Solfeggio frequencies
Nine tones from 174 Hz to 963 Hz — hear each one, learn where the numbers come from.
What the Solfeggio scale is
The Solfeggio set is nine specific frequencies — 174, 285, 396, 417, 528, 639, 741, 852, and 963 Hz — popular in meditation music and sound-relaxation communities since the late twentieth century. Each tone below has its own player, anchor link, and nearest standard note so you can hear exactly what the number sounds like.
Where do the numbers come from? Proponents cite a medieval chant framework and number patterns, but historians note the familiar nine-number list is a modern selection rather than a documented historical tuning. In practice the tones serve as drone notes, chime targets, and reference points for ambient compositions.
How these tones are used in music and meditation
Ambient composers use Solfeggio tones as sustained drones or slow chime sequences, often layered with reverb and soft pads. The frequencies sit in the warm low-to-mid range, blending pleasantly with acoustic instruments and making forgiving practice targets for singing bowls, tuning forks, and synthesizers.
Listeners typically play them quietly in the background while reading, resting, or practicing breathing exercises — the same way one might use rainfall sounds or slow piano loops. Different people find different drones pleasant, so the entries below stay neutral and let you judge each sound yourself.
174 Hz — near F3
The lowest tone of the set sounds as a low, mellow hum near F3 — only 6 cents flat — with a slow, spacious character on a sine wave. Its long wavelength makes it a popular drone choice for quiet background layers, where it sits under other sounds without competing.
Try it against the 285 Hz tone above it to hear how the set climbs in uneven steps rather than musical intervals. Keep the volume modest: low tones tempt listeners to turn up, but the energy adds up quickly on headphones.
174 Hz
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285 Hz — near C#4
At 285 Hz you hear a tone almost halfway between C4 and C#4 — 48 cents sharp of C#4 — giving it a slightly tense color against standard tuning. It falls in a comfortable midrange that small speakers reproduce easily, so it sounds full even on a phone.
Because it sits near middle C, it works well as a reference when comparing the brighter upper members of the set. Play it back to back with 174 Hz to feel the lift between the two lowest tones.
285 Hz
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396 Hz — near G4
This tone lands close to G4, just 18 cents sharp, so singers and instrumentalists will recognize it as an ordinary warm pitch. It is one of the most approachable entries in the set because it matches the vocal range where most melodies live.
Ambient pieces often use 396 Hz as a bell-like accent over a lower drone. Listen for how plain and musical it sounds — a useful reminder that these numbers are simply fixed pitches with distinctive labels.
396 Hz
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417 Hz — near G#4
Only 7 cents above G#4, the 417 Hz tone is practically a standard-tuned pitch, which is why it blends so easily with guitars and keyboards. Its brightness sits a half step above 396 Hz, and alternating the two makes a gentle two-chord sway.
If you play an instrument, try tuning one string reference to this player and notice how little adjustment a G# needs. The exercise shows how fine the line is between special-number mystique and everyday pitch.
417 Hz
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528 Hz — near C5
The most talked-about member of the set sits 16 cents above C5 — a bright, clear pitch an octave above middle C. Its fame comes from music-community nicknames rather than acoustics: as a sound wave it behaves exactly like any nearby frequency.
There is a dedicated 528 Hz detail page with a player, testing notes, and background. Treat online claims about this number with the same skepticism as any extraordinary claim lacking evidence.
528 Hz
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639 Hz — near D#5
At 639 Hz the tone falls 46 cents sharp of D#5, close to the midpoint toward E5, which gives it a bright, forward edge. It projects well on small speakers and cuts through background pads, so composers often reserve it for lead chime lines.
Compare it with 528 Hz below and 741 Hz above to hear the set narrow and widen its steps. The uneven spacing is part of why the collection sounds like a scale of its own rather than a standard mode.
639 Hz
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741 Hz — near F#5
Essentially a standard F#5 — just 2 cents sharp — this tone will sound familiar to anyone who has heard high violin passages. Its purity on the sine setting makes it a good upper-range check for tweeters and earbuds.
Because it aligns so closely with concert tuning, ensembles can double it with real instruments with almost no adjustment. Play it softly: high tones in this octave feel louder than the volume knob suggests.
741 Hz
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852 Hz — near G#5
Sitting 44 cents above G#5, the 852 Hz tone carries a keen, silvery quality that stands out clearly in a quiet room. Small pitch differences become easy to hear up here, making it a fine ear-training target for sharpening interval judgment.
Alternate it with 741 Hz to hear a wide leap, then with 963 Hz for a tight step. Short listening bursts at low volume are the comfortable way to explore this register.
852 Hz
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963 Hz — near B5
The highest tone of the set rests 44 cents flat of B5, near the familiar 1 kHz test-tone neighborhood. It sounds thin and penetrating as a sine wave — unmistakable, and best enjoyed briefly and quietly.
Closing a session here after climbing from 174 Hz tours the whole collection in about two minutes. If any high tone feels uncomfortable, stop and return to the lower members of the set.
963 Hz
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Frequently asked questions
What are the 9 Solfeggio frequencies?
The commonly listed nine are 174, 285, 396, 417, 528, 639, 741, 852, and 963 Hz. Each has its own section and player on this page with an anchor link, so you can jump straight to any tone and hear it as a pure sine wave.
Where do Solfeggio frequencies come from?
Supporters link the numbers to medieval chant syllables and number patterns, but the familiar nine-tone list is a modern selection popularized in late-twentieth-century wellness and meditation circles. It is best understood as a contemporary musical convention rather than a documented historical tuning system.
Do Solfeggio frequencies heal anything?
No — there is no scientific evidence that these frequencies heal, treat, or diagnose any condition. People enjoy them as ambient music and relaxation background, which is a matter of personal taste. Treat any healing claims you see elsewhere with skepticism.
Which Solfeggio tone should I try first?
Start with 396 Hz or 417 Hz: both sit in a comfortable vocal range and sound like ordinary warm musical pitches. Play each tone below at low volume, compare them with the note labels, and keep whichever drones you personally find pleasant.