Wednesdays in Wiedemann with Lynne Davis presents its annual Christmas Organ Concert on the Marcussen organ at 5:15 p.m. Wednesday, Dec. 6 in Wiedemann Hall. Admission is available at no additional charge to hear and participate in the yearly event, which includes audience singing of beloved songs and carols as well as works on the organ and for solo voice with Alan Held and Hilary Taylor, both from the voice faculty at the School of Music. The event will be live-streamed on the School of Music Facebook page.