432 Hz tone generator
Play it, then press the 440 Hz button and listen to the two back to back. The difference is about a third of a semitone — small, real, and easy to over-interpret.
432 Hz is an alternative tuning reference for the note A above middle C, instead of the standard 440 Hz. The gap is roughly 32 cents — about a third of a semitone. Music tuned to 432 Hz is very slightly lower in pitch than the same music at 440 Hz, and that is the whole of the physical difference.
Where the 440 Hz standard came from
Concert pitch drifted for centuries: surviving instruments and tuning forks from the 18th and 19th centuries sit anywhere from roughly 415 to 450 Hz. 440 Hz was adopted as an international reference in the 20th century largely so that orchestras, instrument makers and broadcasters could agree on something. It is a convention, chosen for coordination — not a discovery, and not imposed on the world by anyone in particular.
What people claim about 432 Hz, and what holds up
| Claim | Status |
|---|---|
| Sounds warmer or calmer to some listeners | Plausible as a preference. A lower pitch can be perceived differently, and expectation strongly shapes what we hear. |
| Matches a natural or universal frequency | The numerology is elegant and the physics is not there. The proposed connections rely on arbitrary unit choices — seconds and metres are human conventions. |
| Has measurable health effects | A handful of very small studies have compared 432 and 440 Hz music. They are too small, too varied and too weakly controlled to support a health claim, and we do not make one. |
| Was standardised for sinister reasons | A persistent story with no historical support. The standardisation record is mundane. |
Listen for yourself, properly
- Play the 432 Hz preset for fifteen seconds.
- Switch to 440 Hz without changing the volume.
- Switch back. Notice how much of the difference you can still hear once you are not being told which is which.
That last step is the interesting part. Comparing two tones you can name is not a blind test, and pitch preference is exactly the kind of judgement that expectation moves. If you prefer 432 Hz after doing this, that is a real preference — enjoy it as one.
Using 432 Hz as a carrier
If you want a binaural beat over a 432 Hz carrier, the third preset does it: 432 Hz in one ear, 440 Hz in the other produces an 8 Hz alpha beat. It is a pleasant combination, and it is worth noticing that this is also exactly the difference the two tuning standards are apart.
Questions
Is 432 Hz better than 440 Hz?
Not in any measurable sense. It is a slightly lower tuning reference, and preferring it is a matter of taste rather than a demonstrated benefit.
What note is 432 Hz?
It is the note A above middle C, tuned about a third of a semitone below the standard 440 Hz.
Can I convert my music to 432 Hz?
Audio software can pitch-shift a track down by about 32 cents, which is what most “432 Hz versions” online are. That is a shift of the whole recording, not a re-performance.
Does 432 Hz reduce stress?
We would not claim it does. Studies comparing the two tunings are small and inconsistent; any calm you feel listening to a steady tone is worth having on its own terms.