ElevenLabs

Overview

This is ElevenLabs' sound effects generation model, accessible through the unified HiAPI.ai interface: input a text description and it directly produces an audio sound effect file. It excels at generating short, specific ambient sounds and Foley assets based on descriptions, with durations specifiable between 0.5 and 22 seconds, and an option to generate a seamlessly looping version. It is suited for game developers, short-video and podcast producers who need to fill in sound effect layers in bulk and in a controllable way, as well as application teams integrating sound effect generation into their own content pipelines.

Key Highlights

• Duration precisely specified by the caller — duration_seconds supports 0.5 to 22 seconds and is required; there is no automatic duration mode, so output length is predictable and easy to align to tracks.
• Quantifiable adjustment of prompt adherence — prompt_influence ranges from 0 to 1; lower values yield freer, more varied output, while higher values stay closer to the description, making it easy to switch between creative exploration and precise reproduction.
• Seamless looping sound effects — when the loop switch is enabled, the output is a smoothly loopable sound, eliminating post-production splicing and fade-in/fade-out processing.

Capabilities

Generate sound effects from text descriptions: Describe the sound in no more than 450 characters, and the model outputs the corresponding sound effect audio, ideal for quickly turning creative descriptions into usable sound assets.

Loop and duration control: Control the output form through the loop and duration_seconds parameters, directly producing audio suitable for in-game looping playback or fixed-timeline segments.

Generation randomness adjustment: prompt_influence controls how closely the output adheres to the description; the same description can be reproduced stably, or generated multiple times to pick different variations.

Use Cases

• Game developers filling in looping ambient sounds — Generate seamlessly loopable ambient audio using scene descriptions plus the loop switch, for level backgrounds and atmosphere setting.
• Short-video and podcast producers creating Foley — Set precise durations based on scene descriptions to obtain short sound effects such as transitions and actions, layering them directly onto the editing timeline.
• Application teams generating sound effect assets in bulk — Call the interface in bulk based on copy, writing the generated audio assets into an asset library or content production pipeline.

Limitations and Selection Advice

It outputs audio only, not visuals, images, or complete soundtracks; the single-call duration cap is 22 seconds, so long soundscapes need to be pieced together in segments; the description limit is 450 characters, and overly abstract text depends on the trade-offs after adjusting prompt_influence. For vocals, dialogue dubbing, or full musical melodies, use speech synthesis or music generation models instead; scenarios requiring long continuous background audio are also not suitable for direct use.