Wild Belle’s genesis can be traced back to the living room of the Berman household, where brother-sister bandleaders Elliot and Natalie sang jazz standards and Joni Mitchell covers with their mother, but the band’s sonic blueprint was drawn with the bold strokes of NOMO, the Afro-beat party outfit Elliot founded in college. When kid sister Natalie worked her way into the group, all the pieces of Wild Belle fell into place. Their debut, Isles, grooves just as furiously as anything from NOMO, but the dub-influenced indie pop is more visceral, less derivative, and nearly unclassifiable. While Elliot’s honking saxophones, buzz-saw guitars, and sound-system after-beats are pushed through a filter of half-broken 8-bit fuzz, Natalie delivers ambiguous, marvelously feisty lyrics with a razor-sharp edge. There isn’t a single dud on this album, but tunes like “Keep You,” “Happy Home,” and “Love Like This” prove that the band truly are an isle unto themselves.