if you are using the slicer you could try to pitch it up/down by going to the slicer channel and right clicking on the one of the keys in the bottom. of you dont want to change the pitch try playing with the tempo.
that should do the trick but if for some reason it dosent you can just drag and drop the song you want to sample into the bottom of the playlist. you can cut the part that you need and stretch it to fit the amount of bars you want.
