MP3Header :: version - MP3 header version
The ID3 header version is either 3 (ID3v2.3) or 4 (ID3v2.4).
Notes:
Supported tags differ between version 3 and version 4. Changes are listed at http://www.id3.org/id3v2.4.0-changes.
Return value: ID3 header version ( int32 )
The ID3 header version is a number greater than 0 and less than 255 .