.
If File1.WAV is the original, and is converted to File2.MP3 and then reconverted to File3.WAV, the difference between File1.WAV and File3.WAV should reveal the sound lost in compression, provided that one can match the sync and levels appropriately.
I have found FLAC software that will do sync and amplitude matching and produce a FLAC file of the difference, but I haven’t found any references a similar WAV file comparator.
EAC and foobar only tell you that files are different and where. They don’t generate a file of the differentials as far as I can tell.
Anyone know of appropriate software?
If File1.WAV is the original, and is converted to File2.MP3 and then reconverted to File3.WAV, the difference between File1.WAV and File3.WAV should reveal the sound lost in compression, provided that one can match the sync and levels appropriately.
I have found FLAC software that will do sync and amplitude matching and produce a FLAC file of the difference, but I haven’t found any references a similar WAV file comparator.
EAC and foobar only tell you that files are different and where. They don’t generate a file of the differentials as far as I can tell.
Anyone know of appropriate software?
Have you tried AQuA (Audio Quality Analyzer)? It gives you files similarity between the original wav file and the one you get from mp3. It clearly shows % of similarity between files and you can also get some quantitative values on why the quality is worse. I used it to find the best bitrate and sampling frequency to store my audio tracks.