Gustavo Dudamel

Gustavo Dudamel conducting the L.A. Phil. Dudamel is among the Deutsche Grammophon artists. (Lawrence K. Ho / Los Angeles Times / February 21, 2013)

The venerable German record label Deutsche Grammophon has just signed Schiller. No, not Friedrich Schiller, the poet and playwright whose "Ode to Joy" is the text for the last movement of Beethoven's Ninth Symphony (which has been recorded on DG by Karajan, Bernstein and many other major maestros). We're talking the platinum-selling German electronica band Schiller, which is named after said Friedrich.

Classical music mavens online are outraged. Bloggers, ever busy bees, buzz.

But perhaps some of that platinum will underwrite expensive major projects from Esa-Pekka Salonen and Gustavo Dudamel, both of whom are DG artists. Letting pop pay the classical piper is a time-honored tradition. We can thank pop sales for helping Columbia to record Stravinsky conducting his nearly complete works in the 1960s. Nonesuch Records has operated admirably on this principle for years.

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This latest DG pursuit and the knee-jerk reaction to it are a small instance of the financial or artistic interdependence between classical and pop that goes back to the Dark Ages if not before. The divide then was between Gregorian chant and vernacular music outside the church sung by traveling entertainers known as jongleurs. Eventually, church composers began to use the bass lines of "popular" tunes as a way to keep the masses coming to Mass.

In the funny way things can turn around, the Benedictines of Mary, Queen of Apostles currently serve to chill-out harried 21st century listeners. Their latest CD of chants currently occupies the No. 2 position on the Billboard classical charts, topped by 26-year-old dubstep violinist Lindsey Stirling (that's classical?).

Our age of musical grazing on the Web suggests that anything goes with anything else, just as bacon and olive oil are supposed to be ice cream flavors. In fact, music is a mess at the moment, and the problem seems to be one of division masquerading as unity.

And this only reminds us that that he classical pining for pop, along with pop stars attempting to class up their acts, has quite a history of embarrassing mishmashes, along with the occasional inspired ones. My favorite — the utterly silly "An X-Rated Song," recorded by Ezio Pinza with the Budapest String Quartet in 1943 — is a little of both.

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So far, the contest for most risible classical schlock rock of the year is a toss-up. In "Night," the pianist and Bach specialist Simone Dinnerstein teams up with singer-songwriter Tift Merritt for a feast of sentimentality. I'm not sure where to start with "Great Voices Sing John Denver," maybe with René Pape ridiculously throwing his great bass around "Follow Me" (please don't).

Does anyone remember the venturesome organist, and also Bach specialist, Anthony Newman's infectiously silly 1973 acid-rock song "Barricades," based on Couperin? Then again, that year Barbra Streisand went into the studio to record "Classical Barbra." Who would have expected this funny girl would be exquisite in Debussy or Schubert? Recently remastered by Sony, it sounds gorgeous. Nor would I have predicted that the Spanish soprano with the most ethereal pianissimos, Montserrat Caballé would partner so sensationally with Freddie Mercury.

I hang on to a 1982 LP of heldentenor Peter Hofmann, "Rock Classics," for a hilarious blend of Strauss' "Also Sprach Zarathustra" and "House of the Rising Sun," as I do Brecht's "Baal" with a potent David Bowie, also from 1982. A couple of years later, Philip Glass wrote a symphonic metamorphosis on Bowie's "Low," which started Glass on a symphonic odyssey. He is up to No. 10, which will have its U.S. premiere at the Cabrillo Festival in Santa Cruz next month.

Nothing is more commonplace than the entwining of classical and pop these days. The composer Christopher Rouse happened to be one of the first to offer an academic course in rock music back when he taught at the Eastman School in Rochester, N.Y., in the 1980s. Now he is composer in residence of the New York Philharmonic. Electric guitarists head two of America's most historically significant music departments: the composer Steve Mackey at Princeton and the British pop star Fred Frith at Mills College in Oakland.

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It was at Mills, coincidentally, where the Budapest, having fled war-inflamed Europe, wound up when the quartet shellacked the Pinza novelty. And it was at Mills nearly four decades ago that the Kronos Quartet first began shaking up the stodgy string quartet world with an arresting arrangement of Jimi Hendrix's "Purple Haze," played along side such 20th century masterpieces as Berg's "Lyric Suite."

Age of crossovers

Now everybody's doing that kind of thing. On its latest CD, the popular American male vocal ensemble Cantus squeezes a soupy version of U2's "MLK" between a piece by the Spanish Renaissance composer Tomás Luis de Victoria and "Lift Thine Eyes" from Mendelssohn's "Elijah." No one raises an eyebrow.

Does this mean that we are finally inhabitants of a one world/one music universe?

At the Brooklyn Festival initiated by the Los Angeles Philharmonic earlier this year, young composers asserted that the world has indeed changed.

They are comfortable in both musical worlds and don't like the separate categories. Their remedy all too often, however, is to put all musics through a pop blender. Simplify rhythm and harmony and add a backbeat, which you can do with a machine, and you have the recipe for half the hipster sound in Brooklyn.