Frequently Asked Questions
WHAT IS A LIGHT AND SOUND MACHINE?
Utilizing light and sound pulses at a specified frequency,
these machines stimulate the brain wave activity of the
user, leading the user's mind from normal waking
consciousness to a variety of altered states of
WHAT ARE THESE STATES AND HOW DO THEY DIFFER FROM
The specific frequency ranges and their associated mental
states are as follows:
BETA 13-30 Hz: Normal waking state; attention directed to
surroundings. Includes agitated, restless/"monkey mind"
states which are especially amenable to treatment with
light and sound stimulation.
ALPHA 8-13 Hz: Relaxed, tranquil, daydreaming, "inward
THETA 4-8 Hz: Borderline sleep; meditation state with
access to the
unconscious; creativity, learning, inspiration.
DELTA 1-4 Hz: Deep, dreamless sleep; trance state.
WHO CAN BENEFIT FROM THIS TECHNOLOGY?
Light and sound can enhance the work of physicians,
psychologists, therapists, body workers, any harried
professional, as well as the individual experimenter who
wishes to explore altered states of consciousness,
awareness expansion and sensory stimulation.
WHAT HAPPENS WHEN I HAVE A SESSION?
With special LiteFrames over your closed eyes and
headphones over your ears, you are immersed in colorful
geometric patterns and entrancing sounds. The light and
sound pulse rate shifts from state to state as the session
progresses; brain wave activity will follow the pulse rate
of the machine and fall into synch with the changes.
WHAT IS ACHIEVED BY BEING IN THESE STATES OF MIND?
The following are some of the areas being explored by
users of these machines: psychological stress relief, deep
relaxation, assistance in falling asleep, memory
improvement, increased learning, stabilizing emotions,
increased intellectual focus, lucid dreaming, greater
sound can substance abuse reduction, sensory stimulation,
increased physical energy. While some of these benefits
have been substantiated by research studies, these
machines are experimental and results will vary from
person to person.
HOW IMPORTANT IS THE SOUND?
The entrainment mechanism is both visual and aural. Sound
and music have been used for centuries in may cultures to
manipulate consciousness. Drums, chants, and environmental
sounds like wind and rain all provide strong mental
pictures and associations. Pleasant sounds are much more
enjoyable and relaxing than one-note beeps or tones, such
as those used by other machines. Synetic Systems
incorporates the most sophisticated sound generation
circuitry of any light/sound device, employing digital
synthesizers to generate complex wave forms, rich two-
-and three- note harmonies, and moving audio sculptures.
Use of special "audiostrobe" CD's can fully synchronize
the lights with the audio program.
WHAT ARE "BINAURAL BEATS"?
Binaural beat generation is a sound feature on most
Synetic Systems products. Using two sound synthesizers in
the audio circuit, and by specifying slightly different
sound frequencies for the left and right channels, it is
possible to induce a third frequency which is the
difference between the left and right in the mind of the
user. This is known as a binaural beat frequency
generation. The perceived beat frequency is especially
useful as an entrainment tool when paired with pulsing
WHY ARE LED'S USED INSTEAD OF INCANDESCENT LIGHTS?
Light emitting diodes--LED's--are state of the art solid
state devices that convert small amounts of electrical
energy into light. They can be switched on and off much
faster than incandescent lights, producing the crisp
strobe-like pulses which have been shown to be most
effective at inducing patterns of brainwave activity. They
also create very pure colors--again an important factor in
the alteration of consciousness and brainwave
WHAT IS WAVETABLE CROSSFADING?
Proteus includes four different, user-editable audio
waveforms. The waveform, pitch etc. can change from
segment to segment, and to avoid a startling "hop" from
one to the next, we smoothly mix them together at the
segment boundaries; this is called "crossfading".