This was the largest sound installation in the world, consisting of six PA speakers in a 6.9 acre Neolithic site encircled by an 11 foot high bank. The event took place in the late afternoon and evening, so by dusk and moon light, the audience circled the site and were surrounded by sounds reflecting the ancient sacredness of the location.
Listen to BBC arts show here: https://soundcloud.com/magikdoor/the-stone-tapes-on-the-bbc-arts-show
and here on other BBC : https://soundcloud.com/magikdoor/augustine-leudar-bbc
And read a review from the Visual Art Ireland newsletter (May 2016) here (Click twice to enlarge) :