Thanks Ted, I now know that I didn't muck things up. I have read, and reread about midi files and function, watched YouTube videos, and I still don't know how these things work, or function. I understand that they only contain data instructions to the midi controller, and the controller (CTK7200) takes it from there, but I still don't get it. I've read that you just download a file and play it, but still stumped! I don't own a pc or ipad, but use a Chromebox, so not Data Manager, is that a bottleneck? Your patience and understanding is appreciated. Paul