Those dazzled by the Beastie Boys' crazily inventive, sometimes silly wordplay and too-cool-for-school image may find it easy to overlook the depth of their musical experimentation. But the all-instrumental EP The In Sound From Way Out! 13 tracks of jazzed-out percussion, blaxploitation synth, and the occasional orientalized violin, each of which would serve credibly as any hero's theme song should leave no doubt about where the grooviness really comes from.

