Singing into spring, The Assabet Valley Mastersingers will present Songs of Ecstasy featuring For a Breath of Ecstasy by Michael J. Trotta and Carmina Burana by Carl Orff. The concert will be held at Algonquin Regional High School, 79 Barlett Street, on Sunday, March 20 at 3:30 p.m. Dr. Robert P. Eaton will conduct the ensemble and soloists accompanied by two pianos, an oboe and five percussionists.