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Pro Audio Stem Separator

· Last updated：2026-08-02

Separate a music mix into drums, bass, other, vocals, guitar, and piano, then download one ZIP.

Details

What this tool helps you do

Runs the local HT-Demucs 6-stem ONNX model on a bounded audio clip. The ZIP contains six encoded stems and manifest.json. Source separation is not lossless: bleed and artifacts can remain, so use the files as a production starting point rather than isolated originals.

Execution

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Samples

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Written by the Elysia Tools team

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Media
Input types
file, select
Output type
file
Sample coverage
4
API ready
Yes

Overview

Pro Audio Stem Separator uses the local HT-Demucs 6-stem ONNX model to split a music mix into drums, bass, other, vocals, guitar, and piano, then packages the encoded stems and manifest.json in one downloadable ZIP.

When to use

  • Separate vocals or instruments from a music mix for editing and remixing.
  • Create practice tracks by reducing the prominence of vocals, drums, bass, or other instruments.
  • Prepare a multitrack starting point from a bounded audio clip.

How it works

  1. 1Upload one music file up to the tool's 100 MB limit.
  2. 2Choose an output format: FLAC, WAV, MP3, M4A (AAC), or OGG Vorbis.
  3. 3The local HT-Demucs model separates the clip into six stems: drums, bass, other, vocals, guitar, and piano.
  4. 4Download a ZIP containing the six encoded stems and manifest.json.

Use cases

  • Music producers isolating vocals, drums, bass, guitar, or piano for remixing.
  • Musicians creating instrument-focused practice or rehearsal tracks.
  • Editors preparing separated audio elements for a short music project.

Examples

1. Prepare a remix starting point

Music producer

Background

A producer has a short stereo mix and wants separate vocals, drums, bass, guitar, piano, and other elements for a remix.

Problem

The original multitrack session is unavailable, so the mix needs to be separated into usable production stems.

How to use

Upload the music mix and select FLAC as the output format.

audioFile: music-mix.flac; outputFormat: flac

Outcome

The tool returns a ZIP with six FLAC stems and manifest.json for further editing.

2. Create an instrumental practice track

Musician

Background

A musician wants to practice along with a song while reducing the lead vocal presence.

Problem

Only a mixed audio file is available, without separate instrument or vocal tracks.

How to use

Upload the song and choose WAV for the separated outputs.

FAQ

Which stems does the tool create?

It creates drums, bass, other, vocals, guitar, and piano stems.

What audio formats can I choose for the stems?

You can choose FLAC, WAV, MP3, M4A (AAC), or OGG Vorbis.

What does the download contain?

The ZIP contains six encoded stems and a manifest.json file.

Is the separation lossless?

No. Bleed and audio artifacts can remain, so use the stems as a production starting point.

How large can the uploaded audio file be?

The uploaded file can be up to 100 MB.

Hub

Karaoke and Stem Separation Tools

Separate vocals and accompaniment, clean the resulting stems, set a controlled balance, and prepare a karaoke or remix-ready delivery.

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