From the Remnick article (with bonus Monk anecdote!):
Musicians were beginning to tune in. During a Thelonious Monk festival, one of the d.j.s went on about how Monk created art out of “wrong notes.” Monk, who rarely spoke to anyone, much less a college student, called the station and, on the air, declared, “The piano ain’t got no wrong notes.” In 1979, Schaap was at the center of a Miles Davis festival at a time when Davis was a near-recluse living off Riverside Drive. Davis started calling the station, dozens and dozens of calls—“mad, foul, strange calls,” Schaap recalled. Davis’s inimitable voice, low and sandpapery, was unnerving for Schaap. But then one day—“Friday, July 6, 1979”—his tone changed, and for nearly three hours the two men went over the details of “Agharta,” one of his later albums. Finally, after Schaap had clarified every spelling, every detail, Davis said, “You got it? Good. Now forget it. Play ‘Sketches of Spain’! Right now!”