Unvox removes vocals from songs using digital signal processing that runs entirely in your browser. Because the audio never leaves your device, there is no upload queue, no file-size anxiety and no privacy trade-off.
The current engine uses center-channel extraction — the same class of technique behind classic karaoke removers — which excels on mainstream stereo mixes where vocals sit in the middle. A neural-network engine for deeper separation is in development and will run on-device on capable hardware.