Knussen was to have conducted two concerts at the festival, which runs June 9-12. Grant Gershon, music director of the Los Angeles Master Chorale, will replace him for a concert on June 11; Brad Lubman, a longtime associate of Knussen and a new-music veteran, will step in on June 12.

The programs remain unchanged, with music by Mauricio Kagel and Percy Grainger on June 11 and Knussen's Violin Concerto, a world premiere by Jonathan Cole, and works by Stravinsky, Lucas Foss, and Ravel on June 12. Peter Serkin is the piano soloist in the latter concert; William Preucil is the violinist.