Acoustid Database
Acoustid listens to a song, and create an audio fingerprint of the song based on the actual music.
The idea is that different songs always have different fingerprints , but the same song encoded in different formats (such as mp4 or mp3) or in a slightly different way will have the same fingerprint.
Acoustid then provides a database that matches acoustid to recordings in the MusicBrainz Database. We can use this database to match your songs and it is really useful if your songs have no metadata, because it allows Jaikoz to still find a match if the fingerprint is in the Acoustid database.
Acoustid also has its own basic metadata that we can use for songs that do not have a link to a Musicbrainz song, the Acoustid database contains over 70 million songs !
Jaikoz uses Acoustid as its main database for audio fingerprinting.