Michael Tilson Thomas and the San Francisco Symphony, whose recording of music by John Adams made our Top 10 of 2012. Bill Swerbenski/courtesy of the artists hide caption

itoggle caption Bill Swerbenski/courtesy of the artists

To mark the group's 25th anniversary, Anonymous 4 commissioned the new piece love fail from Pulitzer Prize-winning composer David Lang. Chris Carroll/Brooklyn Academy of Music hide caption

itoggle caption Chris Carroll/Brooklyn Academy of Music

The London-based a cappella choir Stile Antico brings a program of Christmas music to Cambridge, Mass. Marco Borggreve hide caption

itoggle caption Marco Borggreve

Cellist Alisa Weilerstein Jamie Jung/Courtesy of the artist hide caption

itoggle caption Jamie Jung/Courtesy of the artist

A 1910 portrait of King George V in procession. A new album of choral works by Hubert Parry features music he wrote for the king's coronation one year later. Chandos Records hide caption

itoggle caption Chandos Records

The New York Philharmonic performing at the current incarnation of Avery Fisher Hall in January 2011. Chris Lee/courtesy of the New York Philharmonic hide caption

itoggle caption Chris Lee/courtesy of the New York Philharmonic

After years of waiting, the Kennedy Center has a new symphonic organ replacing its old Filene organ. The $2 million project will culminate in the organ's debut on Nov. 27. William Neil (left), the National Symphony Orchestra organist, speaks with NSO Assistant Conductor Ankush Kumar Bahl (center) during the organ's test with the orchestra on Oct. 18. Kainaz Amaria/NPR hide caption

itoggle caption Kainaz Amaria/NPR

Does This Guy Matter? Conductor Leonard Bernstein during rehearsal with the Cincinnati Symphony at Carnegie Hall in 1977. James Garrett/New York Daily News via Getty Images hide caption

itoggle caption James Garrett/New York Daily News via Getty Images

Dutch composer Michel van der Aa, winner of the 2013 Grawemeyer Award for Music Composition. Marco Borggreve/courtesy of the artist hide caption

itoggle caption Marco Borggreve/courtesy of the artist

President Nixon pardons a turkey in 1969. There's quite a celebratory banquet scene in the John Adams opera, Nixon in China. Nixon White House Photographs Series/The U.S. National Archives via Flickr hide caption

itoggle caption Nixon White House Photographs Series/The U.S. National Archives via Flickr

Composer Max Richter's new album takes on Vivaldi's Four Seasons. Erik Weiss/Courtesy of the artist hide caption

itoggle caption Erik Weiss/Courtesy of the artist

Chopin, whose Ballade No. 1 in g minor is one of the "musical moments" that inspired a New York Times series. Hulton Archive/Getty Images hide caption

itoggle caption Hulton Archive/Getty Images

As a young classical composer, Missy Mazzoli borrows music and business strategies from the indie rock world. Stephen Taylor hide caption

itoggle caption Stephen Taylor

The special effects in Carl Philipp Emanuel Bach's music helped forge a new cutting-edge style. /De Agostini/Getty Images hide caption

itoggle caption /De Agostini/Getty Images

John Eliot Gardiner leads the Orchestre Revolutionnaire et Romantique and the Monteverdi Choir at Carnegie Hall in New York, NY on November 17, 2012. Melanie Burford for NPR hide caption

itoggle caption Melanie Burford for NPR