Planet High School is noticeably more advanced than 2010’s Skulltaste. Where the former featured nebulous clouds of washed-out electro-hop, 2012’s Planet High School is a much more complex beast. “Brothers” opens with vintage organ drones and notes pulsing alongside stumbling rhythms and looped repetitions that suggest Mr. Mool has been listening to old-school avant-minimalists like Terry Riley and Steve Reich. “Live at 7-11” takes on more monotonous mantras of sound, but he contrasts those spare notes with looser-grooving instrumental hip-hop, making a more interesting dichotomy. Halfway through the song, rhythms morph into skittering beats and the keyboards turn into the kind of mind-melting prog that Rick Wakeman fans could jive with. Musing on vintage test-taking, “Hand on the Scantron” is another standout, with '80s Casiotone keys and groovy pimp-limping beats.