The title of the third Punch Brothers disc for Nonesuch, borrowed from one of their new songs, is more an exhortation than a taunt. Who’s Feeling Young Now?, produced and engineered by Jacquire King, contains some of the most exhilaratingly direct, sonically daring performances the group has ever recorded. As the five members, ranging in age from their mid-20s to early 30s, have matured together on the road and in the studio, their approach to writing and performing has, conversely, become looser, simpler, and, in a sense, more unaffectedly youthful. The title song—featuring rumbling bass, skittering violin, and wailing multi-tracked vocals—sounds like hard-charging string-band punk rock. Opening track “Movement and Location” feels like Steve Reich–inspired indie rock, with rhythmically pulsing guitar, bass, and banjo lines and the same flying-by-the-seat-of-the-pants spirit.