National Symphony Orchestra
The National Symphony Orchestra (NSO), founded in 1931, is an American symphony orchestra based in Washington, D.C.. Its principal performing venue is the John F. Kennedy Center for the Performing Arts.
Seattle Youth Symphony Orchestras
For its first two years, it was called the Youth Symphony Orchestra of Seattle. From 1944 to 1963, it was the Youth Symphony Orchestra of the Pacific Northwest. Vilem Sokol led the orchestra for 28 years (1960-1988), and it was under him that the YSO became the fourth orchestra in the United States to perform Gustav Mahler's Tenth Symphony. After the London Symphony Orchestra gave its premiere, the Philadelphia Orchestra, the Chicago Symphony Orchestra, and the San Francisco Symphony had been the only orchestras in the world to have performed the work. Under conductor Sokol, the Seattle Youth Symphony Orchestra made two recordings of Mahler's Tenth Symphony in its entirety.