If you’ve spent any time around modern sound healing, you’ve probably encountered 174 Hz at the bottom of a list of frequencies — quietly there, deeper than the canonical six, often described in a single line as the “foundation” or “grounding” tone. There isn’t much fanfare around it. It doesn’t show up in viral playlists the way 528 Hz does. It doesn’t have a famous nickname like “the love frequency” or “the god frequency.” But for the people who use it regularly, 174 Hz is one of the most important frequencies in the set — the one you reach for when nothing else feels right and the body just needs to settle.
This piece walks through what 174 Hz actually is, where it sits in the solfeggio family, what sound healers traditionally use it for, and what it sounds like when a song is retuned to it.
Where 174 Hz comes from
The original solfeggio scale is a six-tone hexachord — Ut, Re, Mi, Fa, Sol, La — traditionally attributed to the Italian Benedictine monk Guido d’Arezzo around the 11th century. The syllables come from a Latin hymn to John the Baptist, and the system Guido developed eventually became the modern do, re, mi, fa, sol, la, ti solfège that any music student today recognises. The original six tones — translated into modern Hertz values — are 396, 417, 528, 639, 741, and 852 Hz.
174 Hz is not part of that original six. It belongs to the extended solfeggio set, a set that grew up in the 20th century around the work of Joseph Puleo and Leonard Horowitz. They added three additional frequencies to the canonical six: 174 Hz at the bottom, 285 Hz a step above it, and 963 Hz at the very top. Their reasoning drew on numerology, harmonic relationships, and an attempt to extend the system into a fuller spectrum.
So when modern sound healers talk about “the nine solfeggio frequencies” or “all 9 solfeggio frequencies,” 174 Hz is the bottom of that nine-tone family. When they refer to “the original solfeggio frequencies,” they usually mean the six and 174 Hz isn’t included.
For practical use, the distinction usually doesn’t matter much. The extended set has been part of the working solfeggio tradition for decades now, and 174 Hz has its own established role within it.
How 174 Hz fits into the modern solfeggio family
The way most practitioners describe it, the solfeggio set has a kind of vertical logic: the lower frequencies do body work, the middle frequencies do interior emotional work, and the higher frequencies do mental and spiritual work. 174 Hz sits at the very bottom of that ladder.
That position matters. It means 174 Hz is rarely used as the centerpiece of a session — sound healers don’t typically build a meditation around it the way they might around 528 Hz or 432 Hz. Instead, it’s used as the starting point or the closing point: the tone you put on at the beginning of a long session to settle into your body, or the tone you reach for at the end of a hard day when the only thing you want is for your mind to stop running.
In the chakra system as it’s been mapped onto the solfeggio set, 174 Hz is associated with the root — though some traditions describe it as sitting below the root, almost as an “earth tone” rather than a chakra tone proper. The exact mapping varies by practitioner. What everyone agrees on is the directional sense: 174 Hz is down. It pulls toward the body, toward the floor, toward stillness.
How sound healers traditionally use 174 Hz
Three contexts come up over and over when you read or watch how 174 Hz is used in practice:
End-of-day wind-down. This is probably the single most common use case. Listeners describe putting on 174 Hz music in the last 30–60 minutes before sleep, when the goal is to slow everything down — heart rate, breathing, the cycle of thoughts. The deepness of the tone matches the direction the body needs to go.
Body-focused meditation and tuning-fork sessions. Practitioners doing body-scan meditations or sessions with weighted tuning forks reach for 174 Hz because it sits in a register the body responds to physically rather than emotionally. Some sound therapists specifically use 174 Hz weighted tuning forks placed on the body for what they describe as “physical settling” work.
Recovery contexts. People recovering from physical exertion, illness, or stress periods often gravitate to 174 Hz. The tradition associates it with grounding and a sense of safety, and many listeners describe it as the tone they want when they’re “just done.”
What you won’t typically find practitioners doing is using 174 Hz for active meditation, focus work, or anything stimulating. Its register is wrong for that. It’s a tone for arriving, not for going.
What 174 Hz actually sounds like
Technically, what’s happening when a track is retuned to 174 Hz is this: every note in the music gets pitch-shifted proportionally so that the note F3 — already part of the standard chromatic scale, sitting on the F two octaves below middle C — lands at exactly 174 Hz. Every other note moves with it. The reference note A4, which most modern music tunes to 440 Hz, ends up at approximately 438.40 Hz when the scale is anchored to 174 Hz at F3.
The intervals between notes are preserved exactly. This is the important part: the music doesn’t sound broken or out of tune. It still has its harmonic relationships intact, its melodies and chords still resolve. What changes is the overall reference frame. Everything sits about one and a half cycles per second below standard tuning, anchored to a much lower foundation note than usual.
To most listeners, the result is music that feels deeper than the original. Heavier, slower-feeling, even when the tempo is identical. Bass lines feel rooted to the floor. Vocals feel chestier. Ambient pads feel more enveloping. Music that was already calm at standard tuning becomes noticeably more so at 174 Hz.
It’s a small acoustic shift with a noticeable subjective effect. Whether you experience the shift the same way as the person next to you is its own conversation, but most listeners agree there is a shift, and most who use 174 Hz regularly report that they feel it.
Where to start with 174 Hz
If you’ve never listened to music tuned to 174 Hz before, the easiest entry point is to take a piece of music you already know well and simply retune it. Pick something slow and ambient if you can — a piano piece, a drone, a track you’d play for a long bath. Standard tuning vs 174 Hz on a familiar song is the cleanest way to feel what the shift actually does, because you’re listening through the lens of memory rather than encountering a new piece for the first time.
174 Player Plus is the tool we built for exactly this — point it at your music library, set 174 Hz, and any track you’ve ever owned plays at the new tuning, in real time, without altering the original file. You can switch back to 440 Hz on the same song with one tap and A/B as much as you want. It’s also free for the first 20 retunes, so the cost of trying is zero.
But the tool isn’t the point — the experience is. If you’ve been curious about 174 Hz, the answer to “should I try this?” is almost always yes: try it on three songs, late at night, with good headphones, and decide for yourself whether it does anything for you. Some people feel the shift immediately. Some take a few sessions to settle into it. Some don’t feel it at all and that’s fine too. The tradition has been around for decades; it isn’t going anywhere. You have time.