u/fotsbeats

Been working on this for about 6 months (previously Custom Stem Injector) and am ready for public testing.

Have updated the beta to run natively on Apple Silicon via MLX. Its bundled with some of the leading community separation models and allows building custom Serato .stems files for playback of extracted stems (or your own studio stems) in Serato DJ.

This is currently for macOS on M1+ only for now. I will probably never make the separation models run on Intel/Windows as there are other solutions for that, but will we working on the custom stem building function on those platforms.

Let me know how its goes!

EDIT: Finished Quality/Speed selection and added a model in v0.4 on Github

• Added PolarFormer 62 as a selectable vocal model, positioned below Leap and above FT3.
• PolarFormer runs a tested batch-1 MLX profile with PoPE positional embeddings. On the M4 Pro test machine it processed at near Leap XE quality with lower processing time.
• Balanced (default): the selected vocal model (Leap XE defaults) handles Vocal. Kim Inst V1E handles Instrumental-only work; when Drums/Bass/Melody are requested, BS-RoFormer-SW runs directly on the full song and supplies the component stems and summed Instrumental.
• Highest: the selected vocal model handles Vocal, Kim Inst V1E handles Instrumental, and BS-RoFormer-SW splits Kim’s instrumental when Drums/Bass/Melody are requested.
• Fast: one direct BS-RoFormer-SW pass supplies every selected output; Instrumental is the sum of its non-vocal stems.