Local and national artists use historical and modern performance practices for J.S. Bach's Mass in B-minor. Performances are at 7 p.m., Friday, Feb. 18, St. Francis in the Valley Episcopal Church (600 S. La Cañada Drive, Green Valley); 7:30 p.m., Saturday, Feb. 19, Catalina Foothills High School Auditorium (4300 E. Sunrise Drive); and 2 p.m., Sunday, Feb. 20, at Grace St. Paul's Episcopal Church (2331 E. Adams St.). $20 and $30; free child and student. Call 401-2651, or visit tucsonchamberartists.org for tickets and more information.