Hi all! I trying to get my head around how to fire a midi clip in the cue grid via midi controller. I have connected a foot controller and selected it as midi input for a soft synth track (midi input seems to work fine).
Now in the cue grid, i dragged a midi clip on the synth track and it sounds like expected when i click the cell’s play symbol, but when i want to use the midi controller, nothing happens when i use midi learn. Afaik i have to use a note on event, so i set up the controller swith to send a note on event for midi note 70 and a velocity value of 100. The synth then plays the note (which i don’t want It to, by the way) but the midi clip wont start playing.
I hope, someone can help me there, and sorry for my poor english. 
Ah, okay, i figured out that there’s a “cue control in” which i can connect my foot controller to via the QjackCtl connection graph. But until now, i couldn’t find a way to do this inside ardour. Can sombody enlight me, how to get this working inside ardour without QjackCtl?
Thanks for your research, as I was facing the same problem.
I was able to use the “MIDI Connection Manager”, under the menu “Window”, to connect the MIDI controller (tab “Hardware” on the left) to the cue control in (tab “Ardour Misc” at the bottom). I hope that helps.