The ten frequencies / 639 Hz
639 Hz
The frequency of connection
Every relationship in your life is a mirror. 639 Hz teaches you to look.
One of the six Solfeggio frequencies Joseph Puleo published in the 1990s.
What it is for
Forgiveness is usually framed as a gift to the person who hurt you. Research frames it the other way around: the person who benefits most is the one who forgives. Psychologists who study it, including Everett Worthington over several decades, link a held grievance with a stress response that fires again each time the memory returns.
In the Solfeggio tradition, 639 Hz is the tone of relationships and repair. I use it for forgiveness, for loneliness and for grief after a loss, including forgiveness of yourself.
What it can feel like
A softening around the heart, and warmth that moves outward instead of in. Sometimes a face or a memory surfaces with less charge than it usually carries. Let it come. Do not force it.
Everyone’s body answers in its own way. Notice what yours does rather than looking for what someone else described.
What the research says
No study has tested 639 Hz on its own. The research is on forgiveness itself, and it is substantial.
The tone does not make forgiveness happen. It lowers the guard enough that the work can begin.
What the research shows about sound, breath and frequencyHow I use it
- After at least five minutes of 174 Hz.
- Twenty to thirty minutes.
- After 528 Hz for heart work, or on its own for grief after a relationship ends.
Headphones carry the tone best. Never while driving.
In the course
- Day 16The Heart Opening StackThe Heart Opening Stack
- Day 19Your daily practiceOne of the ten frequencies to choose from
This tone also plays on its own in Frequency Studio.
A question to take with you
Who are you still in an energetic contract with that part of you knows it is time to release?
From Chapter 17 of Frequency Shift, which goes deeper into this frequency.
Before you can heal anything, you have to feel safe enough to try.