The Ambassadors of Harmony fills the Blanche M. Touhill Performing Arts Center each December with the joy and magic of the holidays in a way only achieved by a 160-voice chorus. The choral group will perform it’s annual “Sounds of the Season” concert at 8 p.m. Dec. 7, 2 and 8 p.m. Dec. 8 and 2 and 7 p.m. Dec. 9 at the Touhill at the University of Missouri–St. Louis.