I built a free open-source Mac app for stem separation, YouTube import, and mix export
I’ve been building StemStudio as a local Mac app for the stem workflows I kept wanting myself: making instrumentals, keeping backing vocals, turning down one instrument, comparing different separation runs, and exporting a mix without sending files to a hosted service.
GitHub: https://github.com/Samuwhale/stemstudio
Release: https://github.com/Samuwhale/stemstudio/releases/tag/v0.1.0
License: AGPL-3.0
It supports local audio/video files and public YouTube URLs. After import, you can queue one song or a batch, pick stem settings, compare runs, adjust stem gain/mute, and export WAV, MP3, stems, source files, or bundles.
The app runs locally. It starts a bundled API and worker, and keeps the database, source files, stems, logs, and exports on your machine.
The first release is signed and notarized for Apple Silicon Macs.
This is still early, but it is usable now. I made it public because I think others would benefit from it, and because I do not have the time to maintain/finish this project on my own.
Hope you guys enjoy it!