"The Dreamachine was conceived by artist painter and writer Brion Gysin, along with his friend Ian Sommerville, in the early sixties. It is the first object in history designed to be viewed with closed eyes.
The Dreamachine simply consists in a cylinder with holes cut into his sides and placed on a turntable. A lightbulb is suspended on the center of the spinning cylinder, and the rotation lets the light to pass through the holes at a constant frequency, situated between 8 and 13 pulses per second. This frequency range corresponds to the 'alpha waves', electrical oscillations naturally present in human brain when the eyes are closed and no stimuli are processed, e.g., when there's a relaxed and effortless alertness, and while meditating."(importantrecords.com)
Created in the 1960's they were used by William S. Burroughs and thousands of other psychedelic pioneers to induce visionary states without chemicals.
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