The math behind 432 Hz
Modern standard tuning sets the A above middle C to 440 Hz. Retuning to 432 Hz multiplies every frequency by 432/440 = 0.9818, which equals 12 × log2(0.9818) ≈ −0.3176 semitones, or −31.8 cents. A cent is a hundredth of a semitone, so the change is small: noticeable side by side, subtle on its own.
The converter applies that exact shift with the pitch engine in Keep pitch mode, so the tempo and length of the song don’t change at all.
Common tuning conversions
| From → to | Shift | Note |
|---|---|---|
| 440 → 432 Hz | −0.318 semitones | The popular “432” tuning |
| 440 → 444 Hz | +0.157 semitones | Sometimes called “C = 528” |
| 432 → 440 Hz | +0.318 semitones | Back to standard |
| 440 → 415 Hz | −1.01 semitones | Baroque pitch, about a half step down |
An honest note
Many listeners prefer 432 Hz versions for their slightly warmer, softer sound, and that preference is perfectly valid. Claims that 432 Hz has special healing or health effects, however, aren’t supported by scientific evidence. Use it because you like how it sounds.