"More than anything, rave was an intentionally designed experience. The music, lighting, and ambience were all fine-tuned to elicit and augment altered states of consciousness. The rhythm of the music was precisely 120 beats per minute, the frequency of the fetal heart rate, and the same beat believed to be used by South American shamans to bring their tribes into a trance state. Through dancing together, without prescribed movements, or even partners, rave dancers sought to reach group consciousness on a level they had never experienced before."