Archive for Discontinued Products

An “E – Interview” with Chuck Davis, Creator of the ROSHI EEG/Neurofeedback System

An “E – Interview” with Chuck Davis,
Creator of the ROSHI EEG/Neurofeedback System

Editors Note: Within the AVS / light and sound community, Chuck Davis is known for his knowledge and experience in developing brainwave measurement and entrainment systems. I was fortunate to meet Mr. Davis during a Winterbrain conference a few years back and try his ROSHI EEG/Neurofeedback system. Having used other EEG/NFB systems before, I tried the ROSHI, and taking into account the large number of interested people in the room, found achieving the targeted alpha frequency difficult to attain at first, but after a few minutes felt capable of maintaining that frequency easier than on all the other systems. The ROSHI is definitely “user friendly”.

Chuck has developed one of the finest EEG / NFB systems available in the ROSHI and has recently, in conjunction with Ray Wolfe, created an EEG / AVS interface that will certainly en- hance any neurofeedback training session. Before reading Chuck’s replies to those questions, let’s begin with a little background and contact information:

“After having spent a couple of “lifetimes” in aerospace and the music business, looking for an alpha training instrument, I met Hershel Toomim, of BioComp, in 1979. He was develop- ing BioComp system, on an Apple.

We got into some interesting ideas. After hours of rapping, he hired me. Thence came his BioComp 2001. I designed the infrared communications part. Most anytime, one can find me at 1.323.292.2550.”

Q: How did you initially get involved in eeg/neurofeedback? Did you start out in light/sound or biofeedback? When was that?

A:” During the late ’70s, while in the music business, I started hangin’ out with the `consciousness’ crowd, est, Esalen and the Perls gang, Reichian folk and knew the Late Robt Monroe. Experienced and studied his stuff. Hung out w/ Glenn and Lee Perry and their Samadhi Tank, before they went big time. My first “snap” into pure space, no time, was in the tank. While working for Hershel, my intuitions started to make sense to me. One day, at Hershel’s, this guy came in with a Synchro Energizer. The light bulb flashed on. What better way to set the flicker rates than the brain, itself? This new technique is not concerned with sin- gle frequencies, per se, but /any/ total number of stationary frequencies. Well, almost. Ten years ago, while scanning thru patents, to be sure that I wasn’t going to be stepping on any toes.”

Q: What does ROSHI stand for?

A: “In zendos, there’s a robed fellow that walks around with a little stick. If, during your “sesshin”, you should start dozing off to la la land, you get to experience a whack from that stick. He’s called the Roshi; same as the Maharishi. A teacher/trainer/guru who’s been there, done that. I’ve told a couple people that one of the reasons that called the system, ROSHI,

is that I didn’t have the balls to call it “Maharishi”. I went to school on those folks, with my de- sign rules following the TM® model. The power of the mantra to organize the brain/mind/spirit interface.”

Q: What gave you the motivation for creating the ROSHI?

A: “What is meditation, really? While in Japan, in the ’60s, I asked why those monks sit like that all day. “It toughens you up.” Huh? Needless to say, that stuck with me, for twenty years. I couldn’t afford the other stuff, not even Hershel’s, so I designed my own. In late ’85, I bought an Amiga A1000. It was a perfect opportunity to teach myself effi- cient real-time programming, while putting all of my neurofeedback design rules into one program. It was a truly personal project that went commercial.”

Q: What aspects of your system (ROSHI) are unique, ie, what other NFB systems lack?

A: “First, there’s response time. When I first started writing the code, in 1988, `Visceral’ or *pre- conscious* control of a screen display was on my mind. I figured that the feedback had to be fast enough that the brain operator couldn’t trick it. I’ve received a few barbs about ROSHI’s response time not being that relevant. How would `they’ know, since `they’ don’t know how to do it?”

Q: Could you please explain, in simple terms so us neophytes can understand, what the ROSHI does and how an individual can learn how to operate it?

A: “When a person is deeply, deeply relaxed, into just “blackness”; from there, you use your tal- ent to coach the client to do the ROSHI General Practitioner Protocol [RGPP], or whatever mo- dality you choose to use. From this “space”, with the subject’s critical-logical mind is “quieted”, the client is learning to (Witness the training, rather than `trying to do’ the training. Learning to focus one’s attention, with the least amount of effort; the zone. From this “space”, the immune system, too, can do its “housekeeping”, as it is not being /disturbed/ by the noisy incoherent “conscious mind”. The Complex (adaptive), C (a), EEG coupled L&S protocol, appears to in- duce the brain towards focused attention, it appears to accelerate the boost of the brain’s me- tabolism, blood flow, enough that the subject is able to maintain awareness, during training, without falling to sleep; whereas the average person would have long wandered into zzz land. With this ability to induce the brain to “normalize” itself, through time, the brain begins to pro- duce the neurochemistry necessary maintain this “new” operating region. You can call it a “neuro-mantra”. This EEG driven/coupled protocol is a time domain kinda system. It uses par- tial wavelet/chaos stuff, as it adapts to whatever the raw EEG is doing, even up at subcortical brainstem speeds. With this wideband C(a) protocol, the brain becomes an active phase error detector. With the brain inside of this “closed loop”, phase corrections begin to take place. This takes energy, bloodflow. Wake up, wake up! Now, when the subject has approached this state of “samadhi”, quietude, the trainer can begin coaching to whatever NFB protocol is cho- sen. On the other hand, one can boost the performance of their tapes, CDs or whatever. This combination, along with your current TOVA, MMPI, Beck or whatever, makes for a most pow- erful training system that you’ll have, IMHO, of course ;)”

Q: I understand that you and Ray Wolfe have developed an interface for the ROSHI that allows for the synergistic integration of l/s stimulation. Can you tell us about it?

A: “Yes, indeed! About a year ago, my source for EEG amplifier boards “lost” the ability to deliver anymore of these boards to me.  The structure of the ROSHI(AVS) software is segmented into three parts. None of these three protocols “knows” that the other exists. It is left up to the trainer/clinician/Roshini to integrate them into any protocol they should decide to mock up, for their client’s situation. By moving just the C(a) subroutines onboard the EEG unit, this new EEG front-end gets to be operated as a stand-alone EEG coupled L&S system that can operate on top of, or with *any* BFB/NFB setup. As the serial port communications will be “open platform”, this will allow other “neuro- hackers” to do their programming thing. The ROSHI(AVS) software is a different kind of thing, I think. When coupled to the stand- alone ROSHI2 front-end, it becomes a full blown interhemispheric NFB training system. Briefly, regardless of training modality, it is always pushing the brain operator to be in synch. It brightens things up.”

Q: How often do you personally use the ROSHI? What are your personal goals for doing so? Do you incorporate other modalities while training (light/sound, tactile stimulation, etc.)?

A: “Myself, I do C(a), with EMDR. The ultimate goal of ROSHI is to vanish. I’m not a clini- cian or a trainer. Yes, ROSHI will drive magnetics and CES.”

Q: What’s your definition of the perfect eeg/neurofeedback instrument? If light/sound are part of it, what color LEDs would you use? What type sound stimulation?

A: “Heck, the ROSHI(AVS) NFB system, of course. I leave the choice of LED colors to the cli- nician. I use a simple beep, at training threshold. When I tell people to /make/ the tone beep, they can’t. But, when I instruct them to find a mind “space” where they can *allow* the feedback tone to happen, a little grin comes over their face and, for them, the concept of time begins to vanish; first order meditation. Two different sets of Tru-White® HemiStim type of LED frames are shipped with the system.”

Q: What considerations should someone new to NFB take into account when shopping for NFB equipment?

A: “This is a general response from an exhibit I attended, at Winter Brain, in Miami: “Roshi (tm?) and the Roshi Roshi (Chuck Davis) were present and, as usual, inundated with requests for demo’s. The new model of the Roshi, which runs independently of a computer, is going to be a really neat device. Can’t wait to get one. My Roshi(AVS) session really woke me up, in mid-afternoon, when presentations were putting me to sleep, and left me lucid well into the wee hours.” This recent report was from a Ph.D. clinician who had heard of the ROSHI(AVS), since ’95. From another clinician: “Oh yeah!! That’s what I love about ROSHI. If one is ready to go transpersonal, the ROSHI is ready to take you there.”. As usual, a person should look for price/performance.”

Q: Of all the research studies you have been involved with, is there one in particular that has left a lasting impression on you?

A: “The Tibetan Book of the Great Liberation”, Evans-Wentz “Neurofeedback Treatment of Depression with the ROSHI” has been published, by D. Corydon Hammond, Ph.D., Vol 4(2), in the _Journal of Neurotherapy._ Being able to take a person from the deepest near suicidal depression, to peak performance, without drugs, and to outperform other protocols, is quite a reward for me.”

Q: What do you believe are the most important issues facing NFB today?

A: “Getting more public and HMO acceptance. Zero Prozac, zero Ritalin, please!”

Q: What do you see the future of NFB being?

A: “Strong. NFB is just beginning to look at expansion into more areas, the chiropractic, physical therapy, golf…”

2 Examples of InnerQuest Lightframes

Back in the late 1980’s and early 1990’s IQ International, also known as InnerQuest, manufactured some excellent light and sound mind machines. Of course the available technology was primitive compared with today, plus at the time red LEDs for light frames was the first and only choice for the light stimulation. Of course all that changed, but here are two pictures of IQ International light frames that were common…

Notice the two LED positioning of the light frame on top and the ‘light intensity wheel’ for adjusting the brightness for the light frames on the bottom. The top light frame was used with the IQ 9110 and the light frame with the light intensity wheel was used with the IQ Jr light and sound brainwave frequency mind machine.


Which Esprit brainwave entrainment unit do you have?


Which Esprit brainwave entrainment unit do you have?

Several days ago I posted information about the Mastermind Esprit system by Synetic Systems (now known as Mindplace). This brainwave entrainment unit contained six sessions by Dr. Rayma Ditson-Sommer and was extremely popular.

Not long after that post went up I received an email from Deborah A. including pictures that showed her Esprit unit. It was different! Her Esprit did not have Mastermind Esprit shown on her unit, it had Synetic Esprit showing and her unit contained 12 sessions, not six.


At my age forgetfulness is a reality (think CRS) no matter how many memory enhancement sessions I experience. And after 25 years in the light and sound industry there are plenty of things that have happened that I’ve totally forgotten about. That’s why I have kept boxes piled with notebooks full of old news releases, brochures, product information and users guides and manuals. Not to mention old mind machines.












Deborah had asked if I had the 12 session Esprit manual because the post I made showed the Esprit 6 session owners manual. After delving through all the boxes stored from the 1990’s through the early 2000’s I came up empty. There was nothing written about the Synetic Esprit with 12 sessions, just information regarding the Mastermind Esprit with six sessions.

So dear readers, have a look at the pictures of Deborah’s 12 session Synetic Esprit and should you have any information about that unit – especially the session list – could you please email it my way in care of

Both Deborah and I would be most grateful… Thanks!


Copyright: Michael Landgraf (CA) 2016. All rights reserved.



Mastermind Esprit Manual by Synetic Systems

Mastermind Esprit Manual by Synetic Systems

The Mastermind Esprit was manufactured by Synetic Systems (now known as Mindplace) in the early 1990’s. It was an awesome portable light and sound mind machine with six sessions created by the late Rayma Ditson-Sommer, Ph.D. This system was one of the most popular mindmachines sold and one of our all-time favorites.










esprit manual 1

esprit manual 2

esprit manual 3

esprit manual 4



This post copyright: (CA) 2016. All rights reserved.

Synetic Systems Synergizer

Synetic Systems Synergizer

Last century Synetic Systems, now known as Mindplace, manufactured the Synergizer light and sound mind machine (also known as brain machine, dream machine and psychowalkman) software for personal computers.


The features of the Synergizer included: session lengths of up to 10 hours; segments having their own unique stereo sound effects; individual ramps varying from 1 – 99 minutes; independent pulse rate control for both left and right eyes and ears; three independently controlled oscillators per ear for allowing the programming of complex binaural beat frequencies and 360 degree control of synchronizing or alternating light and sound brainwave frequency patterns.

synergizer brochure inside

The Synetic Systems Synergizer was an awesome idea and was the forerunner of many of today’s computer software programs for creating entrainment via brainwave frequency stimulation like the Portacle, Neuroprogrammer 3 and Mind Workstation.

Copyright: (2016) CA. All rights reserved.


AllColor Visual System

AllColor Visual System

The AllColor Visual System was created by Michael Landgraf of and the late Chris Williams of Rybett Controls. The ACVS was the first color spectrum unit designed for use with light and sound brainwave entrainment devices, also known as mind machines, brain machines and psychowalkman.



The AllColor Visual System featured left and right independent eye control for color choice, four sliders for each eye that controlled red, green and blue color generation plus brightness control. The ACVS could be used either as a stand alone system for color therapy or connected to a light and sound mind machine for choosing any color in our visual color spectrum – literally thousands of different shades, blends and brightness of color choices. And the system was built utilizing analog rather than digital controls as analog allows the user to gently ramp through color changes whereas digital utilization results in jumps in color changes, which was adverse to fluid and continuous brainwave entrainment.


The reason Michael Landgraf and Chris Williams designed the AllColor Visual System was quite simple. At the time (circa 1995) if a light and sound mind machine owner wanted to use a different color stimulation for their mind machine session, they would have to buy a different color light frame. This was unacceptable. Mind machine owners would have to pay anywhere from $30 to $125 for each new color light frame, plus have so many different light frames that storage was a hassle. But mind machine manufacturers did not want to make multi-color light frames because selling individual color light frames was a cash-cow for them. So Michael and Chris made them and charged less than $200 for the entire AllColor Visual System. The result? Within six months light and sound manufacturers started producing multi-colored light frames.

acvs pic

All Mr. Landgraf and Mr. Williams wanted was for our clients to enjoy the sensation of different colors while experiencing their mind machine sessions at a cost-effective price. Once the manufacturers stopped being greedy and started producing a variety of colors within each light frame we felt we satisfied our goal and ceased making the ACVS and went back to what we enjoyed most: promoting the benefits and cost-effectiveness of light and sound mind machine neurotechnology.

Copyright: (2016) CA. All rights reserved.


Lucidity Institute DreamLight

Lucidity Institute DreamLight

The Lucidity Institute, founded by Stephen LaBerge, Ph.D., created the DreamLight in order for us to increase our ability to dream while asleep yet have complete awareness.


Being aware that you are dreaming often occurs in the middle of a dream. We’ve all experienced this at least once, but with the DreamLink you can keep dreaming for up to an hour longer. This knowing that you are sleeping, and dreaming while you are sleeping, is called lucid dreaming.

Dreamlight back

Today there are mind machines, also known as dream machines, brain machines and psychowalkman, that contain delta brainwave frequency sessions for entrainment of your mind to help you fall asleep and remain asleep. This is great for all us who have a hard time going to sleep because of brain chatter, anxiety or too much environmental noise.

Copyright: (2016) CA. All rights reserved.


InnerQuest Technology

InnerQuest Technology

InnerQuest Technology was originally known as Psych Research. Founded by the late Rob Robinson, InnerQuest produced the finest light and sound mind machines (also known as brain machines and psychowalkman) available during the 1980’s and 1990’s.

IQ brochure front

All of the InnerQuest mind machines produced pulsed light and sound to effectively entrain the brain with brainwave frequency sessions in the beta, alpha, theta and delta states of consciousness. For an example of just how beneficial InnerQuest technology was please read the letter Darby Hewitt wrote to Rob Robinson back in 1992.

IQ brochure inside

With the help of leading researchers including Dr. Rayma Ditson-Sommer and Gayland Hearst, Ph.D., InnerQuest set the stage for the acceptance and evolution of light and sound mind machines with many of today’s systems still including brainwave entrainment features first introduced by InnerQuest.

Copyright: (2016) CA. All rights reserved.


BioLight by Theta Technologies

BioLight by Theta Technologies


The BioLight by Theta Technologies was the first light and sound brainwave frequency mind machine to combine light and sound entrainment sessions with GSR (Galvanic Skin Resistence) biofeedback (much like today’s Thoughtstream by Mindplace) into one simple device. It was a great idea at an affordable price.


The best part of the BioLight multi-purpose mind machine was the five integrated light and sound sessions. The relaxation, meditation, energize and accelerated learning sessions were all created by Rayma Ditson-Sommer, Ph.D.. Dr. Sommer was a pioneer in light and sound neurotechnology and considered the leader in promoting the beneficial effects of pulsed light and sound brainwave stimulation. Besides being the best at helping learning disabled and hyperactive individuals achieve peak academic performance at will, Rayma was at her best with pre-Olympians, Olympians and professional athletes. Gary Hall Jr. was her first pre-Olympian to complete her sports performance instruction for the Atlanta Olympic Games and brought home the gold medal. Up untril her passing after the London Olympic Games, Rayma’s students brought home over 50 Gold, Silver and Bronze medals for the United States. The light and sound sessions used for the athletes peak performance training were based on the sessions associated with the BioLight.

With Dr. Sommer’s brainwave frequency entrainment sessions, eight unique user modes, and full biofeedback sensitivity control, combined with the lightframes, headphones and biofeedback finger probes, Theta Technologies offered a truly beneficial biofeed-in / biofeedback system well worth the $249 retail price.


Copyright: (2016) CA. All rights reserved.


Mind Gear Turbosonix CDs

Mind Gear Turbosonix CDs


First there was the Synetic Systems (now known as Mindplace, the manufacturer of Proteus, Procyon and Kasina mind machines) Polysync cassettes, then came the Mind Gear Turbosonix CDs and finally Audiostrobe CDs came into existence. The Turbosonix CDs just couldn’t compete with Audiostrobe.



Mind Gear produced a 3 CD set containing ten different Turbosonix sessions. Each session was perfectly synchronized with strobe light encoded sessions so you could enjoy light and sound mind machine brainwave frequency encoded entrainment simply by using your CD (compact disk) player. That was quite a feat for the technology of that time, which was only fifteen to twenty years ago. I know, that’s a lifetime for millennials, but a blink of an eye for us older light and sound brainwave frequency mind machine users.

So today, Mind Gear (also known as Mind Tools) makes the only bluetooth light and sound brainwave generator to be licensed by Apple. It’s called the MindLightz, comes as an iTunes app that is free to download. And all you need purchase are the bluetooth light frames and headphones. And as for synchronization, all you need do is use your Apple device’s playlist. The MindLightz is extraordinary, with plenty of manually controlled functions, pre-sets, and the entrainment effects are excellent.

Copyright: (2016) CA. All rights reserved.