Measure the real frequency of your music.
This is the original hzdetect tool embedded for a modern, static site. It listens through your mic, samples musical notes, and matches them against tuning tables to reveal the true reference frequency.
Any tuning standard, including 432 Hz, 440 Hz, 444 Hz, and all Solfeggio frequency targets. Use it to validate uploads before you trust the labels.
Platforms do not validate tuning labels. Detect, then retune your own file for guaranteed accuracy.
Retune your musicWatch the quick walkthrough, then run the tool while music is playing near your mic.
Mic now, tabs and desktop via extension.
The web detector is limited to microphone input. The browser extension can also listen to tabs or desktop audio from apps like Spotify, Apple Music, Pandora, and more, plus any mic input.
Available on Chrome, Brave, Edge, and Firefox.
See the extensionHow it works
hzdetect samples the notes it hears and compares them to tuning tables. That reveals the real reference tuning, even when uploads are mislabeled.
Why not trust streaming labels?
Platforms do not validate tuning claims. Anyone can label an upload as "432 Hz" or "Solfeggio". Detection lets you confirm the truth before you listen or retune.
Platforms do not validate tuning claims. Detect the real frequency, then retune your own files to lock in the tuning you want.
Retune with confidenceMove from detection to guaranteed results by retuning your own music.
Retune now