“The double-keyboard piano sounds like a piano, but with fuller chords and denser harmonies. Unlike an organ with additional stops and pipes or a harpsichord with separate strings for the second manual, the double-keyboard piano still has only one set of hammers and strings. And Christopher Taylor still has only 10 fingers. But the two keyboards, one with the usual 88 notes, the other with only 76, lets him try some intriguing moves.”