Diapasón retunes the music you play in your browser from 440 Hz to a warmer, gentler 432 Hz — live, with one click.

Works on: Spotify & Apple Music (web players), YouTube, YouTube Music, SoundCloud, Bandcamp and most embedded web players.

How it sounds: on DRM services like Spotify and Apple Music, the retune gently slows playback ~1.8%, so pitch and tempo shift together — a subtle change. For a pure pitch shift with no tempo change on the music you own, try the Diapasón desktop app.

Private by design — no account, no tracking, nothing uploaded. Free.