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示例 1

Loopable ambient strings with warm synth pads.

Elevenlabs SFX V2 API – Text to SFX for AI Sound Effects

The Elevenlabs Sound Effect Model is a next-generation AI sound effect generator that transforms natural-language prompts into realistic and royalty-free AI Sound Effects. From cinematic braams and whooshes to ambient soundscapes and Foley details, it enables creators to produce unique audio without relying on static sound libraries.

In September 2025, ElevenLabs introduced Elevenlabs Sound Effect V2 (Elevenlabs SFX V2), the latest version of its model. This upgrade brought longer clip generation (up to 30 seconds), seamless looping, 48 kHz professional audio quality, and improved prompt adherence—features that significantly expand the possibilities for text to sound effect workflows.

The Elevenlabs Sound Effect V2 API (also referred to as Elevenlabs SFX V2 API) makes these advancements accessible to developers. At Kie.ai, we provide access to the Elevenlabs Sound Effect V2 API through a free testing playground (login required) and SDK integration options, allowing teams to experiment with text to SFX generation before scaling into production.

Introduction to Elevenlabs Sound Effect V2 API: Next-Generation AI Sound Effects

The Elevenlabs Sound Effect V2 API enables developers to generate custom AI sound effects directly from natural-language prompts. This text to sound effect approach makes it easy to build unique Foley sounds, impacts, or ambient textures without relying on static libraries.

Text to SFX with the Elevenlabs Sound Effect V2 API

With 48 kHz professional audio output in MP3 and WAV formats, the Elevenlabs SFX V2 API delivers sound effects that meet production standards. These high-quality results are ready for integration into games, films, podcasts, and interactive applications.

48 kHz Audio Quality in the Elevenlabs SFX V2 API

The Elevenlabs Sound Effect V2 API supports a loop parameter, enabling the creation of flawless, seamless loops. This feature is ideal for generating continuous ambience, VR/AR environments, and immersive game audio.

Seamless Looping Through the Elevenlabs Sound Effect V2 API

All sounds generated with the Elevenlabs Sound Effect V2 API are royalty-free AI sound effects, ensuring safe use in commercial projects. Combined with SDK support for JavaScript and Python, the API offers smooth integration for both small-scale prototypes and enterprise-level production pipelines.

Royalty-Free AI Sound Effects and Scalable API Integration

Key Features of  Elevenlabs Sound Effect V2 API

Building on earlier releases, the Elevenlabs Sound Effect V2 introduces refined audio quality, extended duration, and seamless looping for more reliable sound design workflows.


The Elevenlabs Sound Effect V2 API now supports clips up to 30 seconds long, compared to roughly 22 seconds in V1. This extended duration allows for richer ambience and more complex audio textures.


Extended Duration in the Elevenlabs Sound Effect V2 API

The Elevenlabs SFX V2 API has improved alignment with text to sound effect prompts, ensuring generated audio more closely matches the user’s intent.

Improved Prompt Adherence with the Elevenlabs SFX V2 API

The new loop parameter in the Elevenlabs Sound Effect V2 API makes it possible to create seamless, repeating sound effects—perfect for continuous backgrounds and interactive experiences.

Loop Parameter in the Elevenlabs Sound Effect V2 API

Upgraded to 48 kHz professional audio, the Elevenlabs Sound Effect V2 API delivers cleaner, sharper, and more detailed sound effects than V1, making them production-ready for commercial projects.

What’s New in the Elevenlabs SFX V2 API

To begin using the Elevenlabs Sound Effect V2 API, register a free account on Kie.ai and log in. Once inside the dashboard, you can generate your API key, which is required for secure authentication. You can also explore our login-required playground to test text to sound effect prompts before calling the API directly.

Step 1:Sign Up on Kie.ai and Get Your Elevenlabs Sound Effect V2 API Key

After obtaining your API key, you can access the free playground on Kie.ai to try the Elevenlabs SFX V2 API. Enter prompts, adjust duration or loop settings, and instantly preview generated AI sound effects. This free testing step helps you fine-tune text to SFX results before adding the API into your workflow.

Step 2:Try the Elevenlabs SFX V2 API Free in the Playground

After testing, start making authenticated calls to the Elevenlabs Sound Effect V2 API using your API key. Send text to SFX prompts and receive audio files for integration into your workflow.

Step 3:Make Calls to the Elevenlabs Sound Effect V2 API

Once you’re comfortable with the outputs, apply the Elevenlabs SFX V2 API to your real projects. The Elevenlabs Sound Effect V2 API is suitable for creating royalty-free AI sound effects for games, films, podcasts, and other commercial applications.

Step 4:Use the Elevenlabs SFX V2 API in Your Projects

How to Access the Elevenlabs Sound Effect V2 API on Kie.ai

The Elevenlabs Sound Effect V2 API performs best when prompts are concise and specific. Instead of writing “a sound in the forest with water and animals”, try “forest ambience with light rain and bird chirping”. Focused prompts guide the model to generate cleaner AI sound effects.

Keep Prompts Focused in the Elevenlabs Sound Effect V2 API

When working with the Elevenlabs SFX V2 API, include common sound design terms like whoosh, braam, impact, or ambience. These keywords improve the accuracy of text to sound effect outputs and help the API match industry-standard audio expectations.

Use Audio Terms in the Elevenlabs SFX V2 API

For Foley or short effects, keep duration settings low. For immersive soundscapes, extend to 20–30 seconds. The Elevenlabs Sound Effect V2 API adapts better when the duration aligns with the sound type, reducing noise and improving quality.

Match Duration to Your Use Case in the Elevenlabs Sound Effect V2 API

Don’t stop at the first output. Generate multiple variations with the Elevenlabs SFX V2 API and compare results. Iterating with small prompt changes—like adding “metallic” or “soft”—often produces a more polished sound.

Refine with Iteration in the Elevenlabs SFX V2 API

Tips for Getting the Best Results with the Elevenlabs Sound Effect V2 API

Developers use the Elevenlabs Sound Effect V2 API to create seamless loops, Foley effects, and ambient audio, generating immersive game environments with reliable text to SFX outputs.

Game Development with the Elevenlabs Sound Effect V2 API

The Elevenlabs SFX V2 API produces cinematic braams, impacts, and atmospheric layers, giving filmmakers high-quality AI sound effects that enhance storytelling and emotional depth in trailers or short films.

Film and Trailer Sound Design Using the Elevenlabs SFX V2 API

Podcasters and creators leverage the Elevenlabs Sound Effect V2 API for royalty-free background ambience and transitions, speeding up editing workflows and ensuring professional text to sound effect quality for online content.

Podcasts and YouTube Content with the Elevenlabs Sound Effect V2 API

Using the Elevenlabs SFX V2 API, developers build continuous 48 kHz loops and immersive ambiences, producing realistic spatial AI sound effects that heighten interactivity and presence in VR and AR applications.

VR/AR Experiences Powered by the Elevenlabs SFX V2 API

Real-World Applications of Elevenlabs SFX V2 API

FAQs About Kie.ai's Elevenlabs Sound Effect V2 API

Kie.ai delivers cost-effective access to the Elevenlabs SFX V2 API. Generate royalty-free AI sound effects from text prompts with 48 kHz quality, seamless loops, and pricing designed for scalability.