Josh Carter and Sarah Barthel, the Greenwich, New York-bred duo known as Phantogram, brought their unique blend of swirling guitars, genre-spanning samples, and breathy vocals to a sold-out crowd at Chicago’s Riviera Theatre Thursday night. Largely pulling from their sophomore LP, this year’s stellarĀ Voices, the pair also peppered in favorites from their previous EPs and debut album, such as “Don’t Move,” “Mouth Full of Diamonds,” and “When I’m Small” amid strobing lights and clouds of smoke.