“We are The Knights,” the ensemble would have you know. “Flexible in size and repertory, The Knights are dedicated to transforming the orchestral experience and eliminating barriers between audience and music. Led by an open-minded spirit of camaraderie and collaboration, we seek to engage with contemporary culture through vibrant performances that honor the classical tradition and our passion for musical discovery.” The Knights’ Leap Year Special in Carnegie Hall’s underground space offers very French Ravel (Le Tombeau de Couperin), very Weimar Weill (Berliner Sinfonie, “Alabama Song”), plus arrangements of songs by Bob Dylan and Chico Buarque, of Brazil. But the principal novelty of the evening is the Pulitzer Prize-winning Du Yun’s new concerto Ears of the Book. Wu Man, the world’s foremost exponent of the four-string Chinese lute known as the pipa, is the soloist. —Matthew Gurewitsch