Sequential circuits samplers

hi list, i wonder if it is possible to calibrate filters on the 
2000/2002 as you can do with ensoniq esq-1 ..... every time i go 
through all 8 notes on my 2002 there are some sligtly changes in the 
filters, filter-velocity are set to off but it changes repetely like a 
8 note step sequencer.

cheers....

/k