Roseburg High School’s choir will put on a free winter concert 7 p.m. Dec. 20 in the Rose Theater at Roseburg High, 400 W. Harvard Ave. Doors open at 6:45 p.m. The choirs that will perform are Ambiance, a 71-member voice chamber choir; the Advance Women’s Ensemble; New Voice, a show choir; and Vocal Fusion, a 14-member a cappella group. Although the concert is free, donations toward the choir program will be accepted. …