Salve Regina was originally written for male chorus. Shortly thereafter, a version for mixed chorus was composed. This arrangement is more sonorous due to the divisi writing in all sections and the greater variety of combinations possible with a mixed chorus. All this results in a beautiful full sound. Although the composition is entirely original, there are two very short moments in the piece when Mr. Carrillo gives tribute to two great composers of choral music: Anton Bruckner and Francis Poulenc.