Audio Comparer

Law enforcement and forensic labs compare voice recordings to authenticate evidence — for instance, determining if a recording has been edited, spliced, or tampered with. They can also match unknown voices against suspect samples using spectrographic cross-correlation.

It compares these maps against other files in your library. audio comparer

To find out if a "remastered" track is actually just the original track turned up louder. Law enforcement and forensic labs compare voice recordings