Press kit

Everything on this page may be used as is. If something you need is missing, write to us.

Boilerplate

karanow is a macOS app that takes the lead vocal out of whatever the Mac is playing, in real time, so you can sing to it.

karanow turns anything a Mac plays into a backing track. It reads the system audio output rather than any one app, so Apple Music, Spotify, a browser tab and a video player all work the same way. Separation runs on the Mac itself with a low-latency HTDemucs model; the first sound arrives about two seconds after the button is pressed and the backing carries on from there. The notes of the original singer are drawn on screen and your own pitch is drawn over them. Audio is processed in memory and is never written to disk or uploaded. karanow requires Apple Silicon and macOS 14.2 or later.

Facts

Current version	1.0.5
macOS	14.2 or later
Processor	Apple Silicon
Download size	282 MB
Interface languages	Follows the system, 简体中文, English
Price	7 days free, then £12.99 a year. In mainland China, a one-year pass for ¥98.

What it is

On-device: separation runs on the Mac, and audio never leaves it.
Real time: the backing track starts about two seconds in and keeps pace with the song.
Works with any app that plays audio, because it reads the system output rather than an app’s interface.

What it is not

Not a catalogue: it has no library of songs. The music is whatever you already play.
Not an exporter: the backing track exists while it plays and is never saved as a file.