How to listen to 432 Hz on YouTube

The short answer

Install Music Retuner — a browser extension (Chrome, Edge, Firefox, Brave) or Safari App Store app — and open YouTube or YouTube Music as you normally would. Pick 432 Hz in the extension, press play, and the entire video is retuned live. Works for any upload, not just ones that happen to be labeled "432 Hz."

Why you can't trust YouTube "432 Hz" labels

Anyone can upload a video and put "432 Hz" in the title. Some uploads are correctly retuned. Many are not — the audio is standard 440 Hz with a frequency-themed title and thumbnail. If you care about hearing 432 Hz on purpose, the only trustworthy approach is to retune the audio yourself.

Desktop (Mac, Windows, Linux)

1. Install Music Retuner:
   • Chrome / Brave
   • Edge
   • Firefox
2. Open youtube.com or music.youtube.com.
3. Click the Music Retuner icon and set the frequency to 432 Hz.
4. Play any video or track. Playback retunes live.

iPhone, iPad, and Mac (Safari)

1. Install Music Retuner from the App Store — $99.99 one-time, covers iPhone, iPad, and Mac Safari with Family Sharing included.
2. Open youtube.com or music.youtube.com in Safari.
3. Enable the Music Retuner extension and set 432 Hz.
4. Play.

Android

1. Install Firefox for Android from the Play Store.
2. Add the Music Retuner add-on inside Firefox.
3. Open YouTube or YouTube Music web in Firefox and retune.

What about the YouTube mobile app?

The native YouTube and YouTube Music apps can't be retuned by Music Retuner — the extension works on the web player. If you want retuning in the native app, you'd need a system-wide tool: Retuner Pro on desktop covers that case for Mac and Windows.

Can I retune a YouTube video to Solfeggio frequencies too?

Yes. Music Retuner supports 432 Hz, 528 Hz, and the full Solfeggio set (174, 285, 396, 417, 639, 741, 852, 963 Hz). Switch between them anytime without reinstalling.