Stable Audio 3 Medium Audio Outpainting

stable-audio-3-medium-audio-outpainting

Stable Audio 3 Medium audio outpainting is a 1.4 billion parameter latent diffusion model that extends existing stereo audio beyond its original endpoint via causal continuation guided by text prompts.

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Details

Accepts: audio

Pricing

Price: 5.58 cr / clip

Prices in credits (1 credit = $0.01).

Data schema

Input

Field	Type	Description
seed	—	Random seed for reproducible outputs. Omit for a random seed.
promptrequired	string	Text description guiding the extension content.
bitrate	string	Audio bitrate for compressed output formats (e.g., mp3, aac, opus). Format e.g. '192k' or '320k'. Ignored for lossless formats (wav, flac).
audio_urlrequired	string	Source audio to extend.
sync_mode	boolean	If True, the audio is returned inline as a data URI and the result is not saved to the request history.
output_format	stringenum: mp3, wav, flac, ogg, opus, m4a…	Container format for the generated audio output.
guidance_scale	number	Classifier-free guidance scale. Higher values follow the prompt more strictly. Only effective on base (non-distilled) checkpoints.
negative_prompt	string	Text description of qualities to avoid in the output.
num_inference_steps	integer	Number of sampling steps. Post-trained (distilled) checkpoints look good with the default 8 and gain little from going higher.
extend_seconds_after	number	Seconds of new audio to generate after the source audio.
enable_safety_checker	boolean	Enable NSFW content safety checking.
extend_seconds_before	number	Seconds of new audio to generate before the source audio.
enable_prompt_expansion	boolean	If True, the prompt will be expanded using an LLM for more detailed and higher quality results.

Output

Field	Type	Description
seed	integer	The random seed used for generation.
audio	—	The generated audio clip.
prompt	string	The prompt used for generation.