Is it possible?

Hi!

I am totally new to Max For Live but since I bought Live 9 Suite I would like to make use of M4L. I always wanted to make a little additional feature in my projects. It doesn't look very complicated but I don't know this enviroment so I don't know if it is even possible to make. So here is the problem:

I use Live in a Session View. Most important thing is that I use TOGGLE as a Launch Mode. So when I hit the clip once it starts to play, and when I hit it again it stops. And of course the Play button in Master Track also work in TOGGLE mode. And now I miss one additional button in Master Track, that would be in the TRIGGER mode, so I would be able to launch all the clips together, whether they play or not (just like the Stop button in Master Track, but instead of stopping all the clips it would starts them). And I also need to assign midi message to this button.

Hope it is not very confusing. So... is it possible? :)