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 third tone in the solfeggio scale, 396 Hz reuses the UT syllable an octave-adjacent way up from 174 Hz and marks the boundary between the lowest, most grounded tones and the brighter, more active ones above it. It is a mid-low pitch with enough presence to hold attention without feeling harsh, and, like every tone in the generator, it plays as a clean, continuous sine (or other waveform) tone rather than a recording.
Traditionally tied to the solar plexus, 396 Hz is associated with releasing guilt and fear — letting go of old worry and, in the language often used around it, turning grief toward a more settled or even joyful state. It is a frequent choice for the start of a meditation session aimed at processing something specific, rather than pure background relaxation.
On this page the player opens with 396 Hz already highlighted on the Frequencies tab — tap the card to start it. Many listeners pair it with 417 Hz using the built-in "Calm" preset, since the two are traditionally framed as a pair (releasing the old, then inviting the new). It also works well layered with a steady ambient sound like brown noise or a distant thunderstorm for a session with less to react to.
If you want to add a rhythmic layer, a slow theta-band isochronic pulse tends to sit well underneath a release-themed session — it works without headphones, unlike a binaural beat, which needs stereo separation to have any effect at all.
396 Hz belongs to the modern set of nine solfeggio values popularized decades ago, not an ancient chant tradition, and the guilt-and-fear framing is a practice convention rather than a clinical claim — no health outcome is promised or implied. Use it as a focal point for relaxation or reflection, not as a substitute for professional support. See the full solfeggio frequencies chart for the complete set.
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.