They're not new; and they explain themselves pretty well on the site, so I'll let them do the work here. All I want to add is my belief that whoever is running this site will ultimately become very wealthy.


Quote:

MusicBrainz is a user maintained community music metadatabase. Music metadata is information such as the name of an artist, the name of an album and list of tracks that appear on an album. MusicBrainz collects this information about music and makes it available to the public so that music players can retrieve information about the music that is playing. For instance, an audio CD does not contain the name of the artist, album or a listing of the tracks. A music player can use the physical characteristics of an audio CD to lookup the correct metadata for the CD and show it to the user during playback.
MusicBrainz also takes this concept one step further in applying it to digital audio files like MP3 files and Ogg Vorbis files. The metadata contained in these files is often incorrect or missing altogether. If this data is not present or correct, it makes it difficult for users to find the music they wish to play. Many MP3 lovers have a huge collection of MP3 files but often have a hard time finding the music to which they want to listen. The MusicBrainz solution for this is the MusicBrainz Tagger, a Windows application that uses acoustic fingerprints (TRMs) to semiautomatically identify tracks in your music collection and then write clean and accurate metadata to your music files.