Real-Time AI · On Your Mac

Split.
Rehearse. Play.

Play music in any app. Gecko captures the audio live and instantly splits it into stems — so you can jump in and play along.

Download on the Mac App Store $9.99 · One-time

Drums

Bass

Vocals

Other

Guitar

Piano

Live Stem Separation

Hear every part.
Own the mix.

Open Spotify, Apple Music, YouTube — whatever you play, Gecko captures it and separates it into six clean stems using on-device AI. No internet. No uploads. Just hit play.

Modes

Three ways to work.

Hybrid Mode

Capture a song and work with it as a full project. Set loop points, rearrange stems, and rehearse at your own pace.

Offline Batch

Drop in a folder of songs and let Gecko process them all. Export clean stems as WAV, FLAC, or M4A.

Audio FX

Load any Audio Unit plugin directly on a stem. Your signal chain, your sound.

A-B Loop

Loop any section.
Nail it.

Mark any part of the song and loop it endlessly. Slow down a tricky passage, focus on one bar, and get it right before moving on.

Transpose & Time Stretch

The right key.
The right speed.

Shift the key to match your instrument. Slow down without changing pitch. Detect tempo automatically — all in real time.

Tempo, stretch, transpose and key controls

Pricing

One price.
Everything included.

Mac App Store

^$9.99

One-time · No subscription

Real-time stem separation
Live remix & playback
Multitrack recording
A-B loop, transpose & time stretch
Camera & video export
Audio FX (Audio Unit plugins)
Offline batch processing
All future updates included

Download on the Mac App Store

Requires macOS 14.4 or later · Apple Silicon

Split.Rehearse. Play.

Hear every part.Own the mix.