The Chicago World Music Festival's lackluster September lineup may make more than a few world music fans envious that Lollapalooza scored Amadou & Mariam. But for the blind Malian couple, decked out in matching maroon and gold outfits and gold-plated shades, its serpentine, percolating Afro-pop was the only thing on the agenda. One of few international guests other than the handful of South American acts opening throughout the weekend, the duo was a perfect match for the PlayStation stage, which has become a world music showcase of sorts at the fest each year—the Wailers, Zap Mama and Jimmy Cliff have delivered performances there, and A&M themselves appeared on the same stage four years back. This year's Folila is A&M's first album since then, bringing on more higher-profile guests including members of TV on the Radio and Perry's headliner Santigold among them, braiding more Western influences into its signature loping rhythms. It hardly mattered that singer-guitarist Amadou Bagayoko wasn't fluent enough in English to toss around any stage banter. His pointillistic guitar solos did the talking here.