---
title: Song Extender — AI Voice Cloning | ModelsLab
description: Extend songs with Song Extender AI voice cloning. Upload audio, generate seamless continuations via song extender API. Try now.
url: https://modelslab.com/song-extender
canonical: https://modelslab.com/song-extender
type: website
component: Seo/ModelPage
generated_at: 2026-04-26T20:40:10.634131Z
---

Available now on ModelsLab · Voice & Audio

Song Extender
Extend Songs Seamlessly
---

[Try Song Extender](/models/sonauto/song-extender) [API Documentation](https://docs.modelslab.com)

Sample output

Clone Voices. Extend Tracks.
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Voice Cloning

### Match Original Vocals

Analyzes input audio to clone voice and extend song in matching style.

API Ready

### Song Extender API

Integrate song extender model into apps for automated music extension.

Seamless Output

### Natural Continuations

Generates extensions preserving tempo, key, and mood up to 8 minutes.

Examples

See what Song Extender can create
---

Copy any prompt below and try it yourself in the [playground](/models/sonauto/song-extender).

Jazz Solo

“Extend this smooth jazz instrumental from 1:30, add saxophone solo in same key and tempo, maintain lounge mood, generate 2 minute continuation with fading reverb.”

Acoustic Folk

“Continue acoustic guitar folk track starting at chorus end, clone warm male vocal, add harmony layers, extend by 90 seconds with building crescendo.”

Electronic Beat

“Extend electronic synthwave from drop at 45 seconds, preserve pulsing bassline, clone robotic vocal chops, add 2 minute bridge with rising arpeggios.”

Piano Ballad

“From piano ballad outro at 2:00, clone emotive female voice for new verse, match melancholic tone, extend 1.5 minutes with string swells.”

For Developers

A few lines of code.
Extend song. One call.
---

ModelsLab handles the infrastructure: fast inference, auto-scaling, and a developer-friendly API. No GPU management needed.

- **Serverless:** scales to zero, scales to millions
- **Pay per second,** no minimums
- **Python and JavaScript SDKs,** plus REST API

[API Documentation ](https://docs.modelslab.com)

PythonJavaScriptcURL

Copy

```
<code>import requests

response = requests.post(
    "https://modelslab.com/api/v7/voice/song-extender",
    json={
  "key": "YOUR_API_KEY",
  "prompt": "Write another verse for my song",
  "init_audio": "https://assets.modelslab.ai/generations/3b57f1c2-a63e-4285-90ea-5b8bad106217.ogg",
  "extend_duration": "45.0"
}
)
print(response.json())</code>
```

FAQ

Common questions about Song Extender
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[Read the docs ](https://docs.modelslab.com)

### What is song extender AI?

Song extender AI generates continuations for uploaded audio tracks. It clones voice and matches style for seamless extensions. Supports up to 8 minutes total length.

### How does ai song extender online work?

Upload audio, select start point and parameters. AI analyzes and creates natural extensions. Preview and download via web or API.

### Is there a song extender API?

Yes, song extender API enables programmatic access. Send audio files and get extended tracks in response. Ideal for app integration.

### What is song extender voice cloning?

Clones vocals from input to extend songs authentically. Maintains timbre and pitch in new sections. Works across genres.

### Best song extender alternative?

Song extender model offers voice cloning focus unlike pattern-rearranging tools. Provides generative extensions via API. Free tier available.

### Song extender online free?

Basic usage free with limits. API requires credits for production. No signup for playground tests.

Ready to create?
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Start generating with Song Extender on ModelsLab.

[Try Song Extender](/models/sonauto/song-extender) [API Documentation](https://docs.modelslab.com)

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*This markdown version is optimized for AI agents and LLMs.*

**Links:**
- [Website](https://modelslab.com)
- [API Documentation](https://docs.modelslab.com)
- [Blog](https://modelslab.com/blog)

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*Generated by ModelsLab - 2026-04-27*