Sattari Studio lab

Split Alpha

One track. Every part. Separate vocals, drums, bass and instruments, then make the mix yours.

Runs on your device. No uploads.

Choose your starting point

Add a song

WAV, MP3, FLAC, M4A, OGG · one song · up to 10 min

Model: HTDemucs by Meta (MIT License), ONNX conversion by demucs-web (MIT), fetched from Hugging Face at a pinned revision and SHA-256 checked before use. Credits and licenses

Alpha: what it does not do yet

Quality is HTDemucs-class, not studio grade: expect some bleed between stems and artifacts on dense mixes.
"Instruments" is everything that is not vocals, drums or bass (guitars, keys, synths together).
First run downloads a 172 MB model from Hugging Face (cached afterwards). Desktop Chrome/Edge with WebGPU is fastest; CPU mode can take several minutes per song.
One song at a time, up to 10 minutes and 100 MB. Phones and tablets are untested.
Use it on your own tracks or for practice; you are responsible for having the rights to what you separate.
Sessions are saved only in this browser when storage is available. Use one Split tab at a time. Sessions remain until you replace the song or clear browser site data; storage quota or eviction can prevent recovery, so download important WAVs as a backup.