==========================
=== GENERAL COMPARISON ===

            Header                      Extended Header                             Frame                       Padding                 Footer
------------------------------+--------------------------------+--------------------------------------------+--------------+-------------------------------+
I  D  3  4  0  X  Y  Y  Y  Y  |  X  X  X  X  0  1  Y  Y ...    |  X  X  X  X  Y  Y  Y  Y  Z  Z  D  D  D...  |  0  0  0...  |  3  D  I  4  0  X  Y  Y  Y  Y |
-------  ----  -  ----------  +  ----------  ----  --------    +  ----------  ----------  ----  ----------  +  ----------  +  -------  ----  -  ---------- +
I  D  3  3  0  X  Y  Y  Y  Y  |  X  X  X  X  Y  Y  Z  Z  Z  Z  |  X  X  X  X  Y  Y  Y  Y  Z  Z  D  D  D...  |  0  0  0...  |             none              |
-------  ----  -  ----------  +  ----------  ----  ----------  +  ----------  ----------  ----  ----------  +  ----------  +                               +
I  D  3  2  0  X  Y  Y  Y  Y  |              none              |  X  X  X     Y  Y  Y           D  D  D...  |  0  0  0...  |             none              |
-------  ----  -  ----------  +                                +  -------     -------           ----------  +  ----------  +                               +



==========================
=== HEADERS COMPARISON ===

   ID3v2/file identifier   "ID3"		| ID3v2/file identifier   "ID3"			| ID3/file identifier      "ID3"
   ID3v2 version           $04 00		| ID3v2 version           $03 00		| ID3 version              $02 00
   ID3v2 flags             %abcd0000		| ID3v2 flags             %abc00000		| ID3 flags                %ab000000
   ID3v2 size          4 * %0xxxxxxx		| ID3v2 size          4 * %0xxxxxxx		| ID3 size             4 * %0xxxxxxx
						|						|
   a - Unsynchronisation			| a - Unsynchronisation				| a - Unsynchonization
   b - Extended header				| b - Extended header				| b - Compression
   c - Experimental indicator			| c - Experimental indicator			|
   d - Footer present				|						|



===================================
=== EXTENDED HEADERS COMPARISON ===

   Extended header size   4 * %0xxxxxxx		| Extended header size   $xx xx xx xx		| none
   Number of flag bytes       $01		| Extended Flags         %x0000000 00000000	|
   Extended Flags             %0bcd0000		| Size of padding        $xx xx xx xx		|
						|						|
   b - Tag is an update				| x - CRC data present				|
   c - CRC data present				|						|
   d - Tag restrictions				|						|



=========================
=== FRAMES COMPARISON ===

   Frame ID       $xx xx xx xx (four chars)	| Frame ID       $xx xx xx xx (four chars)	| Frame ID       $xx xx xx (three chars)
   Size       4 * %0xxxxxxx			| Size           $xx xx xx xx			| Size           $xx xx xx
   Flags          %0abc0000 %0h00kmnp		| Flags          %abc00000 %ijk00000		|
						|						|
   a - Tag alter preservation			| a - Tag alter preservation			|
   b - File alter preservation			| b - File alter preservation			|
   c - Read only				| c - Read only					|
   h - Grouping identity			| i - Compression				|
   k - Compression				| j - Encryption				|
   m - Encryption				| k - Grouping identity				|
   n - Unsynchronisation			|						|
   p - Data length indicator			|						|



==========================
=== FOOTERS COMPARISON ===

   ID3v2 identifier           "3DI"		| none						| none
   ID3v2 version              $04 00		|						|
   ID3v2 flags                %abcd0000		|						|
   ID3v2 size             4 * %0xxxxxxx		|						|