This set up will allow you to closely emulate the actions of a turntable and crossfader.
steps –
1) get a scratch sample duplicate to 4 pads in a square
2) set poly to 1 for all pads in the group
3) reverse the 2nd pad and the 3rd pad
4) Set the start point for the reversed pads to that you get a quicker start
5) select all pads
6) set choke group for pads
now you can (with all pads selected) adjust the tune and all the pads tunings will adjust together
this will allow you to emulate scratching forward and reverse like a turntable. Enable auto write to record your pattern