The Data Block may be devided into several sub-blocks of data.
  Each Block starts with the Block-Id Byte ( offset + 0 )

  Block-Types :


  Terminator (0)
  Marks the End of the VOC-file

  ew Voice Block (1)
  This is the normal Data Block

           offset+1-3 = Blocklength
           offset+4   = SampleRate -1000000 / (sr - 256)
           offset+5   = Pack Byte
                        0 = unpacked  1 = 4 Bit
                        2 = 2.6 Bit   3 = 2 Bit
           offset+6   = xxx Voice data

  Subsequent Voice Block (2)
  is following a 'New Voice Block' without setting new Parameters.
  Its purpuse is to divide big Data Blocks to fit into one Segment

           offset + 1-3 = Blocklength
           offset + 4   = xxx Voice data


  Silence Block (3)
  This Sub-block defines a silence period in the voice data
  ( not supported yet )

           offset + 1-3 = Blocklenght ( 3 byte )
           offset + 4-5 = Period ( Number of ZeroBytes )
           offset + 6   = Sample Rate

  Marker Block (4)
  Specifies a Marker in the voice data, so the calling programm can
  synchronize with the Sound ( not supported yet )

           offset + 1-3 = Blocklength ( 2 byte )
           offset + 4-5 = Marker byte


  Message Block (5)
  You can store a null-terminated string here.

           offset + 1-3 = Blocklength
           offset + 4-x = ASCII - Data
                          0h  = Endbyte

  Repeat Block (6)
  Specifies the beginning of a repeat loop
  ( not supported yet )

           offset + 1-3 = Blocklenght ( 2 byte )
           offset + 4-5 = Repeat Counter  0-FFFE, FFFF=NeverendingStory

  Repeat End Block (7)
  Marks the end of a Repeat Loop

           offset + 1-3 = Blocklength ( 0 byte 0