You can now retune music on Spotify in real time

For about three years now, the question I've gotten more than any other is some version of: "Does this work on Spotify?" Until this week, the answer was no. Today I get to change that.

Music ReTuner — the browser extension I’ve been building and improving for the past couple of years — now works on Spotify, alongside YouTube, YouTube Music, and Apple Music.

That means you can now play any song from any of those four platforms, in your normal browser, and retune it in real time to:

• 432 Hz

• Any of the solfeggio frequencies (174, 285, 396, 417, 528, 639, 741, 852, 963 Hz)

• Or any custom A4 tuning you want to set yourself

No re-downloading. No converting files. No separate copies of every song. You just hit play, pick the frequency you want, and the audio retunes on the fly.

What else changed in this release

Alongside supporting Spotify, a few other things got upgraded:

• All four platforms in one extension. YouTube, YouTube Music, Apple Music, and Spotify are now consolidated. No more separate extensions or settings for each.

• Custom A4 tuning. You’re no longer locked to the preset solfeggio frequencies. Want to listen to your music at 450 Hz, 415 Hz, or anything else? You can now set it yourself.

• On/off toggle for the retuning effect. Previously, the only way to turn off retuning was to disable the whole extension. Now there’s a single toggle right in the popup — flip retuning on or off without losing your settings.

Most of the work in this update was about reducing friction — making retuning feel as seamless as normal listening, whether that’s switching platforms, changing frequencies, or turning the effect on and off without breaking the experience.

Try it

Music ReTuner is available now Chrome, Brave and Firefox.
Edge, Safari and Opera are under review (should be live in the next few days).

There’s a 7-day free trial. Install it, point it at the music you actually listen to, and decide for yourself whether the difference is real.

👉 Try Music Re-Tuner free for 7 days →

A lot of retuning tools make listening feel technical: separate apps, converted files, duplicated music libraries, constant setup.

I wanted this to feel simpler — open your browser, play the music you already listen to, and retune it in seconds.

— Yoav