"And now it gets spooky. I have a recording of the piano rolls Gershwin cut, his own performance of his work as he heard it in his head – fast, nervy, heedless. The rolls were fed into modern computer-assisted pianos capable of reproducing dynamics, and the results are remarkable. But as this short video shows you, it’s like a seance. No: it’s like those plaster casts of the victims of Pompeii. You know the story: they were buried in rock and ash, the bodies evaporated, and centuries later they poured plaster into the empty spaces to define the shape left by the vacant soul. It’s like that. He’s here. But he’s not."