Do you need to access the metadata in your audio files, for example the ID3 tag information in your MP3s? AudioShell is a free Microsoft Windows Explorer shell extension that allows you to view and modify music files tags directly. AudioShell supports MP3 (all ID3v2 tag versions), WMA, ASF, WMV, Apple iTunes AAC (M4A and M4P), MP4, OGG, FLAC (vorbis comment tags), MPC, MP+, monkey's audio, WAV pack, optim frog (APE and APEv2 tags).
If you want more information about audio file tags (such as: ID3), check out the following site. Below is a excerpt from the site: "Digital audio files can contain, in addition to the audio track, related text and/or graphical information. The information you're probably familiar with take the form of Song title, Artist name, Album name, Year and Genre. This is the information displayed when you playback a digital audio file on your computer or portable device."