What does converting to 432 Hz mean?
Most music today is tuned with the note A (A4) vibrating at 440 Hz, the international standard since the mid-20th century. Some musicians and listeners prefer 432 Hz tuning, which is slightly lower, and describe it as warmer or more relaxed. It’s a matter of taste: there are no conclusive studies showing it has special effects, but it is a legitimate tuning used on recordings and by some orchestras.
Going from 440 to 432 Hz means lowering the pitch by 1.8%, or about 31.8 cents (just under a third of a semitone). The tool makes exactly that change without touching the tempo: the song lasts just as long and plays at the same speed, only slightly lower. This is the right way to do it; simply slowing the audio down would also lower the pitch, but it would make the song longer.
Keep in mind that the conversion only makes sense if the original song is tuned to 440 Hz, which is standard for commercial music. If it was already in a different tuning, the result will be 31.8 cents below the original.
Everything is processed in your browser. The free trial lets you convert one song; with ToolStudio Pro you can convert entire albums in one go.
How to convert a song to 432 Hz
- Upload the song tuned to 440 Hz.
- Choose MP3 or WAV and the quality.
- Click “Convert to 432 Hz”.
- Listen to the result and download it.
Why convert to 432 Hz
- Listen to your favorite songs in 432 Hz tuning.
- Prepare music for meditation, yoga or relaxation.
- Play along with a recording on an instrument tuned to 432 Hz.
- Compare how a song sounds at 440 Hz and at 432 Hz.
Supported formats
- Input: MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WEBM, AIFF and the audio from MP4 or MOV videos.
- Output: MP3 at 128, 192, 256 or 320 kbps, or 16-bit PCM WAV.
- Up to 250 MB per file. The sample rate and channels (mono or stereo) are preserved.
Frequently Asked Questions
Does the song slow down when converted to 432 Hz?
No. Only the pitch drops by 31.8 cents; the length and tempo stay the same.
Can I use other tunings?
To shift the tuning to any other value, use the pitch shifter with fine-tuning in cents (for example, −32 cents is almost 432 Hz, and +39 cents takes you from 440 to 450 Hz).
Is my audio uploaded to a server?
No. Your audio is read, processed and converted right in your browser using the Web Audio API. The file is never uploaded to a server and never leaves your device.
Is it free?
You get one free try per tool: one audio file. You can reprocess that same file with different settings as many times as you like, but to process a new file you need ToolStudio Pro, which gives you unlimited use of every tool, batch processing (several files at once, downloaded together in a ZIP) and no ads. You can cancel anytime.
