OCULA returns with mesmerizing techno release ,’Groundwork,’ on latest mau5trap compilation OCULA showcases his darker side on the new, brooding techno release 'Groundwork' out on Mau5trap. Related Posts: Stream deadmau5’s first hau5trap original, ‘Nextra’ Stream mau5trap’s ‘We Are Friends, Vol. 10’ with Wolfgang Gartner, ATTLAS, deadmau5, Grabbitz