Dunkelziffer is one of the scenes most influential electro band's sixth studio album. Gigs, festivals and tours carried the name [:SITD:] around the world. Their club hits as Snuff Machinery, Laughingstock, Richtfest I & II, Kreuzgang and Rot are milestones, and timeless classics on international dance floors. 
In [:SITD:]'s cosmos various electronic styles melt into a sinister fascinating opus with an unmistakable signature. Their equally sweeping and hymnlike melodies, supported by hammering beats and driving grooves, have become a unique trademark. The three protagonists Carsten Jacek, Tom Lesczenski, and Francesco D'Angelo reinvent themselves time and again without denying their musical roots. With Dunkelziffer the trio presents itself at the peak of their creative endeavors. Gloomily, powerfully, and morbidly the new songs amount to a menacing thunderstorm, while the lyrics keep digging heavily and deeply in the furtive, ruthlessly revealing the abyss of the human psyche.