One of the more unexpected delights of last year's Olympics was hearing this duo's heady music being blasted out during the opening ceremony. Slow Focus finds the Bristolian noiseniks suitably emboldened. Their third album is denser, more heavyweight and grandiose than their previous offerings, Tarot Sport (2009) and Street Horrrsing (2008). Seven tracks reverberate with malevolence, often – as on Brainfreeze and The Red Wing – recalling the nimble dread of Boards of Canada, but with a more generous low end. Some might miss the urgency of Tarot Sport's beats, but variations within repetition is what distinguishes the best drone music, and Slow Focus soundtracks some unnamed disaster with time-lapse photography for the ears.