Stemly Split

AI-powered stem separation running 100% locally on your Mac. Isolate vocals, drums, bass, guitar, and piano using the Demucs AI engine — the best open-source quality available. Choose from six separation modes, or build a custom scheme — instead of one single "drums" stem, split it further into kick, snare, and cymbals, alongside bass and other elements, for full creative control over every part of the mix.

For users with large libraries, Stemly Split includes a built-in alphabetical session browser — even with 100-200 processed sessions, you can instantly find any session and play it back right away through the built-in mixer, with full solo/mute control over every stem. No searching through folders, no re-loading files — just pick a letter and go.

Free to try with up to 90 seconds of audio processing. Unlock unlimited processing length for $22.99 (one-time in-app purchase).

Key features:

Demucs AI engine — best open-source quality.

6 separation modes + custom scheme builder (e.g. kick, snare, cymbals, bass, other).

Built-in stem mixer with solo & mute.

Alphabetical session browser — instant access even with 100-200 sessions.

Batch processing.

WAV / AIFF / AAC output.