Changing Sound cue pitch via Distance

Hi All,
Could someone please help with with a issue im having.

I have a sound cue noise, which i want to change the pitch off depending how close an object is too another.

Ie, the pitch start off at 1 at distance and the closer you get to the object the pitch increases to 1.3 then your next to it.
Ive tried using the Continuous moderator to control the pitch, which all works fine, but to do this by distance to and object the pitch lowers the closer you get, i want to to raise (ie think being chased).

Is the an option in the cue todo this ?, or does anyone know how to invert a distance float ?

Ta

yes mate, i did this by making the Min Output grater than Max Output of the Continuous modulator

cheers

worked a treat, thanks mate