The saxophone-and-piano duet is a tricky form. Only partnerships as exceptional as Andrew McCormack and Jason Yarde could undertake music like this, with its open structures and wide range of moods and textures. The compositions are by one or the other or both of them together, and the rapport is so close that where the composing leaves off and the improvisation begins is impossible to tell. Yarde, playing soprano and alto saxophones, is quite dazzling at times, and his tone blends superbly with McCormack's piano voicings. Jazz or classical, this is in a class of its own.