If the sample is synchronized:
X
Got to beat X
Y
Offset in the beat (in Y/256: 0 = begin of the beat; 80 = middle of the beat; FF = nearly the end of the beat)
Else:
X
Divide sample in X parts
Y
Go to division Y
you can handle the samples more precisely this way, if you want to cut it up to 32 parts and want to play the sample from the 16th then you simply write: