how do i cut out the highs on a 1k

i was told to make a filter...so do i assign a slider as a filter? i tried putting -50 -50 for q1 and it doesnt effect the sample...what am i doing wrong? how can i get the bass soundo nly on one of my samples on the 1000.

page 63 of the manual shows how to filter individual samples. the low pass filter is what you need .