At least since 1966, when a staff producer and arranger at Elektra Records named Joshua Rifkin took advantage of the then-current revival of interest in 17th century music to create The Baroque Beatles Book, the idea of classical musicians playing rock & roll has generally been treated as a novelty. Even when the Kronos Quartet used to encore their recitals of 20th century music with a reconstruction of Jimi Hendrix's "Purple Haze" back in the 1980s, it was done with a nod and wink. However, there have occasionally been more serious crossovers from classical into pop, such as ...