EXS 24 Logic Sampler Users Group

Could someone please tell me if it's possible to create the following
controller assignment?  Can I map the mod wheel so that increasing the value
from 0 to 127 adjusts the cutoff frequency of one of the lo pass filters
from the highest (essentially, no filter cutoff) to a user-specified cutoff
point (say, 1200 Hz)?  In other words, gradually moving the mod wheel on my
controller kbd to a high setting would have the effect of gradually rolling
off the high frequencies.

This is what has kept me from using EXS in the past--I absolutely MUST be
able to do this, and control amplitude from the mod wheel as well (which I
did figure out).

Thanks so much for any answers here!

Timothy