--- title: Song Extender API | Music Generation | ModelsLab description: Extend any song seamlessly with AI-powered voice cloning—lengthen tracks, add verses, and clone vocals in any style, all while preserving original tone. url: https://modelslab.com/models/sonauto/music-extend.md canonical: https://modelslab.com/models/sonauto/music-extend type: product component: Playground/Endpoint/Index generated_at: 2026-10-16T11:24:57.505864Z --- [![song extender thumbnail](https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcR3bH50Z32TQWulZDd8mI74YltezfzYLSZMxg&s)](https://modelslab.com/models/sonauto)Song Extender --- [by Sonauto](https://modelslab.com/models/sonauto)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. `song-extender` Closed Source Model [LLMs.txt](https://modelslab.com/models/sonauto/song-extender/llms.txt) [Learn more](https://modelslab.com/song-extender) [API Playground](/models/sonauto/music-extend)API DocumentationVibe CodeRelated ModelsDeveloper SupportModel Specs Input --- Audio Upload File preview or record audio Record Audio Prompt Write another verse for my song Extend duration Advanced Settings Customize your input with more control. **$0.08** per generation Login to Generate Output --- Idle Unknown content type Looking for something different? --- Models that trade off differently against the one you are viewing ### Better quality Newer flagship models that generally produce stronger results. 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Get your API key from the [pricing page](https://modelslab.com/pricing) to get started. PythonJavaScriptcURLPHP ``` import requests import json url = "https://modelslab.com/api/v7/voice/song-extender" headers = { "Content-Type": "application/json" } data = { "model_id": "song-extender", "prompt": "your prompt here", "key": "YOUR_API_KEY" } try: response = requests.post(url, headers=headers, json=data) response.raise_for_status() # Raises an HTTPError for bad responses (4XX or 5XX) result = response.json() print("API Response:") print(json.dumps(result, indent=2)) except requests.exceptions.HTTPError as http_err: print(f"HTTP error occurred: {http_err} - {response.text}") except Exception as err: print(f"Other error occurred: {err}") ``` ### Pricing Song Extender API costs $0.08 per generation. Plans start at $21/month, and open-source models are unlimited on the $149/month plan. [View pricing plans](https://modelslab.com/pricing) ### Use Cases - Voice-over production for video content - Podcast and audiobook narration - Multilingual customer support automation - Interactive voice response (IVR) systems [Learn more about Song Extender](https://modelslab.com/song-extender) [Browse Audio Models](https://modelslab.com/models?feature=audiogen) [More from Sonauto](https://modelslab.com/models/sonauto) [View Pricing](https://modelslab.com/pricing) Song Extender FAQ --- ### What is 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. ### How do I use the Song Extender API? You can integrate Song Extender into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "song-extender" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### How much does Song Extender cost? Song Extender costs $0.08 per generation. ModelsLab plans start at $21/month (Basic), and the $149/month Open Source plan includes unlimited generation on open-source models. ### What is the Song Extender model ID? The model ID for Song Extender is "song-extender". Use this ID in your API requests to specify this model. ### Do I need a paid plan to use Song Extender? Yes. ModelsLab is subscription-based with no free tier — plans start at $21/month (Basic, 3,250 API calls). The $149/month Open Source Unlimited plan includes unlimited generation across open-source models; premium third-party models are billed per call from your wallet. --- *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) --- *Generated by ModelsLab - 2026-10-16*