432 Hz Tone

432 Hz is an alternative tuning reference for the note A4 - eight hertz below the modern standard of 440 Hz. In a 432-tuned orchestra, every note shifts down by about 32 cents (roughly a third of a semitone), so music sounds very slightly lower and, to some listeners, warmer or more relaxed.

The idea has real historical roots: before international standardization in 1939, concert pitch varied wildly by city and era, from around 415 Hz in baroque Europe to 450+ Hz in some 19th-century opera houses. Giuseppe Verdi campaigned for a legally fixed pitch of 432 Hz in Italy in 1884 - which is why 432 Hz tuning is sometimes called "Verdi tuning".

Claims that 432 Hz is mathematically aligned with the universe, water crystals, or DNA are not supported by physics - the hertz itself is an arbitrary human unit tied to the definition of the second. However, a handful of small studies have compared 432 Hz and 440 Hz music and reported modest effects: a 2019 study on dental patients found slightly lower salivary cortisol with 432 Hz music, and a small 2016 study measured a small drop in heart rate. These studies are small and not conclusive, but the honest summary is: some people genuinely find lower-pitched music more relaxing, and a 32-cent drop makes music measurably lower.

The best way to form an opinion is a blind A/B test: play the 432 Hz tone above, then open our 440 Hz page, and have someone switch between them while you listen without looking. The difference is subtle but audible to most people back to back.

Musicians can use the tone above as a tuning reference to tune A4 to 432 Hz instead of 440 Hz - useful for playing along with 432-tuned recordings or experimenting with the tuning yourself. Meditation practitioners often play the tone quietly in the background or use it as a starting drone.

The download button exports a 10-second WAV you can loop in any audio player or DAW. For a full set of alternative healing frequencies, see our Solfeggio frequencies generator.