Traditional solfeggio meanings?

Traditional Puleo assignments: 396 UT (liberation), 417 RE (change), 528 MI (love/DNA), 639 FA (relationships), 741 SOL (expression), 852 LA (intuition). Plus 174 (foundation), 285 (quantum cognition), 963 (crown chakra). Cultural framings, not biological facts.

432 vs 440 Hz tuning?

Audible difference is real (~31.8 cents quarter tone). Personal preference. Claims of 432 Hz biological superiority or 440 Hz being deliberately introduced for manipulation are conspiracy theories without evidence. Use what you prefer for practice.

Inverse of Earth orbital period, octave-reduced ~32x to audible range. Math: 31556925 sec → 0.0000317 Hz → 136.1 Hz. Associated with OM/AUM in chant traditions. Real frequency from real math; meaning depends on whether Earth-orbital framing speaks to you.

Meditation tradition uses pure sines almost exclusively. Adding triangle/square/sawtooth would change timbre away from conventional sound. Use Tone Generator under Wave Generators for harmonic-rich variants. This tool stays sine-only by design.

How do meditation bells work?

When meditation timer active and bell schedule selected, schedules gentle 880 Hz sine bursts (~1.5 sec, soft attack + longer decay). Schedules: Start+End or Every 5/10 min. Bells play independently of carrier so they overlap, not interrupt.

Works as ambient meditation audio. For sleep specifically: Delta Wave Generator (brown-noise sleep-targeted) or Sleep Induction Builder (multi-band descent) are better choices. Use this for daytime meditation.

Save favorite frequencies?

Stateless — no local storage in this version. 12 presets cover most-requested; free-frequency slider for any pitch. Write down unusual frequencies you want to revisit. Future iteration may add URL-parameter sharing.

Avoid if epilepsy/seizure disorder. Don't listen at uncomfortable volume — pure sines can sound piercing. Don't substitute for medical/psychological care. If managing a condition with 'frequency X heals it' claims, consult clinician. Meditation aid, not treatment.

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Meditation Frequency Generator 12 curated frequencies

Pure sine tones for the meditation-tradition frequencies: OM 136.1 Hz, the nine solfeggio frequencies (174 / 285 / 396 / 417 / 528 / 639 / 741 / 852 / 963 Hz), 432 Hz "natural tuning", and 440 Hz concert A. Meditation timer with optional interval bells, configurable fade in/out, ambient noise mixing.

⚠ Educational tool. These frequencies are AUDIBLE pitches (real pure tones), but the broader claims often associated with them — solfeggio "DNA repair", 528 Hz "love healing", 432 Hz biological superiority — are not supported by scientific evidence. Treat as cultural / aesthetic tools, not therapy. Don't substitute for medical care.

Frequency presets

Free frequency

Frequency 528.00 Hz

Log 50 – 1000 Hz. Drag for any audible frequency outside the presets.

Meditation bells

Optional gentle 880 Hz bell tones at meditation milestones. Schedule activates when the meditation timer is set above Off.

Ambient noise

Ambient volume 25 %

Pink noise default — balanced meditation texture.

Master

Volume 30 %

Comfortable, moderate volume. Pure sines can sound piercing if too loud.

Idle — press Play.

Meditation timer

Time remaining

—:——

Audio fades over the configured fade-out at session end.

Fade in / fade out

Fade duration 8 s

Applied at session start and end. Longer fades feel more meditative; shorter is more responsive.

Live readouts

Selected frequency

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Next bell · sample rate

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Audio output waveform (live)

Meditation Frequencies — What and How

Up front: the frequencies are real, the claims often attached to them are not. All 12 presets in this tool produce clean, audible sine tones at exactly the labeled frequency. You can verify them with any FFT analyzer. What's not verified is the wider tradition: that 528 Hz "repairs DNA", that 432 Hz is biologically superior to 440 Hz, that each solfeggio frequency aligns a specific chakra or healing function, or that listening to these tones produces specific physical or therapeutic effects. Those claims trace to alternative-medicine literature and are not supported by mainstream science.

Treat these as a curated set of meditation tones with cultural and aesthetic significance. Some practitioners find specific frequencies subjectively useful for sitting practice; others find them all equivalent. Use them if the framing helps your practice; ignore the supernatural claims.

The 12 presets

136.1 Hz (OM) — sometimes called the "Earth tone", derived from the orbital period of the Earth via octave reduction. A warm low-mid frequency widely used in chant-style meditation.
174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, 963 Hz — the nine "solfeggio" frequencies. The current solfeggio set was popularized by Joseph Puleo in the 1990s based on a numerical interpretation of medieval church-music nomenclature; it is not a direct continuation of historical Gregorian chant practice. The frequencies themselves are tones; the assigned meanings (UT/RE/MI/FA/SOL/LA/SI and the chakra/healing associations) are esoteric tradition, not science.
432 Hz — an alternative tuning for A that some musicians prefer over the standard 440 Hz. Claims that 432 Hz is more "natural" or biologically harmonizing are not supported by evidence; the audible tonal difference is real but the cognitive/health effects are not.
440 Hz — the standard concert-pitch A4 used by orchestras since the early 20th century. Included here for direct comparison with 432 Hz and as a sanity-check tone.

Why only sine waves?

Meditation-tradition use of these frequencies is overwhelmingly with pure sines — the simplest possible tone, no harmonic content. If you want harmonic-rich versions for general sound design, use the Tone Generator or Wave Generators category. Sticking to sine keeps this tool focused on its intended use.

Meditation timer with bells

The timer fades audio in over the configured duration, holds, and fades out at the end. Optional bells provide gentle 880 Hz tone bursts at meditation milestones: just start, start + end, or every 5 / 10 minutes. The bell volume is set to be noticeable without being startling.

Choosing a fade duration

Default 8 seconds matches the other tools in this category. Longer fades (15–30 s) feel more ceremonial and meditative; shorter fades (2–5 s) are more responsive but less ritualistic. Match the fade to the mood you want for the session start and end.

Frequently Asked Questions

Are solfeggio frequencies scientifically validated?

The frequencies themselves are obviously real audible pitches — that's just physics. The broader claims — 528 Hz "DNA repair", chakra alignment, each frequency healing a specific organ or emotional state — are not supported by peer-reviewed research. Most originate from alternative-medicine literature and esoteric tradition. If you find a frequency subjectively pleasant or meaningful for meditation, use it; if you're hoping for measurable biological effects, the evidence isn't there.

What does each solfeggio frequency "mean" traditionally?

The traditional assignments (popularized by Puleo) are: 396 Hz UT — liberation from guilt/fear; 417 Hz RE — facilitating change; 528 Hz MI — love / "miracle" frequency / DNA; 639 Hz FA — relationships; 741 Hz SOL — expression / problem-solving; 852 Hz LA — intuition. 174 Hz is "foundation/pain relief"; 285 Hz is "quantum cognition / healing tissue"; 963 Hz is "crown chakra / divine consciousness". These are the cultural meanings — useful as framing for practice, not as biological facts.

Does the 432 Hz vs 440 Hz tuning debate matter?

For meditation: probably not, beyond personal preference. The audible difference is real (about 31.8 cents — a quarter tone). Some musicians prefer 432 Hz for its slightly warmer character; others prefer 440 Hz as the standard everyone tunes to. Claims that 432 Hz has special biological-resonance properties, that it's the "natural" tuning, or that 440 Hz was deliberately introduced to manipulate the population, are conspiracy theories without evidence. If you like one over the other for your practice, that's enough reason to use it.

What is OM 136.1 Hz?

It's the frequency you get when you compute the inverse of one Earth-orbital-period in seconds, then octave-reduce until it's in the audible range. The math: orbital period ≈ 31,556,925 seconds → ≈ 0.0000317 Hz → octave up ~32 times brings it to ~136.1 Hz. The result is associated in some chant traditions with the OM/AUM sound. It's a real frequency derived by real math; what it "means" depends entirely on whether you find the Earth-orbital framing meaningful.

Why only sine waves?

Meditation-tradition use of these frequencies is almost always with pure sines — no harmonics, simplest possible tone. Adding triangle/square/sawtooth would change the timbre away from the conventional sound. If you want richer harmonic content, the Tone Generator (under Wave Generators) supports all standard waveforms; this tool stays sine-only by design.

How do the meditation bells work?

When the meditation timer is active and a bell schedule is selected, the tool schedules gentle 880 Hz sine-tone bursts (about 1.5 seconds each, with a soft attack and longer decay) at the chosen intervals: "Start + End" plays one at session start and one at end; "Every 5 / 10 min" adds interval markers. Bells play independently of the carrier tone, so they overlap rather than interrupt the meditation frequency.

Can I use this for sleep?

It can work as ambient meditation audio for falling asleep, but for sleep specifically there are better-suited tools: the Delta Wave Generator targets the actual delta-band brainwave entrainment with brown noise defaulted on, and the Sleep Induction Builder will provide a multi-band descent. Use this tool for daytime meditation; use the sleep tools for actual sleep onset.

Why isn't there a "save my favorite" option?

Same as other tools in this category — stateless, no local storage in this version. The 12 presets cover the most-requested meditation frequencies, and the free-frequency slider lets you target any pitch. If you find an unusual frequency you want to revisit, write it down. A future iteration may add URL-parameter sharing.

Are these frequencies safe?

As pure audible tones at moderate volume, yes — they're acoustically equivalent to any other sine wave you might encounter. The "safety" concerns sometimes raised in alternative-medicine literature (specific frequencies causing harm, or specific frequencies being required for healing) are not based on evidence. Just keep the volume reasonable; sustained loud pure tones can be fatiguing or contribute to hearing fatigue.

Safety reminders?

Avoid if you have epilepsy or a seizure disorder. Don't listen at uncomfortable volume — pure sine tones can sound piercing. Don't use as a substitute for medical or psychological care; if you're managing a condition with claims that "frequency X heals it", consult a clinician. This is a meditation aid, not a treatment.

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