STROBONAUT

Experience visionary states with ganzflicker
a luminous launchpad into liminal dreaming

To sit, with eyes closed, in front of a stroboscopic lamp is a very curious and fascinating experience.

Aldous Huxley. The Doors of Perception: And Heaven and Hell

Not believing at that time, as I do today, that the potential for a mystical experience is the natural birthright of all human beings, I attributed everything that happened to the combined effect of LSD and the stroboscopic light.

Stanislav Grof, The Way of the Psychonaut, Volume I: Encyclopedia for Inner Journeys

Strobonaut is a stroboscopic ganzfeld (ganzflicker) app for Android phones. When used in a smartphone Virtual Reality headset for meditation and music-listening reverie it has psychedelic effects promoting mental health and creativity by giving access to altered states of consciousness and vivid dream-like visual imagery released from the deep brain / unconscious.

The uniform unstructured visual field of a ganzfeld increases the alpha rhythms of the brain, oscillations in the 8-12 Hz frequency range which are associated with visual imagery and creativity. Strobonaut combines ganzfeld with flickering light stimulation sweeping through the 8-12 Hz frequency range, boosting alpha further by neural entrainment. The combination of the two as ganzflicker is therefore exceptionally effective for promoting the psychedelic release of visual imagery ^{1, 2}.

Strobonaut can be switched from ganzflicker into Eye Movement mode for implementing EMDR therapy and self-therapy. The app proved effective during Covid lockdown for delivering remote EMDR and home use of self-help EMDR.

The Flicker Drive page of this website gives suggestions on how to use the Strobonaut app for ganzflicker meditation and visioning, including a useful launch sequence:

The Flickerspace page describes the hallucinatory progression from elementary to complex levels of visioning using the metaphor of space travel:

Region 0: The Launchpad — Blank Screen
Region I: Ignition — Central Focus / Mandala
Region II: Atmospheric Exit — Patterns / Tunnel
Region III: Orbit — Luminous Mist / Shadowy Shapes
Regions IV and V: Interplanetary Space — Scenes, Settings, and Filmstrips
Region VI: Interstellar Space — the Numinosum
Region VII: The Destination Star — Mystic Bright Light

For further information on the neuroscience see the Current Research section at the foot of this page.

1. MacKisak, M., & Reeder, R.R., 2022. Manipulating light can induce psychedelic experiences – and scientists aren’t quite sure why. The Conversation, https://doi.org/10.64628/AB.kmyxfk7qn
2. Königsmark, V.T., Bergmann, J. & Reeder, R.R., 2021. The Ganzflicker experience: High probability of seeing vivid and complex pseudo-hallucinations with imagery but not aphantasia. Cortex, 141, pp.522-534. https://doi.org/10.1016/j.cortex.2021.05.007

Please read the Safety Information before downloading the app:

As a safety feature, to prevent unauthorised access by children and others who might be at risk, on most smartphones the app only opens when the phone is held precisely horizontal in relation to the gravitational field of the planet or space station you are on.

Click the icon below for the free download of Strobonaut for Android — no sign-up, no registration, no data collected — just download and fly

If you use an iPhone consider purchasing a refurbished Android to use as a dedicated Strobonaut propulsion unit. It means that then you do not get interrupted by calls, notifications etc. during a flicker run. Your main phone can be used for the session audio. Recommended models of Android are given below.

Installing the Strobonaut App on Android

The Strobonaut app is a direct download (APK file) for Android devices. It comes directly from the developer (Pete Carr, a psychiatrist with EMDR expertise) and is safe to install. Follow these steps to install:

Step 1: Enable Installation from Unknown Sources

Before you can install the app, you’ll need to adjust your phone’s security settings:

• Android 8.0 and newer: When you try to install the APK, Android will prompt you to allow installation from your browser or file manager. Tap “Settings” and enable “Allow from this source”
• Older Android versions: Go to Settings > Security, and enable “Unknown sources” or “Install unknown apps”

Step 2: Download the APK

• Tap the download link on this website using your Android phone’s browser
• The APK file will download to your device (usually to your Downloads folder)

Step 3: Install the App

• Once downloaded, tap the notification or open your Downloads folder
• Tap the Strobonaut APK file
• Follow the installation prompts
• Tap “Install” when prompted

Step 4: Launch Strobonaut

• Once installed, you can find the Strobonaut app in your app drawer

Smartphone VR Headsets for Ganzflicker

Basic smartphone VR headsets are inexpensive and widely available:

• These are simple holders with lenses that turn your phone into a VR display — not expensive standalone VR gaming systems
• They are lightweight, easy to use, and can be found online and in stores worldwide
• Any smartphone VR headset that fits your phone can be used for ganzflicker meditation with the Strobonaut app

For EMDR eye movement features:

• The Destek V5 headset (recommended) includes a touch button that allows you to switch between ganzflicker mode and eye movement mode during your session
• The Destek V5 is currently available on ebay for £15-£20

Using a dedicated Android phone (optional but recommended):

If you use an iPhone, or want to enhance your sessions, consider using a dedicated Android phone for the Strobonaut app. Refurbished Android phones are available online at modest prices depending on model and condition.

For best results, choose a refurbished Android phone with a 6.2–6.7 inch display, slim bezels and overall size under about 163 × 83 mm (the Destek V5 limit). Examples that work well include the Nokia 3.4, Samsung Galaxy A51, Motorola Moto G8 Power and Xiaomi Redmi Note 9. These are often available refurbished in the £50–£80 range, depending on condition.

Benefits of using two phones:

• Keep your main phone available for audio (music, guided meditation, hypnosis, etc.)
• Use the dedicated secondary phone in the VR headset for uninterrupted ganzflicker sessions
• Avoid notifications or calls disrupting your meditation

CURRENT RESEARCH

In order to understand the working brain as a network, it is essential to identify the mechanisms by which information is gated between regions. We here propose that information is gated by inhibiting task-irrelevant regions, thus routing information to task-relevant regions. The functional inhibition is reflected in oscillatory activity in the alpha band (8–13 Hz).

Jensen & Mazaheri, 2010, Shaping functional architecture by oscillatory alpha activity: gating by inhibition

Adrian and Matthews (1934) reported that when subjects open their eyes in a uniform visual field (illuminated or completely dark) a short time after the usual α-blocking effect synchronisation reappears. Lehtonen and Lehtinen (1972) examined the effects of a uniform visual field on α rhythm. The authors found that eyes open in a uniform visual field (sheet of paper placed in front of eyes) or ganzfeld (translucent hemisphere) led, after an initial delay, to reappearance of α activity that is comparable to the eyes closed level.

Putz Braeunig & Wackermann, 2006, EEG correlates of multimodal ganzfeld induced hallucinatory imagery

The Fingelkurts meditation studies¹ show that the hallmark neurophysiological trait of deep long-term meditative development is increased frontal alpha synchrony — the frontal Observer coming into fuller prominence, with relative fading of posterior Narrator and Embodier. Independently, Lindahl et al. 2014² found that meditation-induced luminous experiences — ranging from discrete phosphenic points to diffuse brightening of the entire visual field — arose consistently in the context of heightened concentration and were neurophysiologically preceded by increases in global alpha power, implicating alpha-mediated functional inhibition and sensory suppression as the gateway to such light phenomena.

In a self-experimentation study I found that closing the eyes for a few minutes during ganzflicker meditation, then reopening them, reliably produces a striking increase in the apparent brightness of the visual experience about 20–40 seconds later³. This timing aligns with the known rebound dynamics of the brain’s alpha rhythm⁴. Three influences act together here to raise alpha — the ganzfeld, the flicker, and the rebound of alpha that follows a period of eye closure. Yet alpha is an inhibitory rhythm: more of it should make the visual world fade, not blaze. Alpha’s gating function is known to suppress the primary visual pathway⁵, so rebound should lead to a fading rather than brightening of the visual experience.

The research literature suggests an elegant resolution of this paradox. While alpha rebound quietens the brain’s normal cortical visual system, the flickering light continues to activate a much older visual pathway centred on the superior colliculus of the deep brain. Research has shown that this evolutionarily ancient pathway is highly responsive to flickering light and can continue processing visual signals independently of the primary visual cortex⁶.

It is therefore hypothesised that the extraordinary luminous “white light” experience arises because the brain’s usual visual processing is temporarily turned down whilst simultaneously this older pathway is being strongly driven. Rather than alpha-mediated visual fading, “fade-out” or “mist” being a well recognised phenomenon of ganzfeld alone, ganzfeld combined with flicker triggers the bright light experience that has been described for centuries in meditation, mystical experience, psychedelic states and near-death experiences. Ganzfeld induces the mist; and flicker induces the brightening of that mist.

The bright light experience is one form of mystical peak experience, traditionally occurring relatively rarely in religious contexts but now a frequently reported phenomenon of psychedelic drug and near-death experiences. There is currently a renaissance of interest in the use of psychedelic drugs to boost the effectiveness of psychotherapy. A widely accepted principle of this psychedelic-assisted therapy, one supported by many empirical studies, is that the quality of peak mystical-like experiences occurring during the therapy sessions contributes significantly to a positive long-term outcome. When occurring spontaneously during drug-free depth psychotherapy, the bright light experience has similarly been found to be highly therapeutic⁷ with lasting beneficial effects. The peak experiences of bright light induced by ganzflicker visual stimulation, initially if needed in combination with a mini-dose of a psychedelic drug, may have a significant role to play in the psychiatry and neuroscientific illuminism of the future.

For further information:

strobonautinfo@gmail.com

Dr Pete Carr
July 2026

1. Fingelkurts, A. A., Fingelkurts, A. A., & Kallio-Tamminen, T., 2016. Trait lasting alteration of the brain default mode network in experienced meditators and the experiential selfhood. Self and Identity, 15(4), 381-393. https://doi.org/10.1080/15298868.2015.1136351
2. Lindahl, J.R., Kaplan, C.T., Winget, E.M. & Britton, W.B., 2014. A phenomenology of meditation-induced light experiences: traditional Buddhist and neurobiological perspectives. Frontiers in psychology, 4, p.66787. https://doi.org/10.3389/fpsyg.2013.00973
3. Carr, P. 2025. On the Brightening of Subjective Luminosity in Ganzflicker Meditation: A Dual Pathway Hypothesis.
4. Lehtonen, J.B. and Lehtinen, I., 1972. Alpha rhythm and uniform visual field in man. Electroencephalography and clinical neurophysiology, 32(2), pp.139-147. https://doi.org/10.1016/0013-4694(72)90136-8
5. Toscani, M., Marzi, T., Righi, S., Viggiano, M. P., & Baldassi, S. 2010. Alpha waves: a neural signature of visual suppression. Experimental brain research, 207(3), 213-219. https://doi.org/10.1007/s00221-010-2444-7
6. Chen, C.Y. & Hafed, Z.M., 2018. Orientation and contrast tuning properties and temporal flicker fusion characteristics of primate superior colliculus neurons. Frontiers in Neural Circuits, 12, 58. https://doi.org/10.3389/fncir.2018.00058
7. Luthe, W., 1973. Unusual brightness and related phenomena. In: Autogenic Therapy, Volume VI: Treatment with Autogenic Neutralization. Grune & Stratton, New York, pp. 118–129. (Typographic re-setting; original pagination retained.)