This week’s theme: Duets. Featured artists include John Cotrane, McCoy Tyner, Sonny Rollins, Philly Joe Jones, Dizzy Gillespie, Oscar Peterson, Art Pepper, George Cables, Al Cohn, Jimmy Rowles, Tal Farlow, Dan Axelrod, Stephane Grappelli, Marc Fosset, Zoot Sims, Bucky Pizzarelli, John Lewis, Hank Jones, George Shearing, Carmen McRae, Rosemary Clooeny, Ed Bickert, Nancy Lamott, Christopher Marlowe, Ken Sebesky.