Key Changer

I built Key Changer for singers and musicians who want to practise with tracks on supported websites in a different key. It is a pitch changer and pitch shifter for desktop Chrome, including YouTube, Spotify web and SoundCloud. Transpose the whole mix from -12 to +12 semitones without changing tempo, or fine-tune from -50 to +50 cents.

The optional Keep vocals natural setting helps preserve vocal timbre while the pitch changes. Key Changer uses my own proprietary WebAssembly pitch-shifting engine, and the extension is its first public application. It is currently free in early access. Install it in desktop Chrome and try it with a practice track on a supported website.