Chris Thile's new album, Sonatas and Partitas, draws from material written by Johann Sebastian Bach in the early 1700s. Brantley Gutierrez /Courtesy of the artist hide caption

itoggle caption Brantley Gutierrez /Courtesy of the artist

Chris Thile and his Punch Brothers kick off the festivities at the "That" tent at the Bonnaroo Music and Arts Festival in Manchester, Tenn. Wills Glasspiegel hide caption

itoggle caption Wills Glasspiegel