440 Hz vs 432 Hz: concert pitch or an alternative tuning?
By TechCompare · Updated · How we check
Use the reference agreed by the ensemble or recording. A440 is the international standard, while A432 is an alternative aesthetic choice. Scientific pitch at C4 = 256 Hz is a separate reference.
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The international standard versus the 8 Hz-lower alternative.
A4 = 440 Hz is the international concert-pitch reference. A4 = 432 Hz is an alternative eight hertz lower, sometimes associated with Verdi tuning. It is not identical to scientific pitch, which fixes C4 at 256 Hz.
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Side-by-side specs
| Spec | 440 Hz (A440 / concert pitch) | 432 Hz (alternative A4 tuning) |
|---|---|---|
| Frequency of A4A4 is the A above middle C, the note orchestras tune to. | 440 Hz | 432 Hz |
| Standard status | ISO standard since 1955 (better on this spec) | Alternative / cultural choice |
| Used by most orchestras | Yes (better on this spec) | Rarely |
| Used by meditation / ambient | Sometimes | Commonly (better on this spec) |
| Compatibility with sheet musicThe written notes stay the same. Only the sounding pitch changes. | Same written notes | Same notes, retune instruments |
| Scientific evidence for benefits | None claimed (it's a standard) | Little to none |
How they differ
In twelve-tone equal temperament, C4 = A4 / 2^(9/12). A432 therefore gives C4 about 256.87 Hz. Fixing C4 at 256 Hz instead gives A4 about 430.54 Hz. Those are different tuning references. Changing the reference pitch retunes the same written notes, rather than transposing the score into a different key. Musicians playing together should agree on a reference, since ensembles may choose values other than A440.
Verdict
Choose A440 when matching standard-tuned instruments, or retune together if an ensemble prefers another reference. The same sheet music works at A432 without transposition. The difference is the sounding reference pitch, not the written notes.
Hear 440 Hz vs 432 HzWhich should you pick?
Choose 440 Hz (A440 / concert pitch)
440 Hz is the default for any collaborative context: playing with other musicians, matching standard-tuned instruments, recording for general release. It's the international standard and the usual reference.
Choose 432 Hz (alternative A4 tuning)
432 Hz makes sense for solo ambient, meditation, or new-age music where the pitch, about 31.8 cents lower than A440, is part of the intended aesthetic. Be aware that anyone trying to play along on a standard-tuned instrument will need to retune.
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Frequently asked questions
Is 432 Hz scientifically proven to be better than 440 Hz?
Why is 440 Hz the international standard?
Should I tune my instrument to 432 Hz?
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