Help : Push/release midi mapping

[Biskwy]

Hi,

I just received my APC40 and i'm trying some advanced midi map.

I'd like to activate an effect (like BeatRepeat) pressing a key, a stop the effect when I release it (instead of pressing the key ywo times, for "on", and "off")
I've read many tutorials on midi mapping, but i can't figure out how i could do that (don't even know if it's possible)

Someone know how to do ?
Thanks !

[Biskwy]

Hi, i finally found http://forum.ableton.com/viewtopic.php?f=4&t=116407 who give a solution.
And found a way to do it in Live with gates and a effect rack.

Bye