528, 432, 7.83: the numbers you've already heard of
If you have spent any time around sound, yoga or meditation, some numbers will already be familiar. They turn up on playlists, singing-bowl labels and wellness apps. Each one has its own story, and knowing the story makes listening to it more interesting.
528 and the Solfeggio tones
528 belongs to a set of nine tones known as the Solfeggio frequencies: 174, 285, 396, 417, 528, 639, 741, 852 and 963. Their name reaches back to an eleventh-century hymn, Ut queant laxis, whose lines gave the monk Guido of Arezzo the syllables ut, re, mi, fa, sol, la — the do-re-mi we still sing.
The numbers themselves are more recent: they were published in the 1990s and spread from there. In that tradition each tone has a meaning, and 528 is the best known — often called the "love frequency". Many people say it is the one they return to.
432 and the warmer A
Most music today is tuned so that the A above middle C is 440 vibrations a second, a standard agreed internationally in the twentieth century. Before that, tunings varied from city to city. Giuseppe Verdi argued for an A of 432, and the "Verdi tuning" has its followers today.
People who prefer 432 often describe it as warmer, rounder and more relaxed. You will find 432 in many of the Rife presets, often as the last tone of a set.
7.83, the Earth's own rhythm
Lightning strikes the Earth about fifty times every second. That energy rings around the gap between the ground and the upper atmosphere, like a bell, at about 7.83 times a second. The physicist Winfried Otto Schumann predicted it in 1952, and it has been measured ever since: the Schumann resonance.
It has quieter overtones too, near 14, 20, 27 and 33 times a second. People often point out that 7.83 sits close to the rhythms of a resting, relaxed mind, and many listeners like the idea of tuning in to the planet's own pulse.
And the Earth's year
One more you may meet: 136.1, sometimes called the "OM" tone. It comes from the length of the Earth's year around the sun, carried up many octaves until it can be heard. The same idea gives the Moon's tone, about 210.42.
What the Rife presets are — and aren't
The presets carry the name of Royal Raymond Rife, an American inventor who worked with frequencies in the 1920s and 1930s, because that is the name many people know them by. On this site a Rife preset is a list of frequency numbers, shown as it has been published, and played as sound through your speakers or headphones.
They are not Rife's instruments or any device, not a treatment programme, and not a replacement for standard care. They are tones to listen to — on their own, or underneath a session of phrases.
Where to hear them
- Meditation: Solfeggio Complete, Solfeggio Sacred 6, Solfeggio / Chakra
- Natural / Earth: Schumann Fundamental (7.83), Schumann Resonance and Grounding (with the overtones), Earth Cycle (136.1), Lunar
- Balance & Coherence: Unified Coherence Grid brings 7.83, 432, 528 and 963 together
Any of them can play on its own or under the phrases of a session. A favourite pairing is the Earth tones underneath Sleep & Rest from Essentials in the evening — explore Essentials to find the group that suits your day.
Notes describe how the site works and how to listen. They are not medical advice; a sound session is not a treatment.