This is a one minute sample of a religious chant "O Ignis Spiritus" written by Hildegard de Bingen from the CD Songs of Hildegard von Bingen. Hildegard has been getting more popular with New Age composers as the years go by, she celebrated a 500th Anniversary not long ago. These arrangements by the Air Ensemble offer a fine selection of the her songs. It's the sound of singing angels, captured in a cathedral of soft tones and slow rhythms, have a listen. This is among Europe's oldest recorded music.