Downloaded the demo and played around a bit with it but can't get it to work. It's connected properly in the Midi setup and Globals selected properly. If I select a patch on either the Rev2 itself or Soundtower editor, both reflect the correct patch. If I change a setting on the keyboard directly, it updates on the editor. However, any controls I change on the editor do not get sent to the Rev2 and the sound does not change at all. Midi out is working though because besides sending programs to the Rev2, I can also make changes to Global settings in the editor and they update immediately on the keyboard. I've had another editor from Soundtower for the Prophet 12, so I know pretty well how to use the software. I don't think there is any setting I'm missing here either. Changing parameters on the editor just do not get sent to the keyboard. Note that I tired this with the keyboard connected both via MOTU Midi interface, and directly with a USB cable to my Mac desktop. I also updated the Rev2 from OS 1.05 to 1.065. Nothing works. Waiting for a reply from Soundtower at this point.