DrumTrackPatternEvent

 1 DRUM TRACK PATTERN EVENT DATA
 Object Version: 0

 It's simply an array of the event data (8byte/event. See 'EVENT DATA FORMAT IN SONG' in 
 SongEvent.txt). The total number of the events per pattern, is valiable and the 
 events are sent as separated packet. Single packet can have up to 3000 events.

 ex)
  o If there are 1000 events in a pattern, all the events are sent in a single F0~F7 packet.
  o If there are 5000 events in a pattern, you'll see two F0~F7 packets. 1st packet has 3000 events, and 
    2nd has 2000 events.