Healing Frequencies
Solfeggio 639 Hz — Connection
639.00 Hz
Cosmic Octave Color
Derived visible color (427 nm)
Display swatch #5862fc
SpeculativePractitioner / Traditional Claim
Evidence Level
Speculative
Source Count
1
Last Reviewed
March 23, 2026
Documented as a claim or emerging idea, but not established as a replicated scientific conclusion.
This entry is included because it is culturally or practitioner-relevant. Any therapeutic interpretation should be read as contextual and non-diagnostic.
Review the evidence modelAssociated with interpersonal harmony and healing relationships. Fourth of the original Solfeggio frequencies.
Wavelength
53.7 cm
Nearest Note
D#5 (+46¢)
Claim Type
Practitioner / Traditional Claim
Cosmic Octave Color
Derived visible color (427 nm) · #5862fc
Source
Dr. Joseph Puleo (1999)
Sources
Joseph Puleo / Solfeggio Tradition
5 atlas references
Commonly cited modern lineage for Solfeggio claims. Included for provenance, not as settled scientific consensus.
Joseph Puleo and modern Solfeggio literature.
Historical Use
Harmonizing relationships, connection
Octave Ladder
Every audible octave of this frequency — the same tone, higher and lower.
Nearby in the Atlas
Entries within ±35 cents of this tone when reduced to the same octave — candidates for pairing or comparison.
Alpha (Mid)Brainwaves
10.00 Hz+2.7¢
Beta (Mid)Brainwaves
20.00 Hz+2.7¢
Gamma (Low)Brainwaves
40.00 Hz+2.7¢
40 Hz Binaural BeatHealing Frequencies
40.00 Hz+2.7¢
solfeggiohealingconnection