Pattern 1 - Rock Straight 8 - Hi Hats All Closed - File Name 'rockstraight8th1.mid'
Pattern 1a - Rock Straight 8 - 2nd bar - Last Hi Hat Open - 'rockstraight8th1a.mid'
Pattern 1b Rock Straight 8 - each bar - Last Hi Hat Open - 'rockstraight8th1b.mid'
Pattern 1c Rock Straight 8 - 2nd bar - '3+, 4+' Hi Hat Open - 'rockstraight8th1c.mid'
Pattern 1d Rock Straight 8 - Both bars - '3+, 4+' Hi Hat Open - 'rockstraight8th1d.mid'