Tried to search here, but found nothing about my problem.
Making a filter envelope, but this kind of envelope is not so simple as i found on posts here. I need an envelope that can be straight or inverted (from -100% to 100%). At this moment i made an envelope that can work as i need only straight.
The main problem is when i use clip, for example. It will clip instead of scale what i need.
Here is patch. For this example i used phasor as envelope generator.