To celebrate its 20th year, the Austin Chamber Music Festival is spreading the musical splendor over a period of three weekends in July, with three different concerts each time. The fest is bringing in a remarkable roster of the world’s top classical, jazz and choral musicians. This weekend kicks it off with Peter Bay and the Festival Chamber Orchestra on Friday.

Bay will lead an all-Mozart program that includes “Concerto for Piano in A Major.” The Bad Plus and the Marian Anderson String Quartet play Saturday and Sunday, respectively.

Details: 7:30 p.m. Friday through 3 p.m. July 24. $15-$55. Bates Recital Hall, 2406 Robert Dedman Drive. 512-454-0026,