Master Chorale, UND Concert Choir will perform May 1 Grand Forks Master Chorale and UND Concert Choir present "All-Night Vigil" by Sergei Rachmaninoff at St. Michael's Catholic Church, Friday, May 1, at 8 p.m. The concert artistic director is UND Assistant Professor Joshua Bronfman. -- Joshua Bronfman, Asst. Professor, Music, michelleluciaingle@gmail.com, 701-741-1786