This is where an becomes an essential tool. Unlike standard file duplicates finders that only look at file names or file sizes, specialized audio comparison software "listens" to the actual sound content.
This allows the software to be incredibly robust. It can identify a song even if the file has been compressed differently, has a slight quality difference, or—in some advanced cases—even if the file has been trimmed or recorded from a different source (like a live recording vs. a studio album). audio comparer
