Ahh I broke some of this down in a twitter conversation: @CriticalMammal - arp tweet . In the conversation I was confused and thought it was the 'weird drums' sample at first but I only used the 'rhythmic bass' sample for the more percussive arps. 'weird drums' wasn't used at all in the song actually.

Lemme know if that's specific enough or if you want to know any other details.