I don't know, I read the manual, did as it requested and hey presto it worked. I didn't just fly in there with the attitude of man reading it (which is fuckin' unusual for me). I've loaded it up with VST's,triggered it from a my mac using logic. I then recorded the midi data from my mac onto a midi disk recorder (disk spelled in the floppy format way) and triggered it from that aswell. It works a treat and worth every penny/cent.