The centerpiece of the Bach collection is a 2015 recording of The Well-Tempered Clavier, the so- called old testament of piano music, a series of 48 preludes and fugues in all of the piano's possible keys. A look at that monumental collection's recorded history could serve as a compendium of piano performance styles through the last 120 years. Unsurprisingly, Biret conforms to none, and perhaps the best way to describe her interpretations is orchestral. As the historically informed Baroque practitioners prescribe, each prelude and fugue certainly has a distinct character, but those long lines emerge with the definition of strings, brass or winds, lush and strident by turn. Trills are mellow and exquisitely shaped, and a wealth of detail is present but never exaggerated. Biret's Bach is a cliff wall to be scaled, a peak to be reached and an aspiration to be achieved.