thanx a lot for your reply!
It depends on the preset and the parameter. The more common ones are smoothed, but not all.
my favorite parameter to control is the speed/rate of the delay time, for that bouncing ball effect, on every vst i have tried i get ugly crackles. on for instance a old samlper of mien, yamaha A-5000, idont and can change the delaytime from very long to where i almoust get a pitch effect.. this is a affect i do alot. i understand if you dont now how it responds to this but i ask anyhow.