01
Load audio
Drop a file or pick from Your Library. Decoding stays local.
432 Hz Converter
Retune a track from standard 440 Hz to 432 Hz (or 528 Hz). Preview live, then download — all in your browser.
Drop an audio file here
or click to choose from your computer
MP3 · WAV · FLAC · AAC · M4A · OGG
0.98×
Original: — New duration: —
0:000:00
Working…
Local processing in your browser · Files are not uploaded to our servers
What is the 432 Hz Converter?
The 432 Hz Converter retunes a recording that was mixed or performed against the modern concert pitch of A = 440 Hz so that the same material sits at A = 432 Hz instead. Practically, that means scaling playback by the ratio 432 ÷ 440 ≈ 0.9818 — about 1.8% lower in pitch and slightly longer in duration. Many listeners describe the result as warmer or calmer; whether it “feels better” is subjective. Sound Booster only does the math and the export — we make no health or scientific claims about tuning systems.
Under the hood the tool uses simple resampling (playback-rate change baked into the export). That is the same approach most free online 432 converters use: pitch and tempo move together, which keeps the sound natural without complex time-stretch artefacts. If you need pitch change without tempo change, use the Pitch Shifter with “preserve tempo” instead.
A 528 Hz preset is included for people exploring Solfeggio-style targets (528 ÷ 440 ≈ 1.2). The 440 Hz (original) preset resets the rate to 1× so you can A/B against the source. Everything runs in your browser: load MP3, WAV, FLAC, AAC, M4A or OGG, preview, then download a WAV. Your file never leaves your device.
Use the converter on full songs, stems, ambient beds, or meditation tracks. Pair with Equalizer or Bass Booster if you want tonal shaping after the retune, or with Speed Changer if you need a different tempo after landing on 432.
440 Hz vs 432 Hz
Modern Western instruments and most commercial releases reference A above middle C at 440 Hz. 432 Hz tuning lowers that reference by 8 Hz, shifting every note down by the same ratio. Historically, concert pitch has varied by region and era; 440 Hz became a widespread standard in the 20th century. Choosing 432 Hz today is a creative or personal preference, not a requirement for “correct” music.
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Pick 432 or 528
One click sets the exact ratio. Fine-tune with the Speed / Pitch slider if you want.
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Preview & download
A/B with Original, then export a WAV at the new rate.
Frequently asked questions
How do I convert to 432 Hz?
Load the track, click Convert to 432 Hz, preview, then Download. The rate is set to 432/440, about 0.982×, and the speed slider shows the value so you can see what the tool is doing. Use the 440 Hz (original) button to switch back and compare before you export.
Does it change the speed?
Yes, slightly: the track becomes about 1.8% longer for 432 Hz, because resampling moves pitch and tempo together. A four-minute song grows by roughly four seconds, which most listeners will not notice. The new duration is displayed before you download, so you can check it.
What is 528 Hz?
A higher target ratio (528/440), about 1.2×, which raises the pitch by roughly three semitones and shortens the track. It is included as an optional preset only, with no special claims, for people who want to experiment with that tuning. Use the 440 Hz preset to return to the original.
Is my file uploaded?
No. Conversion and export run entirely in your browser. The file is decoded on your device, resampled locally and saved to your downloads, so your music does not need to be sent to Sound Booster servers. That keeps meditation tracks, drafts and purchased music private.
Can I keep tempo the same?
This tool links pitch and tempo, because it uses simple resampling. For pitch-only changes, use Pitch Shifter with preserve tempo. Since the 432 Hz shift is only about a third of a semitone, the speed difference is small, but if exact timing matters, handle that step in a different tool.
How much lower is 432 Hz than 440 Hz?
The 432/440 ratio is about 0.982, which lowers every note by roughly 32 cents. That is less than a third of a semitone, so the change is subtle: most songs still sound in tune with themselves, but they sit slightly lower than the original recording. The shift applies to the whole track equally.
Does 432 Hz have proven health or spiritual benefits?
Sound Booster only does the math and the export; it makes no health, scientific or spiritual claims about tuning systems. Many listeners describe 432 Hz as warmer or calmer, but that is a personal impression, and strong evidence for special effects is limited. Treat it as a creative preference and trust your own ears.
How much longer will my song get?
Divide the original length by about 0.982. A three-minute song becomes about 3 minutes 3 seconds, and a one-hour mix grows by about a minute. The tool shows the original and new duration before you download, which helps if the file has to fit a fixed length.
How can I tell if a track is already tuned to 432 Hz?
Most recordings use 440 Hz, but some artists tune to 432 Hz on purpose. Play a sustained note with a tuner app or spectrum tool and see which reference it matches. If it is already near 432 Hz, converting again would lower it further, so compare the result with the original first.
Can I play an instrument along with the converted track?
Yes, but set your instrument to match. Most tuner apps and digital keyboards let you change the reference pitch from A = 440 Hz to A = 432 Hz. If you play along with the converted file without changing it, you will sound about a third of a semitone sharp against the track.
Related tools
Keep editing with other browser-based tools on Sound Booster.