Punch Brothers third Nonesuch disc, WHO'S FEELING YOUNG NOW?, recorded in Nashville and produced and engineered by Jacquire King (Tom Waits, Kings of Leon, Modest Mouse, Josh Ritter), contains some of the most exhilaratingly direct, sonically daring performances the group has ever recorded. As the five members have matured together on the road and in the studio, their approach to writing and performing has, conversely, become looser, simpler, and, as the album title suggests, more unaffectedly youthful. At this point, virtuosity is a given among these already prodigious players; the operative word for WHO'S FEELING YOUNG NOW? is camaraderie.