> It will match against the Musicbrainz database and will acoustically ID your files, so the tags can be completely wrong and it can ID the song from it's sound fingerprint.
For songs that have covers, it will ID the song as any of a number of similar covers. I just tried to use it to tag something from the Grease 2007 revival soundtrack (which, as of this writing, doesn't exist in Musicbrainz), and it happily identified it as the same song from the 1994 revival, which is wrong. This makes me hesitant to use it to identify songs if I don't already know what the identification should be.
For songs that have covers, it will ID the song as any of a number of similar covers. I just tried to use it to tag something from the Grease 2007 revival soundtrack (which, as of this writing, doesn't exist in Musicbrainz), and it happily identified it as the same song from the 1994 revival, which is wrong. This makes me hesitant to use it to identify songs if I don't already know what the identification should be.