The complete PAL light and sound system is the creation of David Siever and manufactured by Mind Alive, Inc. Your PAL mind machine is shipped FREE (free shipping to all U.S. destinations) and includes the ebook "Mind States: An Introduction to Light & Sound Technology", 2nd edition (sent in pdf format along with your order confirmation email).

The DAVID PAL (PAL meaning "Portable And Lightweight") is one of the finest brainwave synchronizers produced. This brain machine may be small in size, but it possesses 18 of the most entraining light and sound sessions available. It even has heart rate variability (HRV) to help you breathe just as well as an experienced meditator.

The DAVID PAL is an extremely portable audio-visual entrainment (AVE) device. This brain machine is one that will fit in your shirt or jacket pocket (approximate dimensions - 2.5 x 1 x 3.5 inches / 7 x 2.5 x 9cm ) and will allow you to experience audio and visual frequency stimulation wherever you go. The PAL light and sound system is perfect for people who are active and on the go as well as those looking for relief from working long hours in front of a computer. The PAL contains pulsed light and sound frequency sessions that target all the general brain wave states (Beta, Alpha, Theta and Delta) as well as specially designed sessions for depression reduction, personal hypnosis and assisting in generating lucid experiences.
 

AUDIO-VISUAL ENTRAINMENT (AVE):
To ensure safe, gentle and effective audio-visual entrainment (AVE), the DAVID PAL^TM offers the following:

• Tru-Vu Omniscreen^TM Eyesets - Our unique Tru-Vu Omniscreen^TM Eyesets were carefully designed to provide you with the most effective and safe light and sound experience. The Tru-Vu Omniscreen^TM Eyesets for the PAL use eight blue-tinted white LEDs mounted over a silver reflector behind a translucent screen. This disperses the light evenly.  Our new Tru-Vu Omniscreen^TM Eyesets are specially designed to allow for the left and right visual fields of each eye to be individually stimulated rather than the entire eye. With the Tru-Vu Omniscreen^TM Eyesets, the lights flash into the left visual fields of both eyes, then alternately flashes into the right visual fields of both eyes. This approach allows the ability to stimulate either visual cortex with a frequency different from the other visual cortex. For example, a person who functions strongly from the left brain could have 8 Hz stimulated into the right visual field (and therefore the left brain) to slow down left brain function and have 18 Hz stimulated into the left visual field to increase right brain function.
• Isochronic Pulsed Tones, Binaural Beats and Chime - The tones of the DAVID PAL^TM are evenly spaced, are of equal pitch and are turned on and off at a specified rate. This is important to enhance the effectiveness of audio entrainment.
• Soft-Off^TM - The gradual lowering of the lights and tones at the end of the session prevents a startle response (also known as somnatic shock). Soft-Off^TM ensures that relaxation and other benefits carry over even after a session has ended.
• Battery Power Indicator - At a quick glance you can tell if your battery has enough power to run your session.  New eyeset technology allows for much longer life for your 9-volt battery.
• Easy-To-Find Intensity and Volume Buttons - The intensity and volume buttons are raised so that you can make the necessary adjustments easily and quickly, even with your eyes closed. Adjust the intensity of the Omniscreen^TM  Eyeset with the easy-to-find INT button. 
• 18 Preset Sessions - Including Brain Brightener (for ADD and cognition), Fractioned Hypnosis, Alpha/Beta Mix (for depression), Schumann with Dissociation & HRV (for meditation), Beta Perker, Theta with Dissociation (for sleeping), and Sound Sync (to turn your music into an intriguing light show).

(See list of built-in sessions below)

EACH DAVID PAL COMES COMPLETE WITH:

• Tru-Vu Omniscreen^TM Eyesets
• Quality Stereo Headphones
• Stereo Patch Cord
• DAVID Carry Bag
• 9-Volt Alkaline Battery
• Comprehensive Operator's Manual (click to preview in pdf format)
• DAVID User's Guide (click to preview in pdf format)

HEART RATE VARIABILITY (HRV):
For the first time ever, a system exists where meditative breathing may be paced along with an audio-visual entrainment (AVE) session. This technique has been borrowed from our clinical model, the DAVID Paradise XL^TM. Long, graceful breathing cycles have been used as part of meditation. Scientifically, this technique has been analyzed and shown to settle down a stressed autonomic nervous system. Both sympathetic (flight-or-fight) activity and para-sympathetic (the brain’s efforts to compensate) activity settle down dramatically using HRV techniques.

The heart speeds up with every breath in and slows down with every breath out. This swing in heart rate is HRV. A typical heart beat swing is in the order of about 15 beats per minute (bpm). When people get stressed, the heart typically clamps to sometimes as low as five bpm HRV at times intermixed with sharp spikes in heart rate. This is all abnormal activity and is rough on the heart.

The HRV technique used clinically is based on a 10 second breathing cycle (six breaths/minute, by inhaling slowly for five seconds and exhaling slowly for five seconds in an easy, relaxed breath). When using HRV paced breathing, listen to the heartbeat generated by the DAVID PAL^TM through the headphones. Inhale for two heartbeats and exhale for two heartbeats (not your own heartbeats!). Most sessions begin at seven breathing cycles/minute (28 heartbeats/min) and slow to six breaths /minute (24 heartbeats/min). This allows the user to breathe a little faster at the onset of a session until he/she has had time to relax.

Preset Sessions DAVID PAL with serial number beginning "02"

These preset sessions are the latest designs and were designed based upon research. They are provided in three sections. Section "A" are our stimulating sessions, section "B" are our meditation & relaxation sessions and section "C" are our sleep and special sessions. Here is a detailed list of the preset sessions:

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