Some of the most beautiful music in the world can be heard in a performance of Rachmaninoff's Vespers. Better to be described as an All-night vigil, Rachmaninoff uses Russian melodies dating from the Byzantine era. In the Eastern Church, the All-night vigil is observed before religious feasts. This piece is difficult for any non-Russian choir due to the language. The Dale Warland Singers sing with great energy and beautiful dark tones as befits the Russian style.