# song extender

> Extend any song seamlessly with AI-powered voice cloning—lengthen tracks, add verses, and clone vocals in any style, all while preserving original tone and emotion, perfect for musicians and content creators.

## Overview

- **Model ID**: `song-extender`
- **Category**: voice cloning
- **Provider**: sonauto
- **Status**: model_ready
- **Screenshot**: `https://assets.modelslab.com/generations/59b1dbe9-dac8-4033-98c6-68df9b2ae66b.webp`

## API Information

This model can be used via our HTTP API. See the API documentation and usage examples below.

### Endpoint

- **URL**: `https://modelslab.com/api/v7/voice/song-extender`
- **Method**: POST

### Parameters

- **`init_audio`** (required): init audio
  - Type: file

- **`prompt`** (required): Prompt
  - Type: textarea

- **`model_id`** (optional): Model
  - Type: text

- **`extend_duration`** (required): This must be between 0 and 85.0 seconds.
  - Type: number

- **`side`** (optional): You can extend from the start or end of the song by setting the side to "left" or "right," respectively.
  - Type: select (options: right, left)

## Usage Examples

### cURL

```bash
curl --request POST \
  --url https://modelslab.com/api/v7/voice/song-extender \
  --header "Content-Type: application/json" \
  --data '{
    "key": "YOUR_API_KEY",
    "model_id": "song-extender",
    "init_audio": "https://assets.modelslab.com/generations/3b57f1c2-a63e-4285-90ea-5b8bad106217.ogg",
    "prompt": "Write another verse for my song",
    "extend_duration": "45.0",
    "side": "right"
  }'
```

### Python

```python
import requests

response = requests.post(
    "https://modelslab.com/api/v7/voice/song-extender",
    headers={
        "Content-Type": "application/json"
    },
    json={
        "key": "YOUR_API_KEY",
        "model_id": "song-extender",
        "init_audio": "https://assets.modelslab.com/generations/3b57f1c2-a63e-4285-90ea-5b8bad106217.ogg",
        "prompt": "Write another verse for my song",
        "extend_duration": "45.0",
        "side": "right"
    }
)

print(response.json())
```

### JavaScript

```javascript
fetch("https://modelslab.com/api/v7/voice/song-extender", {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "key": "YOUR_API_KEY",
    "model_id": "song-extender",
    "init_audio": "https://assets.modelslab.com/generations/3b57f1c2-a63e-4285-90ea-5b8bad106217.ogg",
    "prompt": "Write another verse for my song",
    "extend_duration": "45.0",
    "side": "right"
  })
})
.then(response => response.json())
.then(data => console.log(data));
```

## Links

- [Model Playground](https://modelslab.com/models/music-extend/song-extender)
- [API Documentation](https://docs.modelslab.com)
- [ModelsLab Platform](https://modelslab.com)