Song Shifter

Song Shifter is a Chrome extension for musicians, worship leaders, and music enthusiasts who need to change the key or tempo of YouTube videos in real time. Using a high-quality phase vocoder engine, Song Shifter shifts pitch up or down by up to 12 semitones without affecting playback speed — and adjusts speed independently without changing pitch. An automatic key detection feature analyses the audio and identifies the key of the track, making it easy to find the right transposition at a glance. Perfect for learning songs by ear, preparing for rehearsal, or transcribing music in an unfamiliar key. No downloads, no exports — just hit play and shift.