Thanks again for your help.
The bass drum was the only one that disappeared, but I think that is because it was the only note I changed the out port on. The rest of the notes (snare, etc.) were all still set to the TTS-1.
I did go through the MIDI set-up on the SR-16 last night, and I think I used the settings you mentioned above. I’m on a different computer right now, though, and I don’t have the SR-16 handy, so I’ll have to double check later. I’m going to give it all another shot tonight, and I’ll go through all the suggestions from you and the other response above.
Thanks for bearing with me and for your words of encouragement. As I mentioned in my response to michaelalala, patience is not my strong suit. I’ve only been at this stuff for less than a week. It’s just frustrating to try everything I can possibly think of without getting any results. I’m sure the problem is something really simple, and once I learn it, I’ll never forget it. So I’ll keep at it, even if it drives me completely mad.