70-voice chorus plus strings performs Pergolesi's The Magnificat, Thompson's Frostiana, and short works by J.S. Bach; Anita Anderson Cooper conducts; General admission tickets $25 at door ($20 pre-sale), Senior citizens $20 at door ($15 pre-sale), Students and Children $5 at door and pre-sale; Pre-sale tickets available from Chorale members, at Odyssey Bookshop in South Hadley, and at www.eventbrite.com.