Change any song to 444 Hz online
We measure your track's real A4 reference, then shift the whole recording so A4 = 444.000 Hz — the tuning in which C5 lands on 528 Hz. Pitch only, no tempo stretch, verified before you download.
Free, no account, no upload limits per file.
What this converter does
Most recordings are tuned to A4 = 440 Hz, but many sit slightly off that grid. The converter measures where your track actually is, then shifts the entire recording by the exact ratio 444 ÷ detected A4 so that A4 lands on 444.000 Hz and every other note moves with it. Nothing is time-stretched, so the performance stays intact.
- Verified against 444.000 Hz at your chosen tolerance — ±0.4, ±0.04 or ±0.004 Hz
- Pitch only: every note moves by one exact ratio and the tempo is never stretched
- Runs entirely in your browser — your audio is never uploaded to a server
- Downloads keep your source format: MP3, WAV, AAC, M4A or FLAC
- Batch mode: up to 30 files or 1 GB, whichever comes first, downloaded singly or as one ZIP
How it works
Upload
One track, or a batch of up to 30 files / 1 GB. MP3, WAV, AAC, M4A and FLAC.
Detect
FFT analysis measures the recording's real A4 reference to three decimal places.
Retune & verify
One exact ratio is applied to every note, then the output is re-measured until it passes.
Download retuned tracks
Save each song individually, or download a full batch as one ZIP file.
Who it's for
Worship & ministry music
Put a whole set list on one reference before rehearsal, so backing tracks, click tracks and live playing agree.
Vocalists & choirs
A slightly higher anchor adds brightness and presence without asking singers to relearn anything.
Producers & engineers
See exactly where a mix sits, then move it to 444 Hz with no time-stretching and no pitch artifacts.
Listeners & creators
Convert your own library, or music beds for a video series, and keep every file in its original format.
Frequently asked questions
- What is 444 Hz tuning?
- It sets the reference note A above middle C to 444 Hz instead of the 440 Hz standard. Every other note shifts with it by the same ratio, raising the whole piece by about 16 cents — and placing C5 on 528 Hz.
- Does converting to 444 Hz change the tempo?
- No. The recording is shifted by one exact frequency ratio, so the performance and its timing relationships stay intact. Total length changes by that same ratio — under one percent — and nothing is time-stretched.
- Will it reduce the audio quality?
- WAV and FLAC are retuned losslessly by rescaling the sample rate, so the samples are untouched. MP3, AAC and M4A are re-encoded because those formats only allow fixed sample rates. Either way the output keeps your original format and is re-analyzed to confirm the result.
- How accurate is the result?
- The converted file is decoded and re-measured against 444.000 Hz. A pass means it landed inside the tolerance you selected — ±0.4, ±0.04 or ±0.004 Hz. If it misses, the app re-converts from the fresh measurement and tries again, then reports the verified A4 and how many passes it took.
- How many files can I convert at once?
- Batch mode accepts up to 30 files or 1 GB, whichever limit is reached first. Each file is measured and corrected on its own, then downloaded individually or as a single ZIP.
- 444 Hz or 432 Hz — which should I pick?
- 444 Hz sits slightly above the standard, sounds a little brighter and more forward, and is the tuning in which C5 becomes 528 Hz. 432 Hz sits lower and warmer. The same converter handles both; switch modes any time.