The Dream Machine - Alpha and Theta brainwaves! Not suitable for persons with photo-sensitive epilepsy.

 The dreamachine (or dream machine) is a stroboscopic flicker device that produces visual stimuli.

A dreamachine is “viewed” with the eyes closed: the pulsating light stimulates the optical nerve and alters the brain’s electrical oscillations. Users experience increasingly bright, complex patterns of color behind their closed eyelids. The patterns become shapes and symbols, swirling around, until the user feels surrounded by colors. It is claimed that using a dreamachine allows one to enter a hypnagogic state.^[4] This experience may sometimes be quite intense, but to escape from it, one needs only to open one’s eyes.^[1]
A dreamachine may be dangerous for people with photosensitive epilepsy or other nervous disorders. It is thought that one out of 10,000 adults will experience a seizure while viewing the device; about twice as many children will have a similar ill effect.^[5]

The Dream Machine is a device for altering the brainwave frequency of the user and putting it into an alpha state, at which point it begins generating waking, sober hallucinations and internal “movies,” on demand.
The machine is simple: it’s a rotating cylinder with slats in the sides and a light placed inside, that creates a flicker pattern as it spins. The user of the Dream Machine sits in front of it with eyes closed, and allows the precisely-calibrated flicker pattern to play over their face, creating a strobe effect in the darkness behind their eyelids. After a short period of adjustment, the user begins to experience eidetic imagery, in the same way that one does just as passing over the threshold between wakefulness and sleep. (Due to its cylindrical nature and ability to generate internal movies, one might call it the original YouTube.)

 This remarkable and overlooked object was invented in the late 1950s by artistic Renaissance man Brion Gysin and the electronics technician Ian Sommerville. Gysin was expelled from the Surrealist Group by André Breton at the age of 19; with the Dream Machine, he surpassed their previous techniques for image generation. (An example of a prior method is Salvador Dalí’s Paranoiac-Critical exercise, in which the artist would fall asleep in an armchair while holding a rock in his hand and, upon his fingers relaxing and the rock crashing to the ground and waking him, would immediately record what he had just seen.) The Dream Machine allowed for a convenient and immediate way to get at eidetic imagery without having to go to sleep or take chemicals.

Burroughs wrote about Dream Machines extensively in his novels, where he depicted them as a weapon for the freedom of consciousness in the eternal war against Control. The author spoke highly of his friends’ invention, saying: “Subjects report dazzling lights of unearthly brilliance and color… Elaborate geometric constructions of incredible intricacy build up from multidimensional mosaic into living fireballs like the mandalas of Eastern mysticism or resolve momentarily into apparently individual images and powerfully dramatic scenes like brightly colored dreams.”
The machine was officially unveiled in 1962, at the Louvre’s Museé des Arts Decoratifs, to a fascinated public and press—but Gysin, unsatisfied with a small art audience, dreamed of mass production. Along with the cut-up method of text composition he had honed with Burroughs, Gysin considered the Dream Machine his magical message to the world.

EEG activity shows oscillations at various frequencies, and several of these oscillations have characteristic frequency ranges with spatial distributions that are associated with different states of brain functioning (e.g.  concentrated focus, waking, hypnosis, ASC and various sleep stages). Visions and fleeting inspirational ideas are the most desirable side-effects, from a passive receptive state of mind, similar to some forms of meditation.