Doepfer

hi list,
  
  i am would like to trigger my cr80000 drum machine from my modular and  via midi. . . but i've noticed that the cr8000 internally seems to want  a trigger signal that is the opposite polarity of the standard signal.  i know that there are commercially available voltage invertors. the  problem is i want to invert about 14 channels, so this would get  prohibitively expensive. is this something that can be done easily?  anybody have any ideas, or a boatload of cheap voltage inverters?
  royce
  
  
		
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