Glasgow-born Steve Goodman, the producer and Hyperdub label owner who records as Kode9, is a figure at the absolute center of dubstep. He signed scene standard-bearer Burial and his own production work, as collected on this 2006 collaboration with vocalist the Spaceape, helped give the music its shape, reconfiguring the spare melodica ("Victims"), processed drum sounds (check the drowsy, slow-mo, repeated ride cymbal that kicks off "Backward") and heavy echo (take your pick) into something more in line with post-rave aesthetics. The bridge for outsiders is "Sine," a radical dragged-through-mud version of Prince's "Sign ‘O 'the Times," but "Quantum," which ends the album, is an abstractly gorgeous array of bright sounds (sitar notes, treated slot-machine noises) over a foot-dragging steppers groove.