ScaleShift — Pitch & Key Changer

Change the key of any song playing in your tab, live. Made for singers, musicians and karaoke. Audio never leaves your device.

ScaleShift changes the key of any song playing in your browser tab — live, without changing the tempo. Perfect for singers, musicians and karaoke. Sing a karaoke track that's too high? Drop it a few semitones. Playing along on guitar tuned down a half step? Match it in one click. Transcribing a solo or practicing a vocal run? Slow it down and loop it. HOW IT WORKS Open a tab playing audio or video (YouTube, SoundCloud, a karaoke site, etc.). Click the ScaleShift icon and connect it to the tab. Move the pitch up or down in semitones. Hear the change instantly. FREE Real-time pitch shift of up to ±3 semitones, tempo unchanged Works on the audio of the current tab Keyboard shortcuts: Alt+Shift+Up / Down to change pitch, Alt+Shift+0 to reset PRO (optional, one-time activation key purchased from the developer) Full ±12 semitone range plus cents-level fine tuning Volume boost up to 200% Playback speed (pitch preserved) and A-B loop for practice Vocal reduction for karaoke-style practice PRIVACY Tab audio is captured only after you click to connect, and is processed locally on your device. It is never recorded, stored or uploaded. ScaleShift does not collect your browsing history, page URLs or page content. If you activate Pro, your license key and a random installation ID are sent to our licensing server to verify it. Nothing else is sent. Pitch shifting is powered by the open-source SoundTouch library (LGPL-2.1).