Osmo Vänskä conducts the Minnesota Orchestra in Havana, Cuba in May 2015. Yamil Lage/AFP/Getty Images hide caption
Composer Terry Riley (center) celebrates his 50th birthday in 1985 with his muses in the Kronos Quartet (from left) David Harrington, John Sherba, Hank Dutt and Joan Jeanrenaud. Richard McCaffrey/Courtesy of Kronos Quartet hide caption
An incredible roster of musicians gathered at Carnegie Hall in 2009 to play Terry Riley's epic 'In C' — with the complete, but only single-page, score projected overhead. Julien Jourdes/courtesy of Carnegie Hall Archive hide caption
Inuksuit (excerpt)
Cellist Pablo Casals, violinist Fritz Kreisler, pianist Harold Bauer and conductor Walter Damrosch in 1904. Blaine Littell Collection of Walter Damrosch Memorabilia / Carnegie Hall Archives hide caption
The Nashville Symphony with Music Director Giancarlo Guerrero (center) during Spring For Music at Carnegie Hall in Manhattan, New York on May 12, 2012. Melanie Burford/NPR hide caption
Over four decades, the Kronos quartet (from left, John Sherba, Sunny Yang, Hank Dutt and David Harrington) has premiered more than 800 pieces. Jay Blakesberg hide caption
Big Boi and Terry Riley: You didn't see this one coming, did you? courtesy of the artists hide caption