There is not a lot of notated overtone music out there, particularly for choirs. And even less so when it comes to polyphonic singing.
In the earliest days of the appearance of composed western overtone music, there was Folke Rabe and Stockhausen.
Later on, Sarah Hopkins (Australia) created 'Past Life Melodies', which became internationally known and performed by many choirs around the world. Many such choirs were not overtone choirs, per se, but her piece did not require… Continue