If twelve hours of Bach in a chapel doesn’t fulfill your required weekly intake of ol’ Johann, then you’re probably very disappointed most of the time. But not this week! The Providence Singers have come to your rescue, performing Bach’s Cantata No. 140 (“Wachet Auf”) along with Mozart’s Coronation Mass and Vivaldi’s Gloria. Tickets are cheaper than staying in town for Comic Con, and student tickets are only five dollars.