Rising U.K. artist Michael Kiwanuka hit like clockwork immediately following the modern rock hybrid delivered by Brazil's O Rappa. Compared to that band's glossy, thoroughly contemporary sounds, Kiwanuka felt like a revelation. DJ turntables have no place in the Brit songman's vintage blend. Instead, the talented 24-year-old worked in wispy threads of elegant folk-rock, summoning the '60s and '70s with his easy delivery. The warm, wafting breeze felt like a natural pairing with Kiwanuka's disarming croon. Strapping on an acoustic guitar for a confident run through "Tell Me a Tale," the young singer-guitarist and his band offered a potent reminder of how simple and modest music festivals used to be (perhaps underscored by the fact that he was performing in the well-worn Petrillo Music Shell, known as the PlayStation stage for the next three days). A simple backdrop told us who we were watching; no charged-up light show needed—though a smoke machine was steaming quietly in the periphery, unnecessarily. A hat tip to Hendrix followed with an energetic cover of "May This Be Love," before the band dove into a comforting rendition of "I'm Getting Ready." By that point the promising songwriter was playing to exponentially more people than at the start. With his honest words and presentation, winning over a few new fans seems inevitable.