 It emphasized brief and repeated synthesizer lines with minimal rhythmic changes and occasional synthesizer atmospherics, with the aim of putting listeners into a trance-like state.Derived from acid house and techno music, it developed in Germany and the Netherlands with singles including "Energy Flash" by Joey Beltram and "The Ravesignal" by CJ Bolland.This was followed by releases by Robert Leiner, Sun Electric, Aphex Twin and most influentially the techno-trance released by the Harthouse label, including the much emulated "Acperience 1" (1992) by duo Hardfloor.