# Audio 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.

Source: https://nodaro.ai/docs/nodes/audio/audio-separation

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.

- Found in: Audio › Clean & Separate
- Output: audio
- API type: `audio-separation`

## 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](https://nodaro.ai/docs/nodes/audio/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.

Workflow: A song is split, the vocals get a hall reverb, and the two parts are mixed back together.

- Upload Audio → Audio Separation (audio)
- Audio Separation → Audio FX (vocals)
- Audio FX → Mix Audio (audio)
- Audio Separation → Mix Audio (instrumental)

## 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. The node's main result is the vocal track.

## 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 quality, and **Fast** is the cheapest choice.

## 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.
- **Songs from anywhere.** This is the node for songs that were not made with Suno. [Suno Separate](https://nodaro.ai/docs/nodes/audio/suno-separate) refuses them.
- **Effects on one stem.** Wire a single stem through [Audio FX](https://nodaro.ai/docs/nodes/audio/audio-fx), then put the parts back together with [Mix Audio](https://nodaro.ai/docs/nodes/audio/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](https://nodaro.ai/docs/developers/api/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. Suno Separate, by contrast, only accepts tracks made with Suno.

### 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.