Hi Andy
I am not a native english speaker as you may recognize, but I really
have difficulties to understand your descriptions.
You wrote: " it's the response of gain vs CV inputs that I'm talking
about". And that is what the graph displays: the response of
gain(=y-axis) versus the controlling voltage (=x-axis).
I will try to find time to make a comparing video (displaying the
outputlevel of the same signal source through a linear VCA Left and a
exponential VCA right on a stereo peak meter).
Florian