anyone know of a resonant/lp filter plug in?

[r0cker]

hi there, does anyone know if there is a (dx or vst) plug in that acts like a low pass or resonant filter on a sampler, that varies over the length of the sample rather than staying the same? any help much appreciated
cheers

 

[AlChuck]

check

http://www.thedirectxfiles.com/

 

[LongWaveStudio]

check the waldorf plug-in filter