Dinnerstein's seriousness of purpose is immediately obvious from her choice of the Bach masterpiece to make her mark. With the specter of Glenn Gould's own epoch-making 1955 debut playing the same work—not to mention a vast catalog of competing interpretations—Dinnerstein is nothing if not bold. But what's really extraordinary here is the liberating sense she conveys of its not having all been said before—without resorting to tiresome idiosyncrasies to stand apart from the crowd. Her remarkably deliberate way with the opening aria is unusual, to be sure. But it establishes the stakes for what will follow, where Dinnerstein's thoughtfulness and spectacular clarity seem to discover new facets at every turn. Her pianism embraces a prismatic array of touches, whether the feathery lightness of Variation 5, the burbling rhythms of Variation 14, or the tragic weight of the "black pearl" Variation 25. The cumulative effect is exhilarating, intensely moving, and an affirmation of the Goldbergs' infinite variety. --Thomas May