Quick answer432 Hz music is music tuned so the note A sits at 432 hertz instead of the usual 440 Hz. It sounds about a third of a semitone lower, a little softer and darker. Small studies found a slightly lower heart rate and less stress with 432 Hz music, but there is no proof that the 432 Hz frequency heals the body. As sleep music it works the way calm music does: it helps you relax and drift off.
Listen: 432 Hz healing music for sleep (8 hours)
Press play for eight hours of 432 Hz music made for sleep: soft tones tuned to 432 hertz, slow bells at about 50 beats per minute and a warm, low drone. There are no sudden changes, so you can leave it on all night. The theme is the alchemists' Philosopher's Stone: the moment something heavy turns into light.
- TuningA = 432 Hz
- Length8 hours
- TempoAbout 50 BPM
- Best forFalling and staying asleep
- SoundSoft tones, bells, low drone
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What is 432 Hz? The 432 hertz frequency in plain words
Hertz (Hz) counts how many times a sound wave vibrates each second. Every musical note has a frequency, and musicians tune all the notes from one reference note: the A above middle C. Today the standard is A = 440 Hz, often called A440. 432 Hz music simply tunes that A to 432 Hz, so every other note moves down by the same small amount.
How big is the change? 432 Hz is about 1.8% lower than 440 Hz, which is 31.8 cents, or roughly a third of a semitone. Most people cannot tell the two apart on their own, but side by side the 432 hertz version sounds slightly deeper and warmer. Much of the "432 Hz music" on YouTube is ordinary music shifted down to this tuning; our sleep music is composed in 432 Hz from the start.
You will also see it called 432 Hz frequency music, 432 hertz healing music or just 432hz. They all mean the same thing: music tuned to A = 432 Hz. Standard tuning is written 440 Hz or 440hz.
432 Hz vs 440 Hz: hear the difference
432 Hz vs 440 Hz tone player
Play a pure 432 Hz tone, then switch to 440 Hz. Pressing the other button changes the tone smoothly so you can compare them. Many people say the 432 Hz sound frequency feels a little rounder.
Press a button to hear the tone. Start with your volume low.
These are pure sine tones, not music, so they will sound plain. Keep the volume low and use headphones for the clearest comparison. Nothing is downloaded; the tones are made in your browser.
| 432 Hz tuning | 440 Hz tuning (A440) | |
|---|---|---|
| Note A above middle C | 432 vibrations per second | 440 vibrations per second |
| Difference | 8 Hz, about 1.8% or 31.8 cents (a third of a semitone) | |
| How it sounds | Slightly lower, warmer, softer | Slightly higher and brighter |
| Who uses it | Meditation, sleep and "healing frequency" music; some musicians by choice | The international standard since 1955 (ISO 16); most recorded music |
| Evidence for health effects | A few small studies, no proof of healing (see below) | |
Is 432 Hz healing music real? What the studies say
Claims about 432 Hz go from "it relaxes you" to "it is the frequency of the universe" and "it heals your DNA". Here is everything the research actually shows, with the size of each study:
| Study | Who | What they found |
|---|---|---|
| Calamassi & Pomponi, 2019 | 33 volunteers, the same film music at 432 Hz and 440 Hz | Heart rate about 5 beats per minute lower with 432 Hz; blood pressure and breathing dipped slightly; listeners felt more focused and satisfied. A small pilot study. |
| Aravena et al., 2020 | 42 dental patients before a tooth extraction | Both 432 Hz and 440 Hz music lowered anxiety compared with no music. Only the 432 Hz group had lower salivary cortisol, a stress hormone. |
| Calamassi et al., 2020 | 12 patients with spinal cord injury, music for sleep | Sleep scores improved after 432 Hz music but not after 440 Hz music. Very small group. |
| Cochrane review, 2022 | 13 trials, just over 1,000 adults with insomnia | Listening to calm music at bedtime improved sleep quality (moderate-certainty evidence). The trials used slow relaxing music, not a special frequency. |
Our honest reading: the 432 Hz results are interesting but come from tiny studies that need repeating. The strong evidence is for calm music in general. So 432 Hz healing music can help you sleep because it is slow, soft and steady, and the gentler tuning may add a little to that. Claims that it heals illness, "repairs DNA" or "raises your vibration" have no scientific support, and we do not make them.
Where the 432 Hz idea comes from (and the myths)
- Tuning used to vary. Before the 20th century, the pitch of A changed from city to city, often anywhere from about 415 Hz to over 450 Hz. France fixed A at 435 Hz in 1859.
- Verdi asked for 432 Hz. In 1884 the composer Giuseppe Verdi wrote to the Italian government asking for a lower standard A of 432 Hz. This is the most solid historical root of the "Verdi tuning".
- 440 Hz became the standard. A conference in London in 1939 chose 440 Hz for radio broadcasting across Europe, and the International Organization for Standardization adopted it worldwide in 1955 (ISO 16). Many orchestras actually tune a little higher, around 442 Hz.
- Myth: "the Nazis imposed 440 Hz." No document links Joseph Goebbels to the 1939 meeting, which the British organised, and Britain already used 440 Hz.
- Myth: "432 Hz is the frequency of the universe." Links between 432 Hz and planets, the Schumann resonance (about 7.83 Hz) or sacred geometry come from numerology, not physics. 432 Hz is a pleasant tuning, not a cosmic constant.
How to use 432 Hz music for sleep and meditation
- Start it when you get into bed, so your body links the sound with sleep.
- Keep the volume low, just above the point where you can hear it.
- Use a speaker or soft sleep headphones rather than hard earbuds.
- Dim the screen. Turn your phone face down; the sound keeps playing while the video runs.
- For meditation music, sit comfortably, breathe slowly with the bells (about one every second) and come back to the sound whenever your mind wanders. Our meditation guide has simple exercises.
- Give it a week. Using the same sleep music every night works like a routine: it becomes a signal that it is time to rest.
432 Hz or 528 Hz?
Both are popular healing frequency music for sleep. 432 Hz is a tuning: whole pieces of music are tuned around A = 432 Hz, so it sounds like normal music, only softer. 528 Hz is a single tone from the so-called solfeggio frequencies, nicknamed the "love frequency", and 528 Hz music is built around that one note. Neither has strong scientific proof of healing; choose the one you find more calming. You can listen to our 8-hour 528 Hz music and compare.
Frequently asked questions
Is 432 Hz better than 440 Hz?
For relaxing, many listeners prefer 432 Hz because it sounds slightly softer, and small studies found a slightly lower heart rate with it. But the studies are tiny, and 440 Hz is not harmful: it is simply the modern tuning standard used in most music.
What does 432 Hz do to the brain and body?
In small studies, 432 Hz music was linked with a heart rate about 5 beats per minute lower, lower cortisol before dental surgery and better sleep scores in a group of 12 patients. There is no evidence that it changes brain waves in a special way or heals illness.
Is it safe to sleep with 432 Hz music all night?
Yes, for most people, as long as the volume is low. Use a speaker or sleep headphones and set a timer if you wake up easily. Do not listen while driving.
Where can I listen to 432 Hz music on YouTube?
You can play our 8-hour 432Hz music on this page or on our YouTube channel. It is free 432 Hz music YouTube-style, made for sleep and as healing meditation music.
Is there Pachelbel's Canon in 432 Hz?
Yes. Pachelbel's Canon in D is one of the most popular classical pieces retuned to 432 Hz, and many versions are on YouTube. Any piece can be shifted from 440 Hz to 432 Hz; it sounds the same, only a little lower. Our sleep music is original and composed in 432 Hz, with no melody to follow, which makes it easier to fall asleep to.
Is 432 Hz the frequency of the universe?
No. That claim comes from numerology. 432 Hz is a musical tuning that some people find pleasant; it is not a natural constant of physics or nature.
How can I tell if music is really in 432 Hz?
Use a tuner app while the music plays: if the note A reads about 32 cents flat compared with 440 Hz, the music is tuned to 432 Hz. Our 432 Hz music is composed in that tuning from the start.
What are other healing songs and frequencies?
Popular choices include 528 Hz "love frequency" music, other solfeggio frequencies such as 396 Hz and 639 Hz, singing bowls and slow classical music. What helps most is music that is slow, soft and steady.
In other languages: Spanish música 432 Hz or frecuencia 432 · Portuguese frequência 432 hertz · German 432 Hz Musik · French musique 432 hertz.
Sources
- Calamassi D, Pomponi GP. Music tuned to 440 Hz versus 432 Hz and the health effects: a double-blind cross-over pilot study. Explore, 2019. DOI: 10.1016/j.explore.2019.04.001.
- Aravena PC, Almonacid C, Mancilla MI. Effect of music at 432 Hz and 440 Hz on dental anxiety and salivary cortisol levels in patients undergoing tooth extraction. Journal of Applied Oral Science, 2020.
- Calamassi D, Lucicesare A, Pomponi GP, Bambi S. Music tuned to 432 Hz versus music tuned to 440 Hz for improving sleep in patients with spinal cord injuries. Acta Biomedica, 2020.
- Jespersen KV, Pando-Naude V, Koenig J, Jennum P, Vuust P. Listening to music for insomnia in adults. Cochrane Database of Systematic Reviews, 2022.
- Focus (Italy): the history of A=440, Verdi and the "Nazi tuning" myth.
Written by The Mystica editorial team. Last updated November 11, 2026. This page is for relaxation and general information, not medical advice. If poor sleep lasts more than a few weeks, talk to a doctor.