You can hear people building up the sound sculpture Tvísöngur by the German artist Lukas Kühne. (beautiful Seyðisfjörður, Iceland)
Further links:
http://skaftfell.is/2012/08/tvisongur-opnun/
http://konradkorabiewski.blog.com/2012/09/02/tvisongur-sound-sculpture-lukas-kuhne-opening/