Hi - thanks for the various info that people have posted. What is interesting is that Rotary Speed (Fast/Slow toggle) can be assigned to an assignable button, and can be assigned to a footswitch plugged into the Genos. And that the Extrnal Controllers list of items that can be controlled is huge, but omits Rotary Speed (Fast/Slow toggle). It certainly sounds like it would be technically possible for Yamaha to have allowed this control to be triggered just like the other ~100 items on the list for External MIDI Controller; I think it was just an oversight; somehow the engineer didn't happen to include this one item on the list.

I'm going to try a MIDI Monitor on the Genos to see what is sent (if anything ) when I press the Rotary SP button . . .

Jim