StemForge

6.9easy start · #11 of 22
in AI Music Remixing Tools

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, self-hosted, Web, Windows.

StemForge is ranked #11 of 22 in AI music remixing tools on The Geeks Club. It runs on Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

StemForge plans and pricing

All plans

StemForge Free No subscriptions or per-track fees Open-source; runs locally on your hardware github.com · 4 Oct 2026

Compared on AI music remixing tools

Remix workflow: both
Export formats: wav, flac, mp3, ogg

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The record

Product: StemForge is an open-source, GPU-accelerated audio workstation for stem separation, MIDI extraction, audio generation, and song composition that runs locally in a browser.
Privacy: The project says audio stays on the user's computer and no internet connection is required after initial model downloads.
Stem separation: Demucs and BS-Roformer separate audio into vocal, drum, bass, other, guitar, and piano stems, with automatic engine and model recommendations based on spectral analysis.
MIDI: StemForge extracts MIDI from instrument stems with BasicPitch and vocal melodies with faster-whisper and pitch tracking, and can send MIDI to hardware synths through Web MIDI.
Audio generation: The Synth tab uses Stable Audio Open for text-conditioned audio generation up to 600 seconds, with optional audio or MIDI conditioning.
Song composition and voice conversion: The Compose tab uses AceStep for song generation and RVC for voice conversion, with 14 built-in voices and a HuggingFace model browser.
Mixing and export: The Mix tab combines audio stems, MIDI-rendered tracks, synth outputs, and composed songs; exports support WAV, FLAC, MP3, and OGG, individually or as a ZIP archive.
Integrations: The documented workflow connects Separate, MIDI, Synth, Compose, Mix, and Export tabs so outputs can flow between pipelines; MIDI Out connects to hardware synths via the browser's Web MIDI API.
Platforms: The project documents Linux and macOS support, Windows use through WSL, and access through a web browser; Apple Silicon uses MPS, while AMD GPU support via ROCm is untested on real hardware.
Requirements and limits: The documented setup requires Python 3.12, FFmpeg, and FluidSynth with a GM soundfont; NVIDIA GPU acceleration requires driver 580 or newer, while CPU-only operation is significantly slower.
Model downloads: Models download lazily on first use; the Compose tab's AceStep models require about 20 GB, and the Stable Audio Open model requires HuggingFace license acceptance and authentication.
MIDI browser support: MIDI Out requires Chrome or Edge and a secure browser context; the project documents HTTPS or localhost as supported secure origins.
Price from: Free

Where it ranks on The Geeks Club

Best AI Music Remixing Tools in 2026#11 of 22

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Sources

github.com/tsondo/StemForge· checked 4 Oct 2026