Each year the Martina Arroyo Foundation, directed by the renowned American soprano who is its namesake, offers fully staged productions featuring talented young singers from the organization's Prelude to Performance training program. This season the lineup includes 'La Traviata' (7:30 p.m. Saturday) and 'The Barber of Seville' (7:30 p.m. on Friday and 2:30 p.m. on Sunday).