Take the singer out. Keep the song.

Amazing Grace

Pitch

Original vocal 100%

Press play, then take the voice away.

This browser will not play the demo. Everything below still applies.

Both stems were separated from one public-domain recording by karanow. Your Mac does this live, to whatever is playing. Credits

A floating layer over whatever else is open — the tab you are singing along to does not have to be the window in front.

Over anything you happen to be doing

01
Play something
Anything that makes sound — Apple Music, Spotify, a browser tab. Nothing to import.
02
Press the button
The lead vocal comes out, on your Mac, about two seconds later. The band keeps playing.
03
Sing
Lyrics and the pitch line follow the backing track. Slide the original vocal back in whenever you want it.

A slider, not a switch: Blend the original vocal back at any level, from the same separation pass.
Lyrics that check themselves: Candidates are matched against album, duration and version tags before they are trusted.
A pitch line it learned: Sing a song once; the next play shows 7.5 seconds of the line ahead of you.
Takes that line up: Recordings map file time to song time. Start mid-chorus; it still fits.
Mics ranked by closeness: iPhone, then a plugged-in mic, then the built-in one. No app on the phone.
Inputs it refuses: Bluetooth headset mics and loopback devices. Both wreck what they listen to.
Menu bar, two languages: Controls without the window in front. 简体中文 and English.
Three themes: Every text pair checked against WCAG, in all six light-and-dark combinations.

Processed in memory, then dropped: A rolling window. Never written, never uploaded.
Only text goes out: Title, artist, album, duration — to match lyrics. Nothing else.
Recordings stay local: m4a files on your Mac. Delete them whenever you like.
Transcription is off: Until you switch it on. On-device, macOS 26 or later.

Try it on a song you already know.