If you have a large collection of MP3s, WMAs and other audio files, you probably have quite a few where the tag information isn't set up properly. In other words, they don't come up with the correct track name or artist in your media player.

Editing these tags manually can be a laborious task, but fear not, the contributers at
MusicBrainz offer a solution to your problem. As they say themselves:
MusicBrainz is a community music metadatabase that attempts to create a comprehensive music information site. You can use the MusicBrainz data either by browsing this web site, or you can access the data from a client program — for example, a CD player program can use MusicBrainz to identify CDs and provide information about the CD, about the artist or about related information. You can also use the MusicBrainz Tagger to automatically identify and clean up the metadata tags in your digital music collections.
The website has a number of applications that you can download which access the database. The one I found most useful was
Picard, which provides an interface to search the...