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.
The solfeggio scale is a set of nine pure tones — 174, 285, 396, 417, 528, 639, 741, 852, and 963 Hz — each carrying a solmization syllable borrowed from solfège (ut, re, mi, fa, sol, la, ti) and a traditional association used as a focal point in meditation and relaxation practice. The chart below lists all nine side by side with their name, chakra association, and a short description of the intention traditionally attached to each one; the full player is loaded on the Frequencies tab underneath it, so you can tap any row and hear the tone immediately.
Reading the chart top to bottom roughly traces a progression the tradition often follows in a longer session: 174 Hz and 285 Hz sit at the grounded, restorative end; 396 Hz and 417 Hz are framed around releasing old patterns and starting fresh; 528 Hz, the best-known "Miracle Tone," sits at the emotional center of the scale; 639 Hz turns outward toward communication and relationships; and 741 Hz, 852 Hz, and 963 Hz climb toward clarity, spiritual order, and — at the very top — a sense of unity and connection.
None of the nine tones need to be used in that order, or at all together — the chart is a reference, not a prescription. A common approach is to pick one or two tones whose traditional theme matches what you are after (grounding before sleep, clarity before focused work, and so on), or to reach for one of the built-in mood presets, which combine two or three tones from the chart into a ready-made pairing like Sleep, Calm, Focus, or Meditate.
It's worth being clear about where this chart comes from: the specific Hz values are a modern set popularized in the 1970s–90s, not a formula recovered from Gregorian chant, despite the solfège names borrowed from Guido d'Arezzo's 11th-century system. The chakra and thematic associations reflect how the tones are used in sound-meditation practice today, not a scientifically established effect, and nothing here is a medical claim. Treat the chart as a guide for building a relaxation or meditation session, and see each tone's own page for more detail on its traditional meaning.
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.