laid the foundations of the dark electro movement in the early 1990s, and were the first artist on the German label Celtic Circle Productions. In subsequent years, dark electro was displaced by techno-influenced styles such as aggrotech and futurepop. Other groups to practice the style included amGod, Trial, early Evil's Toy, Mortal Constraint, Arcana Obscura, Splatter Squall, Seven Trees, Tri-State, and Ice Ages. Aggrotech Aggrotech (also known as Terror EBM and hellektro) is a derivative form of dark-electro with a strong influence from industrial hardcore (straight techno bassdrum from Roland TR-909 and oscillator sounds, especially Supersaw leads from Roland JP-8000) that first surfaced in the mid-late-1990s. Aggrotech typically employs aggressive beats, prominent lead synth lines, and lyrics of a dark nature. Often, vocals are distorted and pitch-shifted to sound harsh and synthetic; static and glitching effects are also added. Aggrotech musicians include Agonoize, Alien Vampires, Amduscia, Bestias De Asalto, Cenobita, Chiasm, Die Sektor, Combichrist, Dawn of Ashes, Detroit Diesel, Dulce Liquido, DYM, Feindflug, God Module, Grendel, Hocico, iVardensphere, Nachtmahr, Machine Sonata, Panic Lift, Psyclon Nine, Reaper, Suicide Commando, Tactical Sekt, Tamtrum, The Retrosic, Ritual Aesthetic, Unter Null, Virtual Embrace, and X-Fusion, among many. See also List of industrial music festivals List of electro-industrial bands References Industrial music Electronic music genres de:Electro (Sammelbezeichnung)#Electro-Industrial