There are conversations we have been having for so long that we no longer remember how they began.
Sound is one of them. To be precise, not sound in general, but a very specific thing: a pure frequency offered to the body. What is now called sound healing, vibrational work, tuning-fork work. It sounds modern. In truth, this knowledge is older than medicine in its current form. Older than the word "therapy" itself.
In our practice, music and a tuning fork at 432 Hz are present at every session. They are two of the five points of entry into the method. They are already described elsewhere on this site. But behind each of those two points stands a vast history that did not begin yesterday. And there are two other frequencies we want to speak about today — 528 Hz and 963 Hz. What they mean, where they come from, and what they do to the body.
This is not an article about the method. It is an article about sound. And about how long humanity has been working with it.
This conversation is almost three thousand years old
The word "therapy" comes from the Greek therapeia. It means to serve, to care for, to help. In ancient Greece, when a person fell ill, they might be brought to a temple of Asclepius. Inside the temple they were not given pills. Inside the temple there was singing and music. This was not entertainment for the convalescent. This was part of the treatment.
The idea that a particular sound, in a particular way, affects the body and the soul appeared long before any instrument capable of measuring frequency in hertz. The Greeks heard it with their ears and felt it in their bodies. That was enough for them.
Pythagoras, who lived in the sixth century BCE, is considered the first person in the Western tradition to use music as medicine. In his school, each day opened and closed with singing. He prescribed, as sources note, "particular harmonies for particular illnesses". Which exactly, we will never know. But we do know the instrument he worked with. It was the monochord — a single string stretched between two fixed points. A simple thing. And yet on this string Pythagoras discovered that when it is divided in simple proportions (in half, in thirds, in fourths), the resulting intervals are those the ear recognises as harmonious. The octave, the fifth, the fourth. This discovery became the foundation of all Western music.
But Pythagoras went further. He began to think of the universe itself as a great monochord. He imagined that the celestial bodies move in the same proportions as a vibrating string, and that this movement also produces sound — a sound the human ear is simply unable to hear. This is the famous "music of the spheres". It is easy today to smile at this idea. But notice: Pythagoras did not separate physics from medicine. For him the vibration of a string, the movement of planets, and the state of the body were one and the same subject. The same law, only at different scales.
When we say that a 432 Hz tuning fork tunes the body the way one tunes an instrument, we are not using a metaphor. We are using terminology that is two and a half thousand years old.
Plato, student of Socrates and teacher of Aristotle, developed this idea. For him music is not merely useful for the body. It forms the soul. In the Republic and the Laws he writes that some melodies make a person softer and more collected, others loosen and relax, still others excite and disturb. The Greeks had a word for this: ethos, the moral character of a melody. Plato held that the human soul is itself structurally "musical", and that music acts upon it not through the mind but directly, bypassing reason. That is, before you have had time to think.
Here, perhaps, is the point where ancient intuitions meet what we see in our own studio. A person picks up the tuning fork. Nothing has happened yet. No words. No touch. But already something has let go. The breath has deepened. The shoulders have dropped a centimetre. This is what Plato was speaking of. Sound acts before thought.
Aristotle, in the Politics, divided melodies into three kinds: ethical (those that shape character), active (those that move us to action), and passionate or inspiring. Each kind had its corresponding musical mode. And each mode had its purpose. Aristotle wrote that music is capable not only of stirring but also of cleansing, of releasing what has accumulated. The Greek word for this process is catharsis. Today we would translate it as release, letting go, the discharge of what has been held.
In the Christian tradition the conversation continued inside monasteries. Guido d'Arezzo, a Benedictine monk of the eleventh century, devised the system of note names we still use today: do, re, mi, fa, sol, la. He took the syllables from a Latin hymn to John the Baptist, Ut queant laxis. Each line of the hymn began on a note higher than the one before. Ut, Re, Mi, Fa, Sol, La. From this grew all of Western musical notation. From a single hymn sung by monks in the eighth century. And from this same set of syllables came the word "solfeggio", which we will return to shortly.
In the Islamic world, at the height of its medical golden age, medicine walked hand in hand with music. Avicenna (Ibn Sina), who lived in Bukhara around the year 1000, described music in his Canon of Medicine and his Book of Healing as one of the most effective forms of treatment. He understood it not as entertainment, not as a separate discipline, but as a medical instrument. The bimaristans — the hospitals of the Muslim world — used music as part of treatment for those suffering from anxiety, insomnia, mental disorders, and severe pain. Within these hospitals, instrumental music, Qur'anic recitation, singing, and the sound of running water from fountains all played at once. The environment healed alongside the physician.
Avicenna noticed something modern physiology only confirmed in the twentieth century: the rhythm of music influences the rhythm of the heart. Slow, steady melodies slow the pulse. Fast, sharp ones quicken it. This is not philosophy, this is biology. Avicenna wrote it down a thousand years before electrocardiography existed.
And finally, China. Here the system is arranged differently, but the idea is the same. The Huangdi Neijing, the Yellow Emperor's Inner Canon — the foundational text of Chinese medicine — describes five tones: Gong, Shang, Jue, Zhi, Yu. Each tone is connected to one of the five organs: spleen, lungs, liver, heart, kidneys. Each organ is connected to an emotion: contemplation, sorrow, anger, joy, fear. If a person carries excess anger, the liver tightens; then the Jue tone is needed to release what has accumulated. This is a system in which sound and body form a single table of correspondences.
Modern science has not "proven" this system in the sense it usually demands. But clinical studies using Five-Element music for depression, anxiety, and sleep disorders show reproducible effects. One after another, in different institutions. And Chinese medicine has been working in this language for two and a half thousand years, even if it has never been translated into the language of hertz.
What matters in all of this? Not to prove that 432 Hz does this or that. But to show: the conversation about sound and the body has never been exotic. It has been part of medicine wherever medicine has existed.
The modern Western world lost this conversation for a time. We decided to bring it back into our practice.
What happened to the frequency 432
To understand why we chose 432 Hz as the anchor frequency of our work, one inconvenient fact must be stated. The modern musical standard — the note "A" set at 440 Hz — has existed only since 1953. Before that date, the entire world played differently.
The history of this replacement is longer than it seems. In 1884, the Italian government, not without the involvement of the composer Giuseppe Verdi, passed a law fixing the note "A" at 432 Hz. Verdi argued that this tuning was the most natural for the human voice. That on this tuning the voice does not tire, and singers preserve their range longer. The 432 Hz tuning fork was for a long time afterwards known as "Verdi's pitch".
Antonio Stradivari, whose violins remain to this day the unreachable summit of craftsmanship and sell for millions, tuned his instruments to this same range. Norbert Brainin, first violin of the Amadeus Quartet, played a Stradivarius at 432 Hz throughout his life and insisted that the instrument was designed for precisely this frequency.
In 1910 the American Federation of Musicians adopted the 440 Hz standard, largely for the sake of unifying orchestras. In 1953 the International Organization for Standardization (ISO) made this decision global. That same year, twenty-three thousand French musicians signed a petition against it. They were politely ignored.
And since then, everything we hear — in headphones, in cafés, at concerts, on the radio — has been tuned to 440 Hz.
The difference between 432 and 440 is eight hertz. Less than two percent. Technically almost nothing. But if you listen to the same melody in both tunings, you will feel the difference before you can describe it.
The tuning fork and music — two different languages
Many people think that the work of sound ends at hearing. It does not. The human body is seventy percent water, and water is a perfect conductor of vibration. Every sound wave reaches the body twice: once through hearing, and again through the tissues. When music plays, you hear it and you physically receive it at the same time. You simply are not aware of the second part.
When music at 432 Hz is playing in the studio, it is like a change of climate in the room. The air becomes denser. The environment shifts. The nervous system receives a signal: you are safe here. And gradually it begins to come out of the defensive mode in which most modern people live constantly. This is work on the level of acoustics and space.
When a person picks up the tuning fork, something quite different happens. The steel begins to vibrate directly in the palm, and this vibration is no longer simply sound in the air. It becomes a physical impulse, entering the body without intermediary. Skin, muscles, fascia, bone receive the pure standard of frequency directly. The body, used to background noise and chronic internal tension, suddenly catches the rhythm of a pure oscillation. As a tuner applies a fork to the string of a piano and the string itself begins to sound in unison, so the body begins to respond to the frequency offered through the hand.
Music is atmosphere. The tuning fork is touch. One without the other works less well. Music prepares the environment, the tuning fork provides the point of entry. When they sound together, the body receives both the context and the signal.
And when we say that a 432 Hz tuning fork tunes the body, we are not speaking figuratively. The body really does tune. The pulse slows. The breath deepens. The parasympathetic nervous system, the one responsible for recovery, receives permission to engage. Recent cardiology research shows that listening to music at 432 Hz, compared with the standard 440, produces a measurable, reproducible reduction in heart rate and cortisol levels. This is not magic and not placebo. It is parasympathetic activation, measured by instruments.
What we know about 432 from our own experience
To understand how pure frequencies work, we spent some time studying them on ourselves. For three mornings in a row, as soon as we woke, we played a pure tone in the room — a different one each morning.
The first morning was the morning of 432. And for the rest of that day a single fine sensation remained, for which it is hard to find any word other than harmony. Not joy, not elation, but a steady accord with everything that happened. The day arranged itself, without effort.
This matches what we see in those who come to us for the first time. 432 is a frequency of permission. It does not excite, it does not activate, it does not call you anywhere. It allows. The body receives the signal that it can stop guarding, and gradually lets go. This is where any deeper work begins.
528 Hz — the frequency called love
Remember the eleventh-century monk and his hymn to John the Baptist? The one from which do, re, mi, fa, sol, la emerged. From this hymn also came the word "solfeggio", which has since named the system of pure musical tones. In the twentieth century, this scale was rediscovered and described as a set of frequencies, each corresponding to a particular state of body and soul.
528 Hz is one of these. It is often called the frequency of love. Not because it is about romance, but because it works at the level of the heart. It is the frequency at which a person begins to soften — first toward themselves, then toward everything around them. In the solfeggio tradition it is associated with restoration, with a return to wholeness, with the opening of the emotional centre.
And behind these words stands not only tradition. A 2018 study showed that five minutes of listening to a pure 528 Hz tone reduces cortisol and raises oxytocin compared with 440 Hz. Oxytocin is the hormone released when a mother looks at her child, when people embrace, when closeness and trust arise. The "frequency of love", as it turns out, is not entirely a metaphor. Biochemistry repeats what was said in the eleventh century.
The second morning of our small experiment was the morning of 528. The feeling that day was completely different — not as dense as with 432. It was a day on which one wanted to embrace. Not to achieve, not to do anything significant. Simply to be warm. Joy and love, in short. And that softness stayed until the evening.
963 Hz — the frequency that returns energy
And finally, the most subtle.
963 Hz is the highest note of the extended solfeggio scale. It is called by many names, and there are more words around it than one would wish. We chose from those words one — the simplest and, by our experience, the most accurate: energy. Not the energy of activity and productivity. The energy that unfolds from within, when the inner space has finally been freed of what was unnecessary.
There is almost nothing in the scientific literature about 963 Hz. And that is fine. Not everything that works has made it into research yet. A vast part of our knowledge of the body has never been measured by any instrument, and this does not make it untrue. It is simply another kind of knowledge — not laboratory, but observational. The same kind Pythagoras and Avicenna worked with. They had no instruments either. They watched, they listened, and they wrote down what they saw.
963 is an intense frequency. The third morning of our experiment was the morning of 963. And it was a very strange day, and at the same time a very right one. At first nothing happened, as if the frequency was quietly settling in, taking its time. Then something began to rise from within, and for a long while there was no name for it. Not excitement, not joy, but a quiet and full sensation, as though a map had unfolded inside. A vast map, with every possible route ever imagined. One could walk up to it and choose. One route, two, three. The rest could be set aside for tomorrow — they were not going anywhere. This lasted for hours, and through all of it there was a desire to do something no one had done before. Not from a wish to surprise, but because it had become suddenly clear that one could. The day that followed was different from any other — carrying that particular sense of being charged, which does not leave even when the body grows tired.
This is how we understood that these three frequencies together work as a generator. 432 gives harmony. 528 gives joy and love. 963 gives energy. And each of them charges the body for the day ahead, if you find it the right place.
What we see in all of this
In our studio we work with these frequencies in different ways. Some people come to us for the first time and hear a pure 432 Hz tone for the first time in their life. Others have already been to retreats, attended sound baths with copper or crystal bowls, meditated with a handpan, and instinctively know that a pure frequency is not an empty sound for the body. For some the body enters the work through 432 and stays there for the whole session. For others, it is clear already at the first meeting that something else is needed, and then we choose something else.
That is why we do not turn this into a formula. Each session is a conversation. The body itself shows which frequency it is ready to hear today. Our task is to listen to the body and offer what suits it now, in this particular moment.
This is not magic, nor an alternative to medicine. It is a very old form of knowledge, one Europe forgot for a time and is only now beginning to remember. Pythagoras, Plato, Avicenna, the authors of the Yellow Emperor's Canon — they knew that a particular sound, in a particular way, changes a person. They worked with this seriously. And here is what is important to understand: they were neither physicians in our modern sense, nor esotericists. Such words and such divisions did not exist back then. They were healers. They simply healed people with knowledge they gathered intuitively — through observation and through their own research. Day after day, year after year.
We have tried to return this knowledge to our practice. And like the ancient healers, we study it every day, beginning with ourselves. So that this method becomes one more tool — a tool with its own long history and its own philosophy.
The body always hears this frequency. It is only that no one tells it that it does. We have tried to speak about this. And not only to speak.