Berlin Atonal started out in 1982, but took a break through the 90s and 00s. The festival is back now, in 2013 and again this summer. Reviews here and here. Sadly none of the reviewers were present at the Biosphere 4D event on Friday. We were in a dark landscape of treelike "sound poles" … compared to Senking on Saturday Biosphere used real sounds like helicopters, bee swarms and the thrilling sound of falling pebbles.