Ah, I think I may have misread the OP. It sounds like you want recording to begin whenever you start playing, regardless of the note. Is this correct?
The technique described in the post would let you set up a generic remote and assign, say, the lowest C on your keyboard as the trigger. When you play that specific note, recording would start, but it would only happen for that one note.
If you’re looking for a way to have Cubase simply recognize that you’re playing and respond, don’t know how to do that. I haven’t used Pro Tools in ages, so I also don’t have a point of reference.
You could always train your cat to press play, but they generally have a bad attitude about such things and would probably just complain to the labor union. 