I have the following situation in Arena:
I have some clip, e.g. a Solid Color Generator and the Trigger is set to Piano (press and hold). I can use the Timeline Setting + Envelope on the Clip's Opacity parameter to create a FadeIn Effect. I wonder if there is a (either native or workaround) way to have a FadeOut as well. But mind the Piano Trigger: The FadeOut should only begin after releasing the button.
I am open for any kind of suggestion. Clean solutions are preferred but I am also interested in seeing how you think Arena out of the box.

Thanks!