Nodaro DocsAudio Separation
Split any audio into vocals and instrumental, or into stems such as drums, bass, guitar and piano, with the Demucs model. Works on songs from any source.
The Audio Separation node splits any audio into its parts. In Vocal / Instrumental mode, it returns a clean vocal track and a music-only track. In Full stems mode, it returns vocals, drums, bass and other, and on the highest-quality model also guitar and piano. It runs Demucs, Meta's source-separation model, and accepts a song or a recording from any source, including commercially released recordings.
When to use it
- Take the instrumental backing track out of a finished song.
- Pull an acapella vocal for a remix or for lip sync.
- Split a track into stems to remix it.
- Isolate the drums or the bass to sample them.
For a clean voice alone, with no instrumental track, use Voice Extractor.
Quick start
Add the node
Press Tab on the canvas and choose Audio › Clean & Separate › Audio Separation.
Wire the audio
Wire an audio node into the Audio input: an upload, a generated track or the sound of a video.
Choose the mode
Open the settings panel. Keep Mode on Vocal / Instrumental for two tracks, or choose Full stems.
Run it
Click Run on the node. Each part appears on its own output, and the settings panel has a player for the vocal and instrumental tracks.
Input and outputs
| Input | Accepts | What it does |
|---|---|---|
| Audio | Audio nodes, such as Upload Audio, Reference Audio, Suno Create Music and Extract Audio | The audio to split. |
Each part has its own output, and each output carries one audio file.
| Mode | Outputs |
|---|---|
| Vocal / Instrumental | Vocals, Instrumental |
| Full stems | Vocals, Drums, Bass, Other, and Guitar and Piano on the Auto quality |
Outputs that the chosen mode and quality do not produce stay inactive. Wire each part from its own output. The node has no single Audio output. A connection that an older workflow made to that output is not moved to a part, so reconnect it to the part you want.
Settings
| Setting | What it does |
|---|---|
| Mode | Vocal / Instrumental (the default) returns two tracks. Full stems returns one track per instrument group. |
| Quality | Auto (the default) picks the best model for the mode, including the six-stem model with guitar and piano in Full stems mode. Fast uses the base model. Best (slower) uses a fine-tuned model that is about four times slower. |
Credits
The price is fixed per run, whatever the length of the audio. It depends on the mode and the quality, and Fast is the cheapest choice.
| Mode | Quality | Credits per run |
|---|---|---|
| Vocal / Instrumental | Auto or Fast | 33 |
| Vocal / Instrumental | Best (slower) | 88 |
| Full stems | Auto or Best (slower) | 66 |
| Full stems | Fast | 33 |
Tips
- Karaoke and acapella. Use Vocal / Instrumental mode: the Instrumental output is the backing track, and the Vocals output is the acapella.
- Guitar and piano. Use Full stems with Auto quality to get separate guitar and piano stems.
- Commercial songs. This is the node for commercially released songs. Suno Separate refuses them, or, with If Suno refuses, use Demucs on, hands them to Demucs at this node's price.
- Effects on one stem. Wire a single stem through Audio FX, then put the parts back together with Mix Audio.
From the API
POST /v1/audio-separation takes audioUrl, and the optional mode (vocal_instrumental or stems) and quality (auto, fast or best). The MCP tool is separate_audio. See Voice and media.
Frequently asked questions
Can Audio Separation split any song, or only songs made in Nodaro?
Any audio. It works on an uploaded song, a recording, the sound of a video or a generated track, including commercially released recordings, which Suno Separate refuses.
Which stems can I get?
In Vocal / Instrumental mode, a vocal track and an instrumental track. In Full stems mode, vocals, drums, bass and other, plus guitar and piano with the Auto quality.
Which quality should I choose?
Auto picks the best model for the mode and is the default. Fast is the quickest and cheapest. Best is a finer, fine-tuned model that is about four times slower and costs more.
How do I make a karaoke track?
Use Vocal / Instrumental mode and wire the Instrumental output onward. The Vocals output gives you the acapella.
Related
Voice Extractor
Suno Separate
Mix Audio
Audio FX
Last updated on
Voice Extractor
Remove background noise, music and other sounds from a recording and keep only the voice. Clean audio before transcription, lip sync, dubbing or a voice change.
Suno Separate
Split any audio with Suno into vocals and instrumental, into every stem, or into one named instrument and the song without it. Works on Suno tracks and uploads.