Caption: The Earth Harp by the Music Architecture Sonic Sculpture (MASS) Ensemble transformed the Temple into a gigantic musical instrument.
Strings extended across the playa from a performance platform to the base of the central tower.
Interestingly the strings were actually played by friction, not by plucking, making it almost a sort of hand-bowed violin than a harp. It sounded a bit like a cello being played at the upper end of its register.