Hildegard was one of the most prominent composers from the middle ages. Hildegard's music rises to the level of sacrament from the divine of grace to the heavenly choirs down to us. Not only she was a composer, she was a writer, and a philosopher.
The instrumentation used in this piece is a women's choir which all sing in soprano. The singers in the piece blend together so perfectly creating a unified powerful texture to the piece. The tempo was basically slow throughout