The Philly four-piece Univox bring a refreshing interpretation of rock ‘n roll to their live performance. They can blister through songs with some serious ferocity often driven by the band’s sturdy backbone drummer Kent Boersma. When their music swells and you find yourself amidst joyous multi-layered harmonies, you can only grin because you know that you are experiencing something that is truly over the top in a good way. Univox will be joined tonight at the North Star by Thinking Machines, Br’er and an interesting new outfit from Chicago, Ornery Little Darlings. North Star Bar, 2639 Poplar St., 9pm, $8, 21+ myspace.com/univoxmusic – H.M. Kauffman