Where do I get a CHEEP cable as I describe above? I've seen them from $5 on up to $50. Which one specifically handles my OS? I have Windows 7 as an operating system, and am trying to play some mellotron/string software I freeloaded from the net (just Google "mellotron freeware", I forget the name of the program. All I have is the chromatic notes unzipped in my Download section) onto my PC. Anyone? Thank you in advance.