Ten modes · Your choice
Solfeggio Frequencies, Explained: The 10 Tones and When People Use Them
174 Hz to 963 Hz. Ten tones, each paired with a color of light. Here's what each one is traditionally associated with, and the two ways to use them on The OneDevice.
The short answer
Solfeggio frequencies are a set of tones used in sound-healing practice, each traditionally linked to a quality such as grounding, renewal or calm. The OneDevice plays ten tones: the nine classic Solfeggio frequencies plus 432 Hz, a tuning popular in sound practice. Research on the specific tones is limited, so treat their meanings as tradition rather than established science.
Two ways to use the ten tones
There's nothing to set up and no app required. The ten tones are programmed into the pendant, and you choose how to use them.
Choose one
Hold the pendant flat in your hand and gently tap the case to select a tone. Use this when you want a specific setting for a specific moment, like focus before work or a wind-down in the evening.
Let it rotate
Rotation mode plays all ten in a programmed order, then starts again. It's the default and the easiest way to wear it every day.
Rotation mode, in order
Good to know
Rotation mode follows a programmed sequence. It doesn't read your body or choose a tone for you. Modes in OneApp, our companion app in beta, are separate from these ten built-in settings.
The ten tones, one by one
Each tone is paired with a color of visible light, plus near-infrared light you can't see. The associations below come from sound-healing tradition. The "when people use it" column is how owners tend to fit each tone into their day.
| Tap | Color | Tone | Traditionally associated with | When people use it |
|---|---|---|---|---|
| 1 | Quartz | 174 Hz | Grounding, security and stability | When you want to feel grounded or calm |
| 2 | Red | 285 Hz | Renewal, vitality and physical restoration | After activity |
| 3 | Orange | 396 Hz | Creativity; releasing guilt, fear and heaviness | After stressful moments |
| 4 | Yellow | 417 Hz | Inner strength and moving through old patterns | Studying, focusing, working through change |
| 5 | Yellow green | 432 Hz | Natural harmony and ease | Meditation, rest, feeling overwhelmed |
| 6 | Green | 528 Hz | Love, expansion and emotional harmony | After a long day |
| 7 | Light blue | 639 Hz | Communication and connection | Meetings, conversation-heavy moments |
| 8 | Indigo | 741 Hz | Focus, intuition and mental clearing | When you want clarity |
| 9 | Violet | 852 Hz | Connection to your higher self | Evening wind-down, before sleep |
| 10 | Light violet | 963 Hz | Oneness and spiritual awareness | Deep meditation |
| 11 | Rotation mode | All ten | A full-spectrum sense of balance | Everyday wear |
A simple way to choose
If ten options feel like a lot, start from the moment you're in rather than the number.
Starting work
Yellow, 417 Hz, or indigo, 741 Hz
A day of calls
Light blue, 639 Hz
After a workout
Red, 285 Hz
After a hard moment
Orange, 396 Hz
Coming home
Green, 528 Hz
Winding down
Violet, 852 Hz
Meditation
Yellow green, 432 Hz, or light violet, 963 Hz
Not sure
Rotation mode
What the research says, and doesn't
Sound and light have each been studied as wellness practices, and the effect of light timing on the body clock is well established. The specific Solfeggio tones are a different story. Research is early and thin. One small 2018 study measured stress markers while people listened to 528 Hz music, and there is little beyond that. We'd rather say so plainly than overstate it.
For a fuller look at what each color of light does and where the evidence stands, read Light and Sound Therapy: How Light and Sound Affect Your Body.
Find what works for you
The most useful evidence for you is your own. Pick one tone for one moment, say violet each evening, and wear it that way for a week before you judge it. Then try another, or go back to rotation mode.
If you already wear a ring or watch that tracks heart rate variability, note your baseline before you start and look at weekly averages rather than single days. Our guide HRV: A Signal, Not a Score explains how.
Frequently asked questions
What are the 10 Solfeggio frequencies on The OneDevice?
174, 285, 396, 417, 432, 528, 639, 741, 852 and 963 Hz. Nine are the classic Solfeggio tones; 432 Hz is a tuning frequency popular in sound practice. Each is paired with a color of light.
Is 432 Hz a Solfeggio frequency?
Not in the classic set. It's a tuning frequency many sound practitioners use for meditation and rest, which is why it's included on the device.
Which Solfeggio frequency is used for sleep?
Traditionally, people use 852 Hz (violet) for an evening wind-down. No single frequency is proven to improve sleep, and habits like dimming the lights matter more. See why you sleep 8 hours and still wake up tired.
Does rotation mode adjust to what my body needs?
No. Rotation mode plays the ten tones in a fixed, programmed order. It doesn't sense or respond to your body.
Can you hear the tones?
You may hear a soft hum in a quiet room. Most people stop noticing it during the day.
The OneDevice is not a medical device and is not intended to diagnose, treat, cure or prevent any disease.
