The problem still remains, cus it still cuts the sound at volume 1-2 somthing.. but i noticed that if i put a delay between the sounds you'll never get that "silence" but u can cover up the sound cut. But thats cheating tbh :P. And now I have too work with two seperat amb_gen's. So its not quite what i was looking for.
There should be a way too have 1 gen and just 1 trigger.. then the amb_gen should fade out proper too 0 and not cut the sound..