Psychedelic trance or psytrance is a form of electronic music that evolved from Goa trance in the early 1990s when it first began hitting the mainstream. The original Goa trance was often made with popular Modular synthesizers and hardware samplers, but the preference in Psychedelic trance has moved to sample manipulation and storage in VST and AU software sampler applications. The use of analog synthesizers for sound synthesis has given way to digital "virtual analog" instruments. (source: Wikipedia)