Detect while you stream.
The HZ Detect extension measures tuning in real time while music plays — YouTube and YouTube Music in a tab, or desktop audio from apps like Spotify, Apple Music, and Pandora. No pausing, no switching windows.
Playing a "432 Hz" upload on YouTube? The extension measures it while it plays and shows you what's really there.
Capture desktop audio to check Spotify, Apple Music, Pandora — any app making sound on your computer — plus any mic input.
Free on Chrome. Audio is analyzed locally in your browser and never uploaded anywhere.
The extension tells you the truth about streams. The desktop flagship goes further: it analyzes every file you own and retunes songs from their measured tuning to your target — the only guaranteed way to listen at 432 or any Solfeggio frequency.
