@HISEnberg smoothstep won't help here. It is not related to time smoothing but to "delinearise" a curve and give it a S shape
To get rid of zipper noise, it's a combination of smooth parameter and fix block or frame container
I have never found a proper way of mathematically setting the smoothing time and the block size, always finding myself bending parameters in the dark... If somebody has a proper and reliable way to remove zipper noise with the most efficient timing and cpu cycles it would be neat!
Is there a magic formula? ☺