Thanks for your reply gregwalton.
Yes i also thoght it seemed like it actually was the amount of contour for the EG VCF level. But the sustain don't get more amount, so as far as i can see it is'nt. SUstain shall also get more amount of contour if it's that, and then i would call the parameter (AM) Contour like Cutoff is Cutoff.
It's not the level of the whole EG either, as if you see the VCA has a VCA amount parameter for this. I Would suggest to have a VCF amount too (AM VCF).
But still this i don't see as quite the same as having as having a parameter for the Amount of Contour parameter it self, as i have suggested to have in the feature section, as it look like an oversight it's not there.
A reason why you are not using the EG level can be because it seem to be inconsistent, and hard to get. I could see it could be used to get more level in the attack/ decay stage - as they don't affect the sustain.
But as said, then i find some inconsistent behavior for the EG when using this parameters.