The inner life
Solfeggio Frequencies
Direct answer
Solfeggio Frequencies: The solfeggio frequencies are a set of six, later nine, pitches such as 396, 528 and 852 hertz, presented since 1999 as a lost sacred scale with healing effects.
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At a glance
- Also called
- solfeggio frequency, solfeggio tones, 528 hz, solfeggio scale
- Found in
- Consciousness & Spiritual Psychology
- Related
- Concert pitch, Frequency, Binaural beats, Gregorian chant
The solfeggio frequencies are a set of six, later nine, pitches such as 396, 528 and 852 hertz, presented since 1999 as a lost sacred scale with healing effects.
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What are the solfeggio frequencies?
The solfeggio frequencies are tones at 396, 417, 528, 639, 741 and 852 hertz, to which later writers added 174, 285 and 963. Each is given a purpose in the literature that promotes them: 396 for releasing fear, 528 for repair or love, and so on. Recordings built on them are widely played as relaxation tracks online.
The set is modern. It was published in 1999 in a book by Leonard Horowitz and Joseph Puleo, which says Puleo found the numbers by a numerological reading of verse numbers in the biblical book of Numbers. The name borrows from solfège, the do re mi syllables. Medieval singers had no way to measure pitch in cycles per second, and no chant manuscript records these values. As sounds they are ordinary tones, slightly off the notes of a modern piano. The healing claimed for them has not been shown in controlled research.
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What sets Solfeggio Frequencies apart
The set is built from arithmetic and not from the ear. Every one of the numbers reduces to 3, 6 or 9 when its digits are added, and that pattern of digits, not any sound, is what the 1999 source offers as their proof. Played together the tones do not form a scale any musical tradition uses; the gaps between them are unequal and match no mode of chant. Their fame rests on one number, 528, and on the label of a miracle tone attached to it.
- Original six: 396, 417, 528, 639, 741 and 852 hertz
- Added later: 174, 285 and 963 hertz
- First published: Healing Codes for the Biological Apocalypse, 1999
- Stated derivation: a numerological reading of Numbers, chapter seven
- Name borrowed from: solfège, the syllables of Guido of Arezzo, eleventh century
- Digit pattern: every number reduces to 3, 6 or 9
Often mistaken for something else: Solfège names the steps of a scale by syllable, at any pitch a singer chooses; the solfeggio frequencies are fixed numbers of hertz first listed in 1999.
The story behind Solfeggio Frequencies
Solfège goes back to Guido of Arezzo, an Italian monk of the eleventh century, who named six notes ut, re, mi, fa, sol and la after the opening syllables of the lines of a hymn to John the Baptist, Ut queant laxis. He was naming steps of a scale, not fixed pitches. Vibrations each second were first counted in the seventeenth century, long after Guido, and the unit was named the hertz in the twentieth. The 1999 book joined the two, and the list spread through recordings and websites in the 2000s.
Why Solfeggio Frequencies matters
The numbers are everywhere in sound sessions and online music, and a reader deserves to know they date from 1999 and not from the cloister.
How to read Solfeggio Frequencies
Practitioners tune forks, bowls and recordings to the set; a careful reader treats the labels as a modern scheme and the listening as simple relaxation.
Solfeggio Frequencies in practice: an example
A listener who finds a track labelled 528 hertz calming is hearing a steady tone a little above the C that lies an octave over middle C, and the calm is real enough.
Where readings of Solfeggio Frequencies go wrong
No tone repairs DNA or removes illness. Enjoy the sound if it pleases, and take health problems to a doctor.
Sources and editorial method
This entry summarizes the tradition in the Almanac's own words; where no source is listed, it is an editorial summary rather than a primary text, and symbolic readings are named as the tradition's, not as fact.
- Source
- The Great Almanac Dictionary
- Category
- Consciousness & Spiritual Psychology
- Aliases
- solfeggio frequency, solfeggio tones, 528 hz, solfeggio scale, 396 hz, solfeggio frequencies meaning
- Last updated
- 2026-09-26
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Common questions
What are the solfeggio frequencies?
They are a list of pitches, most often given as 396, 417, 528, 639, 741 and 852 hertz, with 174, 285 and 963 added later. They are promoted as a sacred scale, each tone with its own effect.
Are the solfeggio frequencies ancient?
No evidence shows that they are. The list first appeared in a book of 1999. Gregorian chant was sung at whatever pitch suited the choir, and nobody could count vibrations per second in the Middle Ages.
Does 528 Hz repair DNA?
There is no sound evidence for it. The claim comes from the same 1999 source as the list. A few small laboratory and listening studies on 528 hertz exist, and none shows repair of DNA in people.
