528 Hz is the best-known Solfeggio frequency, often called the love frequency, and it is the tone this channel uses most. This page separates what 528 Hz is as a sound, where the name came from, and how we use it. The research is summarized with sources on a separate page.
Hear 528 Hz first. Play 528 Hz in the Frequency Lab (free, no sign-up), and compare it with the other eight tones.
What 528 Hz is (by calculation)
| Item | 528 Hz |
|---|---|
| Nearest piano note (A = 440 Hz) | 16 cents above C5 (523.25 Hz) |
| One cycle | about 1.89 ms (528 cycles per second) |
| Wavelength in air (20 °C) | about 0.65 m |
| Overtones (2x, 3x) | 1056 Hz, 1584 Hz |
| Where it sits | middle range |
528 Hz is about 16 cents above C5 (523.25 Hz). It is sometimes called a C, but not in standard tuning (A = 440 Hz); C becomes 528 Hz only when A is tuned to about 444 Hz. In 432 Hz tuning, C5 is about 513.7 Hz. So a “432 Hz” song contains no 528 Hz C, and a “528 Hz” C implies tuning slightly above 440 Hz; the two cannot both hold. 396:528 is exactly 3:4, a perfect fourth.
Distance to the other Solfeggio frequencies
100 cents is one semitone. Many of these distances fall between the intervals of ordinary music, which is one reason Solfeggio combinations sound unusual.
| Other tone | Distance | Nearest musical interval |
|---|---|---|
| 174 Hz | 1922 cents | 1 octave(s) + 722 cents |
| 285 Hz | 1067 cents | major 7th (33 cents narrower) |
| 396 Hz | 498 cents | perfect 4th (almost exactly) |
| 417 Hz | 409 cents | major 3rd (9 cents wider) |
| 639 Hz | 330 cents | minor 3rd (30 cents wider) |
| 741 Hz | 587 cents | tritone (13 cents narrower) |
| 852 Hz | 828 cents | minor 6th (28 cents wider) |
| 963 Hz | 1040 cents | minor 7th (40 cents wider) |
Where the number came from
The Solfeggio system became widely known after Leonard Horowitz’s 1999 book, which describes Joseph Puleo deriving 396, 417, 528, 639, 741 and 852 from verse numbers in the Book of Numbers. That account comes from the system’s proponents; no independent historical source has been found. 174, 285 and 963 Hz were added later. The often-repeated link to medieval Gregorian chant does not hold: there was no hertz unit and no fixed pitch standard in the Middle Ages, and the hymn Ut queant laxis gave us the syllables do-re-mi, not frequencies.
What research says (as of October 2026)
There are a few small human studies on 528 Hz, such as a 9-person, 5-minute study and a 162-person study measuring saliva markers; their results are limited. What they can and cannot support is laid out in the 528 Hz research summary. The “love frequency” name comes from the tradition, not from measurements.
How we use it
528 Hz appears in more of our published videos than any other tone, from a 3-hour near-pure tone to 8-hour sleep pieces. We measured three of our 528 Hz masters in October 2026 and found almost nothing above 13 kHz, and that in the 8-hour sleep track the strongest component was actually 264 Hz, an octave below (the measurement note).
As of October 2026, 53 of this channel’s published videos use 528 Hz (20 long-form). Some of the long ones:
- Ultimate Deep Sleep · 528 → 432 → 396 → 174 Hz Descent (8 Hours, Black Screen) (488 min)
- 528Hz Deep Sleep · 8 Hours (482 min)
- 528Hz Pure 3 Hours (180 min)
- Bathed in Solstice Light · 528·639·741Hz Love & Connection Meditation (60 min)
- 528Hz Japanese Zen Meditation Music · Love, Renewal & MI Tone (60 min)
- 528Hz (60 min)
None of these tracks plays a bare 528 Hz sine wave for its whole length; the tone is wrapped in overtones and layered with other sounds so it can be listened to for a long time.
Listening notes
- Start quietly. Pure tones reach the ear more strongly than music at the same level.
- Pure tones are for checking a pitch; for relaxing, a composed track is a better fit.
- This page does not promise any physical or mental effect. If you have health concerns, please see a doctor.
Frequently asked questions
Does 528 Hz repair DNA?
That claim traces back to books from the 1990s; no peer-reviewed study measuring DNA repair from 528 Hz sound in people or cells was found. See the research summary.
528 Hz or 432 Hz?
They are different kinds of thing: 528 Hz is one pitch, 432 Hz is a tuning reference for a whole piece. See 528 Hz vs 432 Hz.
Is it fine to listen to a pure 528 Hz tone for long?
At low volume it is no harder on the ears than music, but pure tones are monotonous and tiring. For long listening, a composed track is a better fit.
Related
This article does not guarantee any medical or health benefit and is not a substitute for professional medical care. If you have any health concerns, please consult a physician or other qualified professional.
