To classify this Mozart release by Dutch pianist Daria van den Bercken might mean putting it under the heading of modern-piano interpretations influenced by the historical-performance movement. Van den Bercken herself says in her notes that although she comes "up against a wall" when she plays Mozart on a fortepiano, she admires and has been inspired by the work of fortepianist Malcolm Bilson and conductor Nikolaus Harnoncourt. Her Mozart is sharply articulated and only lightly pedaled. On another level, though, her readings owe little to historically oriented performances. The "keys to Mozart" in the album title are pretty general (look to opera to understand Mozart's melodies), but van den Bercken's readings are individual and very finely wrought.