Hi philoop, apparently you know many things about this type of little objects !
I'm on trouble too for something really similar.
I have a toggle switch act like a play/pause for my sequencer.
The blue outlet is the pitch signal for my oscillators. Going trough a mixer with the pitch of my midi keyboard note. When I press off the toggle, I would like him putting on 0 the gain2 of my mixer, because when my sequencer is off, he is still acting on the pitch of my oscillators with his last step. When I turn to 0 the gain2, everything is okay to play with the keyboard.
So I need to find a way to do that... Could you help me please ?