The music of your own heart
Two small electrodes rest in your hands. The room softens. A lamp begins to breathe in colour. And then a note arrives — not from a speaker, but from you. Then another. What you are hearing is the rhythm of your own heart, translated, in this moment, into sound.
No one has heard this music before. It has never existed. It is the shape of the small, constant variations between one of your heartbeats and the next — the signature your autonomic nervous system is writing right now — rendered audible.
Nothing is being done to you
Most of us spend our days being told what to do with our bodies. Stand straighter. Breathe deeper. Sleep more. Try this. Take this. Become this.
For twenty or forty minutes, none of that is happening. The instrument simply listens, and gives back what it hears. There is no soundtrack chosen for you. No programme. No protocol you are failing or passing. Just your own rhythm, returned to you as something audible — which is to say, returned to you as something beautiful.
The body, given a clear and unhurried signal about its own state, finds its way.
What people experience
What people experience is unique to them. Some sink quickly into a deep stillness. Some feel emotions move through that they hadn’t known were there. Some fall asleep — which is often the body taking what it most needs. Some sit afterwards for a long time without speaking. Some hear a passage of their own music and recognise something about themselves they have never had words for.
A session lasts twenty to forty minutes. You can come alone, or share a session with another person — in which case the instrument also plays the conversation between two hearts, which is its own quiet revelation. Afterwards you can take home a recording of the music you made, and a report tracing your session across ten parameters of autonomic function — flexibility, resilience, balance, recharge, and others.
An invitation
I bring Sound of Soul to retreats, gatherings, and meetings — wellness, scientific, and cybernetic. If you are organising one, or if you would simply like to experience a session yourself, write to me.
soundofsoul@petertuddenham.com
I do not market this as a treatment for any condition. It is offered as a wellness and biofeedback experience, and as an invitation to encounter yourself.
How it works, for those who want to know
Sound of Soul is a bio-cybernetic instrument developed by Rasmus Gaupp-Berghausen of Aqua Quinta, and supported in the USA by The True Wellness Center.
It measures heart rate variability — the tiny fluctuations in the timing between one heartbeat and the next, which carry the signature of your autonomic nervous system. Those fluctuations occur in a frequency range too slow for the human ear to hear (0 to 0.4 Hz). Sound of Soul lifts them, octave by octave, into the audible range, and then, octave by octave again, into the visible range of light. What was happening silently inside you becomes sound, and then becomes colour.
In Rasmus’s own words:
The focus of my work today is to convert the constantly varying living vibrations of the heart — which dwell within every person and connect us all to one another — into the frequency spectrum of sound and colored light. With this, a possibility is created to make our uniqueness, and our connection to the other, experienceable, audible, and visible.
This is biofeedback in its oldest and most precise sense: the system measures, returns the measurement, and the body — finally able to hear itself — does the rest. The instrument is a mirror, not a treatment.
The lineage behind it runs through European bio-regulatory medicine — Pischinger and Heine on the connective ground that surrounds every cell, Randoll on cellular biorhythm — and connects to contemporary research: Carlo Ventura’s work at Bologna on heart-sound vibrations and cellular response, Roumiana Tsenkova’s aquaphotomics on the structuring of water by sound and light. The body is roughly seventy percent water. When water hears coherent rhythm, something in it organises.
You can hear a short example of music developed from a Sound of Soul recording here. The original session sounds more spare than this — closer to a chamber instrument speaking alone in a quiet room.
Part of a wider practice
Sound of Soul is one of several instruments I work with for sensing the state of the ground — the medium in which a person, a relationship, or an organisation actually lives. The same questions appear at every scale.
→ Ground Regulation: a diagnostic for the regulatory health of people and organisations, drawn from the same European bio-regulatory tradition.
→ CoExplorer: AI-guided expert knowledge capture and transfer, built on thirty years of conversation-based learning science.
Sound of Soul is offered as a wellness and biofeedback experience. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any condition.