How could I edit MIDI regions in MuseScore.
Like I double click on a MIDI region and it open in MuseScore.
Or at least I can edit notes on a musical 5 lines staff, whatever the program.
The point is to move away from the piano roll.
That would be great
There is no way to do that inside Ardour.
However, you can score a project in MuseScore or Rosegarden to begin with and then “pipe” MIDI output to Ardour for mixing and mastering. You will need JACK backend to do that.
I have already written a little “how to” on this topic in this thread:
and here for the MuseScore: