The 2012-2013 Music at Amherst Chamber Series concludes with The Tetzlaff Ensemble’s performance of works by Widmann, Mozart and Messiaen on Friday, April 19 at 8 p.m. in Buckley Recital Hall in the Arms Music Center at Amherst College. The performance requires tickets and seating is assigned. Tickets may be reserved beginning April 8 by visiting http://amherst.universitytickets.com or calling 413/542-2195.