Perpetuum Mobile at Ars Electronica 2017 7 - 11 September 2017 View fullsize The 12 channel installation on the rooftop of Postcity, the main venue of Ars Electronica View fullsize Checking equipment before installing View fullsize The ground on the Postcity roof top View fullsize Installing on the rooftop View fullsize View fullsize Surrounded by sound and sky, just before closing time View fullsize Closing time, speakers bagged Ars Electronica flickr page View fullsize View fullsize Visitors surrounded by sound View fullsize