Yet the most striking thing about DeVotchKa’s circuslike show at the Spiegeltent at the South Street Seaport in Manhattan in August was the music, a quilt of sounds from the international section of the iTunes store. One could hear mariachi ballads, polkas, horas and Gypsy tunes played on accordion, bouzouki, violins. But those sounds informed songs that also echoed the rhythmic bluster and vocal drama of 1980s alternative-rock acts like the Smiths and Talking Heads.

The band’s cross-cultural recipe was made explicit when the young crowd began sloshing its beers to a bouncy, Balkanized version of the Velvet Underground’s “Venus in Furs.” On any given night in an American rock club you can hear bands like Gogol Bordello, Man Man, Beirut and Balkan Beat Box playing odd-metered songs drawing on the rhythms of Eastern European Gypsy music.

You might encounter Antibalas or Vampire Weekend riffing on African sounds, Dengue Fever making psychedelic Cambodian pop or a D.J. like Diplo spinning Brazilian funk. On the recent “Kala,” a contender for the year’s most exciting pop album, the British-Sri Lankan rapper M.I.A., who works from Brooklyn, draws on Indian, African and West Indian sounds.

The folk-rocker Devendra Banhart creates fusions with Mexican and Brazilian musicians on his recent CD, “Smokey Rolls Down Thunder Canyon.” And the veteran musical adventurer Bjork toured this year with a West African percussion troupe and Chinese pipa virtuoso.