Hab ich gerade im der Hilfe von CDex gefunden:
With this option you can select which ID-3 tag format shall be used by CDex. The advantage of ID3 V2 over V1.0 is that the track/artist/comment fields are not limited to 30 characters. If you select ID3 V2 tags, make sure that your player supports this tag format, otherwhise the player won't play the MP3 files! More details and background information about ID3 tags can be found at
www.id3.org