ch  0          1          2    vol   3
  f#4 00 --- D#2 05 --- D#3 02 --- --- -- ---
  --- -- --- --- -- --- D#4 02 --- F#4 03 ---
  f#4 00 --- --- -- --- D#3 02 --- --- -- ---
  --- -- --- --- -- --- D#4 02 032 --- -- ---
bits
  0-4 = channel
    5 = instrument+note
    6 = volume
    7 = effect

"f#4 00 ---" -> %0010 0000, value_for_f#4, 0(note) -> 3 bytes
"%0010 0000" means bit 5 is set -> instrument+note are coming (2 bytes to read for player)

row1 in total is:
%0010 0000, value_for_f#4, 0, %0010 0001, value_for_d#2, 5, %0010 0010, value_for_d#3, 2, %0000 0000
row2 is:
%0010 0010, value_for_d#4, 2, %0010 0011, value_for_f#4, 3, %0000 0000
row3 is:
%0010 0000, value_for_f#4, 0, %0010 0001, value_for_d#2, 5, %0010 0010, value_for_d#3, 2, %0000 0000
row4 is:
%0110 0010, value_for_d#4, 2, volume32, %0000 0000

the example above is
32 bytes large (if I didnt miscount :)


when control byte is %0000 0000 it means 'we are done with that row'