For anyone who has endured clichéd, condescending, uncomprehending, or otherwise aggravating depictions of classical music in American TV ads—the snobs at the symphony, the sopranos screaming under Valkyrie helmets, the badly edited bowdlerizations of the “Ode to Joy”—a new ad for the Apple iPad featuring the conductor and composer Esa-Pekka Salonen may come as a pleasant shock. It is, first of all, a cool, elegant piece of work—not surprising, given Apple’s distinguished history of television propaganda. Salonen is shown receiving inspiration for a passage in his Violin Concerto and trying it out in his iPad; then, after a montage of scenes in London and Finland, we see the violinist Leila Josefowicz and the Philharmonia Orchestra, of London, digging in to the score. More notably, it is musical: the concerto dictates the rhythm of the editing, and the correlation between notation and sound is made excitingly clear.