O Antiqui Sancti polyphonic overtone singing Anna Maria Hefele

our ECM album finally got released more info: AnnaMaria Hefele, Video: Thomas Radlwimmer, Audio: Florian Zack, more info: sign up for my newsletter O Antiqui Sancti by Hildegard von Bingen (10981179) out of Ordo Virtutum adapted for polyphonic overtone singing by AnnaMaria Hefele. O antiqui sancti, quid admiramini in nobis Verbum