The cascade of shifting flute-like harmonics heard here are played on four varying tuned lengths of flexible convoluted hose (whirlies), that when whirled above the head, “sing” the overtone series, depending on how fast one whirls. In short, one could call this Whirled Music.
Mark Cain is an Australian woodwind specialist who also plays a variety of ethnic wind instruments and reed instruments of his own invention. Cain performs and records with the group, EASTWINDS (see also on Bandcamp) and founded DARAMAD (also on Bandcamp).