The randomisation feature in Loopcloud DRUM 1.5 can replace between 1 and 16 samples in your drum kit with one click of the dice button. The sample(s) that are chosen when randomising are based on the tags selected in the refine section.
Loopcloud will do a search of your Loopcloud library - samples that you own or have imported into your library, but NOT samples that you do not yet own. Once the search has completed, samples will be downloaded and loaded onto the pads.
If you have any further questions about Loopcloud DRUM at all please get in touch with our Support Team at firstname.lastname@example.org - we'd be more than happy to help.