,User 905133 and scook, thanks to all your hints I can now see IK Multimedia Hammond B3-X in my plugin list, and when I choose it for a track I do see the Hammond keyboard interface. However, when I use that interface nothing is recording, although I can hear the notes as I play them. Furthermore, the Roland synth does not work as a controller as I was hoping. (Am I possibly accessing a Hammond B3-X plugin contained within Cakewalk as opposed to the app I usually use? The 'Settings' screen is different than what I am used to.) At this point I am thinking that my idea is not going to work without additional sound card hardware, but if anyone has any more thoughts please send them along. Meanwhile I will go through documentation and tutorials.