Tues., May 07, the Infamous Stringdusters

Harlow's Restraurant & Nightclub, 8 p.m., $18-$20

Photo By Tom Daly

Progressive bluegrass act the Infamous Stringdusters formed eight years ago after the annual migration of Berklee College of Music grads to Nashville, Tenn. That's how banjo player Chris Pandolfi and since-departed guitarist Chris Eldridge (Punch Brothers) met dobro player Andy Hall. Their first two albums explored the confines of lonely, harmony-laden string music, and the third, 2010's Things That Fly, widened sonically (incorporating organ and viola) and stylistically (covering U2's “In God's Country.”). The fourth disc, Silver Sky, blends those initial country inspirations with the pop and rock elements that emerged on the last album, finding a nice balance of hooks and rusticity. 2708 J Street, http://thestringdusters.com.