Genius in performance doesn’t depend on the prestige of the medium. It’s not a question of observing the rules or ignoring the rules. It can look (or be!) dizzy or deadly earnest. Maybe what strikes the spark is the fusion of intent and technique. In the musicians of Punch Brothers, the homespun art of bluegrass has virtuosi who make this crazy wonder happen. Join Chris Thile on mandolin (mandolin!) and vocals, Chris Eldridge on guitar, Paul Kowert on bass, Noam Pikelny on banjo, and (honorary “brother”) Brittany Haas on violin for a blast of what the Washington Post hails as bluegrass taken to “its next evolutionary stage, drawing equal inspiration from the brain and the heart.” Tracks from The Unsung Adventures of Punch Brothers, released in July, will mix and match with hits from the entire back catalogue. —Matthew Gurewitsch