first grab a sample, preferable not a one shot but rather something that changes quite radically. If you wish, make a basic beat.
Now take the part with the sample on it and sequence it with the beat(or say all of the 16 steps so you could do more interesting textural stuff...
Now turn on motion sequence to smooth, hit record and randomly give the sample start knob to record some random sample start-modulated loop. If you want you can try to make it sound cool but you don't have to because we will do just that in the next step.
Now here's the core of this technique, while it's playing, go into step edit mode. The main screen should automatically show Mot Value, if it doesn't turn the main dial until it does. You can now hit on steps and manually set the sample start point for every step you have highlighted.
This can be used for the reverse, roll, pitch ect. ect. for accurate control over all these parameters. Talk about some wicket breaks
Have fun, here's a nice little one minute demo
http://soundclick.com/share?songid=6526661
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