O magnum misterium combines the old with the new. On this CD of English carols from the 20th century, Polyphony interpolates Sarum chant to create a magnificent Christmas program. The carols were written by various English composers such as Herbert Howells, Peter Warlock and Richard Rodney Bennett and exemplify the great connection the English have with choral music. The Sarum chant, which was used at Salisbury Cathedral in place of the traditional Roman liturgy, is used purely to relieve the ear from the indulgent sounds of the carols. This CD includes Howells "A Spotless Rose" and "Sing Lullaby" which are possibly better known, but all of the songs are equally beautiful.