Review by Allan Kozinn in NY Times: Jeffrey Kahane offered glimpses of both the past and a possible future in his perfor­mance with the New York Phil­har­monic at Avery Fisher Hall on Tuesday evening. In the first half of the program he conducted works by Bach and Mozart from the harp­si­chord, a nod to the prac­tice of the time, and later he was both soloist and conductor in Beethoven’s Piano Concerto No. 1. He played the Beethoven from memory, but for the Mozart, he used an iPad instead of a conven­tional score. Seeing the device perched on the harpsichord’s music stand called to mind the cover of Wendy Carlos’s “Switched-On Bach” album, on which the bewigged composer stands before a Moog synthe­sizer, though the iPad is elegantly minia­ture by compar­ison. · Go to Clas­sical conducting? There’s an App for that →