The SpectralDiff plugin detects if two audio files are identical or slightly different. For this purpose, it computes and displays as spectrum the difference between the two files during the playback. The difference is computed and updated in real-time, which means that the plugin detects if the two signals are identical at one point then are slightly different later on the track.
Examples of use
Comparing two bounces of a mix: we have two bounces of a mix, and we don't remember if they are identical or if we made some changes.
Comparing versions of audio tracks: if we didn't make the sound recording ourselves, and we receive several versions of each track to mix, we can check if some of the received tracks are identical.