Chosen Hertz

Retune your music to the pitch you want, without wrecking the sound.

432 Hz · 528 Hz · the solfeggio tones · or any reference you set

Open the converter

Two ways to convert

Tape speed

Pitch and speed move together, the way a tape machine slows down. Nothing is rebuilt, so there is no artefact to hear.

A track runs 1.82% slower at 432 Hz — about four seconds on a four-minute song.

Keep tempo

Pitch moves, length stays exactly the same. For DJ sets, video, or playlists mixing retuned and standard tracks.

The audio is reconstructed to hold the timing, which costs a little clarity.

Pitches you can choose

The solfeggio tones are colour-coded to the chakras they are traditionally associated with. Set your own reference in the custom field — pick a note, type a frequency, and the app shows you exactly how far the pitch moves and where A lands.

Why it sounds better than the free converters

Install it

It works in any browser, and it installs like an app. On iPhone, tap Share then Add to Home Screen. On Android, accept the install prompt. Afterwards it opens full screen and works with no connection at all.

Open the converter

Questions

Can it retune Spotify or Apple Music?

No, and neither can anything else. Streaming audio is protected and no app can reach it. This works on files you own — downloads, rips, your own recordings, anything you can save to your device.

What files can I use?

WAV, MP3, FLAC, and M4A go in. WAV at 24-bit or 16-bit, and MP3 at 320 or 192 kbps, come out.

Which mode should I use?

Tape speed, unless you specifically need the original length. It is the only mode where nothing is reconstructed, so it is the one that cannot introduce artefacts. Most people never notice the small speed difference.

Does 432 Hz have health benefits?

Claims about healing or resonance frequencies are not supported by evidence, and this app makes none. What it does is precise: it moves the pitch to the reference you choose, cleanly. Plenty of people simply prefer how it sounds, and that is reason enough.

Is my music sent anywhere?

No. Everything happens inside your browser, on your device. There is no upload, no account, and no analytics watching what you convert.