World music has gradually seeped into the rock songs American kids write these days. I generally support the trend, and credit the Internet: where it once required years of crate-digging and personal musical exploration to find one’s way to an Os Mutantes, a survey of Brazilian ‘60s art-pop is now only an Amazon recommendation and two clicks away. Louisiana’s Givers indulge in nerdy time signatures and Afropop tones, not unlike Dirty Projectors, with whom they’ve toured. But there’s also some tropicalia and reggaeton in the band’s melodic sound. And, for good measure, faint echoes of Zydeco -- gotta rep the home team.