Math / VST scaling question

i’m trying to map VST audio parameters to VVVV. My goal here is to transform VVVV events at the same rate as certain VST plugins…

While I do have the communication running just fine, I can’t seem to figure out what the scaling is for these parameters (for example, you get very fine adjustment between 0 and 2 hz, and it gets more coarse as the frequency increases). Of course this isn’t information that anyone bothers to make public… Is exponential scaling typical?

I’ve played around a little bit with Gamma and it seems to approximate one plugin fairly well, but I’m looking for tighter synchronization.

Any thoughts?