Natascha Nikeprelevic
Overtone aria ‘Towards the Light’ (Hinwendung zum Licht)

How to call a wild swan with traditional Swedish singing -  Åsa Larsson

Hanna Benn singing Hildegard in St. Ignatius Church in Mainz, Germany
Video by Lena Simon

Hatsune Sings: AGNES x Frances
Hatsune Miku, a Japanese vocaloid, interprets a Skype conversation between AGNES and the artist Frances Stark.
Cécile B. Evans (2014)
Art Papers

Bells from the Deep: Faith and Superstition in Russia (1993)