Smoof
2
What exactly is your problem?
To play a sample cromatically set chromatic to sample or synth + sample in the sound menu.
In chromatic mode, you can switch octaves up and down by using the up and down arrow keys, indicated by changing the colors of the pads accordingly.
Also, keep in mind that if you tune your sample up or down, the range that you can play around middle c (first of the light blue pads) in chromatic mode becomes smaller since chromatic mode is essentially controlling the tune parameter.