Traditional / experimental practice
Solfeggio 852 Hz · Pure Tone
Three minutes of a 852 Hz pure tone. Beneath it, as in the Deep Field, a light, dark sound field built from the pitch's lower octave and fifth, with hall reverb; the tone itself stays plain. One of the main stops of the Solfeggio Path. The Solfeggio list is a modern spiritual interpretation; no scientific effect is claimed.
A traditional or spiritual practice, not a scientific claim.
Liner notes
- Body
- Pure tone · 852 Hz, Cluster drone · 106.5 Hz
- What do you hear?
- tonal · narrow · continuous
How is this sound made?
- Pure tone−29 dB
Pure tone · 852 Hz
- Cluster drone−33 dB
Cluster drone · root 106.5 Hz, 8 oscillators
- Reverb: hall, 35% mix
In the room you can listen to each layer on its own, change its settings and save it as your own recipe.
Sound is generated on this device in real time; no files are downloaded from a server. There is a 8 s fade-in at the start and a 0 min fade-out at the end.
Compare with another sound
Hear both at the same loudness; drag the slider to the middle and they blend.
In the middle the two sounds truly blend; loudness is matched.
What do we know, what don't we know?
T · Traditional/spiritual practiceLast reviewed 7 October 2026
No scientific claim is made; it is offered as a cultural or personal practice.
A traditional or spiritual practice, not a scientific claim.
The meanings of the Solfeggio frequencies
A modern spiritual interpretation; not a scientific claim.
Evidence level T: Traditional/spiritual practiceWhat do we know?
- Medieval solfège syllables (ut, re, mi…) are real music history.
- Today's list assigning Hz values to them is a modern spiritual interpretation, popularized by a non-peer-reviewed book published in 1999.Horowitz & Puleo 1999
- Lists vary between sources: some count six tones, others nine.
What don't we know?
- Evidence gapThe meanings given to the tones have not been scientifically tested, and different sources assign different meanings.
Studies
- Horowitz & Puleo 1999 · Book (not peer-reviewed)
A session's level is the weakest of its linked claims; it is never raised by a strong but unrelated claim.
Its neighbours on the map
The five sounds closest to this one by measured sound features.
- 1Solfeggio 741 Hz · Pure ToneBright · steady · no melodyBoth tone and drone · both steady · same goal: explore
- 2Solfeggio 963 Hz · Pure ToneBright · steady · no melodyBoth tone and drone · both steady · same goal: explore
- 3Solfeggio 639 Hz · Pure ToneBright · steady · no melodyBoth tone and drone · both steady · same goal: explore
- 4Solfeggio 396 Hz · Pure ToneBright · steady · no melodyBoth tone and drone · both steady · same goal: explore
- 5Solfeggio 528 Hz · Pure ToneBright · steady · no melodyBoth tone and drone · both steady · same goal: explore
Keep your device volume comfortable, preferably below 60%. You can also use your device's headphone-safety settings.