Conducted and cofounded by one of Chicago’s most intelligent musicians, Elaine Scott Banks, the City Musick has put Chicago on the early music map in terms of authentic-instrument performance. This sparkling ensemble peels centuries of misconception off of baroque works like grime off a Rembrandt. Their season finale is a real stunner: the American original-instrument premier of Mozart’s Requiem, featuring an outstanding quartet of soloists: Juliette Hayes, Joy Huston, Thomas Heilman, and Wilbur Pauley. Banks is relying on Richard Maunder’s new critical edition of the work Mozart didn’t live to finish, and the result is guaranteed 100 percent Mozart: not only in notes, but in unparalleled spirit. Sunday, 8:15 PM, Saint Michael’s Church, 1633 N. Cleveland; 642-1766.