Region properties → Region Line allows one to display and draw automation for a specific plugin parameter, for that region. That’s cool (I saw the Reaper people use it and I’m happy that Ardour now has this too)!
How is “Show on Touch” supposed to work? It is not documented at The Ardour Manual - Applying effects to regions separately
The info tooltip says:
"When touching a control in a region effect plugin UI, the corresponding region automation line is shown [in ?] the editor, and edit mode is set to ‘draw’.
I was unable to trigger this behavior.
I want to automate Steve Harris’ (LADSPA) “Matrix MS to Stereo” plugin. It has only one control : width.
I can draw the “width” line, and the plugin responds to it when I play the region. But after I’ve done that, the “Width” cursor on the plugin’s interface is greyed out and doesn’t react any longer to mouse drags. It only obeys the drawed line.
And if I display the gain line instead, and try to tweak the “width” cursor, nothing happens (from the info tooltip, I would have expected the display to switch to the “width” line).
So how is “Show on Touch” meant to be used? And are there play/manual/touch/write modes for region automation, as there are for track automation?