Open-sourced a cutdown version of the Android app for https://freemusicdemixer.com after removing it from the Play Store and deprecating it.
The app uses demucs.cpp to run the Demucs Hybrid-Transformer v4 (htdemucs) 4-source music source separation model to create an end-to-end Android app with Kotlin and C++ inference code in the native NDK.
App inputs:
- Audio file upload/selection intent (from phone storage, Google Drive, etc.)
- Record from microphone
- Capture audio from another app (e.g. YouTube Music)
App outputs:
- Stems (user chooses where to copy to disk)
- Custom mix (combine stems and playback, loop, export a custom mix)
Clone the repo, set up Android Studio, and load up this project. Not much else to it.
