"The smart boys back with the dumb sound," raps Heems of Das Racist on "Selena." Actually, the sounds of Relax are pretty smart. The New York trio has made a quantum leap since their 2008 novelty "Combination Pizza Hut and Taco Bell," and songs like "Shut Up, Man" (with El-P as a guest) and "Michael Jackson" have intricately satirical wordplay as well as dumb-hot hipster beats. As Das Racist celebrate White Castle burgers on "Rainbow in the Dark" and sing the dance-pop number (or parody?) "Girl," it's difficult to tell if these guys take anything seriously. But that's probably the point.