Cantus Singers and Shenandoah Chorus will begin at 8 p.m. in the Armstrong Concert Hall. Cantus Singers and Shenandoah Chorus perform music with texts by Langston Hughes and by featured composers including William Averitt, Dave Brubeck, Gwyneth Walker and Rollo Dilworth. Tickets are $12 for adults, $10 for senior citizens and $5 for non-SU students. Purchase tickets at the Ohrstrom-Bryant Theatre box office; hour of operation are 10 a.m. to 6 p.m. Monday through Friday and two hours before this concert at the performance venue. All Shenandoah employees can pick up free tickets for performances at any time. Free “rush” tickets are available to SU students two hours prior to this performance. For more information, call 540/665-4569 or go to www.conservatoryperforms.org.