Komposition No. 1
2006
Soprano overtone singer solo
Anna-Maria Hefele in Light&Abyss by Y. Pouget
O Antiqui Sancti – Ordo Virtutum
2013
Based on Hildegard von Bingen, Ordo Virtutum
Soprano overtone singer solo
O Antiqui Sancti - polyphonic overtone singing - by Anna-Maria Hefele
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