In 1925 the Associated Glee Clubs of America put on a concert like no other. 15 choral groups, with over 850 singers in all, came together in New York’s Metropolitan Opera House to sing a program broadcast on radio across America. Portions were electrically recorded, including “Adeste Fideles”, where the audience of 4000 joined in the carol. Lloyd Winstead writes about the record, which is now in the National Recording Registry, and joins the public domain in 7 days. #PublicDomainDayCountdown