Play solfeggio tones, isochronic pulses, and ambient soundscapes together — or layer them all at once in The Lab. Everything is synthesized live in your browser — no downloads, no streaming.
174 Hz is the lowest of the nine solfeggio frequencies, carrying the UT solmization syllable. Because it sits below most of the range people associate with a clear musical pitch, it reads less like a note and more like a deep, physical hum — a tone many listeners describe as felt as much as heard, whether through speakers or headphones.
Within the solfeggio tradition, 174 Hz is linked to the root chakra and to themes of grounding, physical safety, and stability — the idea of a steady floor underneath everything else. It is often the first tone reached for when the goal is simply to settle: slowing down before sleep, taking the edge off a stressful stretch of the day, or easing into a seated meditation.
On this page the player is already set to 174 Hz — open the Frequencies tab below and tap the highlighted card to start the tone. It works well on its own as a low drone, or layered under an ambient soundscape like rain or ocean waves; the built-in "Sleep" preset pairs it with 285 Hz for a slightly fuller low-end foundation. No headphones are required, since a single solfeggio tone (unlike a binaural beat) does not depend on stereo separation.
For a deeper wind-down, try layering this tone with a slow delta-band binaural beat or isochronic pulse — both are designed for rest and deep sleep and sit comfortably underneath a low, grounded tone like 174 Hz. The Lab tab lets you combine the frequency, a pulse, and an ambient layer together in one mix without switching tabs.
The nine solfeggio Hz values are a modern set popularized in the 1970s–90s; despite the name borrowed from Guido d'Arezzo's 11th-century solfège syllables, they are not documented in Gregorian chant, and the grounding association is a tradition of practice rather than a clinical finding. Treat 174 Hz as a relaxation and meditation aid, not a medical treatment. See the full solfeggio frequencies chart for how it compares with the other eight tones.
Mood Presets
Solfeggio frequencies are a set of nine pure tones, spanning 174 Hz to 963 Hz, used as focal points in meditation and relaxation practice. Despite the name — borrowed from the medieval solfège syllables of Guido d'Arezzo — the nine Hz values themselves are a modern set that was popularized in the 1970s–90s, and each has since picked up a traditional intention listeners use to frame a session. This free online generator synthesises every tone directly in your browser using the Web Audio API. No downloads, no plugins, no account required.
You can play any single frequency or layer multiple tones simultaneously. Pair them with ambient soundscapes (rain, ocean, forest, thunderstorm) for a deeper meditative environment, set a session timer, or apply a mood preset to quickly load a curated combination of frequencies.
The nine solfeggio frequencies and the intentions popularly associated with each:
| Frequency | Name | Chakra |
|---|---|---|
| 174 Hz | Foundation | Root |
| 285 Hz | Quantum Cognition | Sacral |
| 396 Hz | Liberation | Solar Plexus |
| 417 Hz | Transmutation | Sacral |
| 528 Hz | Miracle Tone | Heart |
| 639 Hz | Connection | Throat |
| 741 Hz | Awakening | Third Eye |
| 852 Hz | Spiritual Order | Crown |
| 963 Hz | Divine Connection | Transcendent |
Solfeggio frequencies are a set of nine pure tones — 174, 285, 396, 417, 528, 639, 741, 852, and 963 Hz — used in meditation and relaxation practice. The name borrows from solfège, the medieval six-syllable system (ut–re–mi–fa–sol–la) attributed to Guido d'Arezzo in the 11th century, but the specific Hz values are a modern invention popularized in the 1970s–90s and are not found in Gregorian chant. In practice, each tone has come to be associated with a particular intention — releasing fear, connection, clarity — that listeners use as a focus during a session.
528 Hz is the best-known solfeggio frequency, often nicknamed the "Miracle Tone" or "Love Frequency." In the solfeggio tradition it is associated with transformation and renewal. You may also see it credited with "DNA repair" — that claim originates from a 1990s book, not from any scientific study, and there is no evidence that listening to a tone affects DNA. It remains a popular choice as a standalone meditation tone or layered with ambient sounds simply because many listeners find its pitch pleasant to sit with.
432 Hz refers to an alternative musical tuning standard (A4 = 432 Hz instead of the modern 440 Hz). Solfeggio frequencies are a separate, unrelated system — nine specific tones (174, 285, 396, 417, 528, 639, 741, 852, 963 Hz) that are not derived from any tuning standard or musical scale. Both are popular in the meditation and sound-therapy community, but they are distinct concepts.
Yes. This generator lets you activate any combination of the nine frequencies simultaneously. Each tone runs independently using the Web Audio API, so you can layer multiple Hz tones together without any interference or signal loss.
Sine wave produces the purest, cleanest tone and is the most common choice for meditation and relaxation sessions. Triangle is slightly softer with gentle harmonic overtones. Sawtooth adds brightness and edge. Square creates a more hollow, resonant character. For focused listening or sleep, sine or triangle are recommended.
Specific healing claims around solfeggio frequencies are not yet supported by large peer-reviewed clinical trials. However, sound therapy and the use of sustained tones for relaxation is an active area of research, with a growing body of evidence linking rhythmic auditory stimulation to reduced anxiety, improved focus, and better sleep quality. Many practitioners use these frequencies as part of a broader mindfulness or meditation practice.