Ordinarily, one of the worst things that can happen at a classical concert is when someone in the audience starts singing or humming along to the music. But that's the desired outcome on Sunday, when the excellent Cathedral Choral Society performs Mozart's Requiem in the exquisite vastness of Washington National Cathedral.
The audience is invited to chime in for all the choral passages as J. Reilly Lewis conducts the stirring, noble score that Mozart did not live to complete. The solos will be sung by soprano Laura Lewis, mezzo Barbara Hollinshead, tenor Robert Petillo and bass James Shaffran. The $10 admission fee includes rental of a score for this sing-along-with-Mozart event, which starts at 5:30 p.m. Sunday.