This conference on sound reinforcement is a follow-up to the 2015 conference in Montreal and will focus on sound reinforcement in the open air. It will bring together recognized hands-on experienced practitioners, scientific experts, self-taught gurus, young technicians, and students in a creative environment. There will be workshops, demonstrations, and live experiments combined with paper presentations, engineering briefs, and tutorials. Live performances will demonstrate the most advanced and up-to-date sound systems operated by renowned sound engineers on an outdoor stage. Technical papers and tutorials will be presented by recognized sound system designers and acoustics specialists. A one-track scheduling format is planned. However, it is expected that parallel tracks for various hands-on sessions and demonstrations as well as theoretical sessions can be organized to suit individual preferences.