Automate snare pitch in NI Battery kit in Reaper

[JMTee_]

Hi all,
How do I automate snare pitch in NI Battery kit in Reaper?
When I'm in the Battery UI I see a bunch of parameters that I can create an automation for, but they all have numbers associated to them, no indication which parameter would be pitch.
I want to automate so that in a snare roll, each hit of the snare progressively pitches lower, thanks!

[Morgaxx]

First wiggle the pitch knob a bit. Second select the "show last touched fx parameters only" when you open the track envelopes/automation window. This option is right above the regular list of parameters.