Did you ever see the midi macman, the interface with 1 in and 3 outs? I was offered one but I turned it down because I wasnt sure if it would work with the mini macman mros driver.
Maybe it would work with 1 in, and give you only 1 out?
If I could get an mros driver source code, that would be so helpful.
Maybe the orphaned atari projects page could get onto cubase to encourage them to release the sources, but I doubt they would, im sure there are several dealers selling CAF for big bucks.