Stable Audio Open
Stable Audio Open costs $0.012/req on FairStack — a sound effects model for Free audio generation, Background audio, Experimentation. No subscription required. Pay per generation with full REST API access. FairStack applies a transparent 20% margin on infrastructure cost so you always see the real price.
What is Stable Audio Open?
Stable Audio Open is a free, open-source audio generation model from Stability AI. It generates background audio, ambient sounds, and simple musical passages at zero cost per generation, making it the only completely free audio option in the catalog. Fast processing ensures quick turnaround for experimentation and prototyping. The model handles basic text-to-audio prompts including ambient environments, simple sound effects, and rudimentary musical textures. Its open-source architecture means full transparency and the ability to run on private infrastructure. For teams exploring audio generation without budget commitment, it provides a functional starting point. Compared to ElevenLabs Sound Effects V2 which delivers higher quality at $0.0012 per second, Stable Audio trades output quality for zero cost. Against Suno or Mureka for music generation, Stable Audio produces simpler, less polished output but removes all financial barriers. The model is best understood as a free exploration tool rather than a production-quality generator. Best suited for audio generation experimentation, rapid prototyping, background ambient audio for draft projects, and any workflow where zero cost is the primary requirement. Available on FairStack at infrastructure cost plus a 20% platform fee, which in this case means no cost at all.
Key Features
What are Stable Audio Open's strengths?
What are Stable Audio Open's limitations?
What is Stable Audio Open best for?
How much does Stable Audio Open cost?
How does Stable Audio Open perform across capabilities?
Example Outputs
Generated with Stable Audio Open on FairStack
Epic trailer music with deep bass drops, dramatic percussion, and soaring synthesizers
Gentle rain on a tin roof with distant thunder, crickets chirping, and a soft wind through trees
How do I use the Stable Audio Open API?
curl -X POST https://api.fairstack.ai/v1/generations/voice \
-H "Authorization: Bearer $FAIRSTACK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "stable-audio",
"prompt": "Epic trailer music with deep bass drops, dramatic percussion, and soaring synthesizers"
}'import requests
response = requests.post(
"https://api.fairstack.ai/v1/generations/voice",
headers={
"Authorization": f"Bearer {FAIRSTACK_API_KEY}",
"Content-Type": "application/json",
},
json={
"model": "stable-audio",
"prompt": "Epic trailer music with deep bass drops, dramatic percussion, and soaring synthesizers",
},
)
result = response.json()
print(result["url"])const response = await fetch(
"https://api.fairstack.ai/v1/generations/voice",
{
method: "POST",
headers: {
Authorization: `Bearer ${process.env.FAIRSTACK_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "stable-audio",
prompt: "Epic trailer music with deep bass drops, dramatic percussion, and soaring synthesizers",
}),
}
);
const result = await response.json();
console.log(result.url);Frequently Asked Questions
How much does Stable Audio Open cost?
Stable Audio Open costs $0.012/req on FairStack as of 2026-05-13. This price includes FairStack's transparent 20% margin on infrastructure cost. No subscription or monthly fee — you pay per generation only. Minimum deposit is $1.
What is Stable Audio Open and what is it best for?
Stable Audio Open is a free, open-source audio generation model from Stability AI. It generates background audio, ambient sounds, and simple musical passages at zero cost per generation, making it the only completely free audio option in the catalog. Fast processing ensures quick turnaround for experimentation and prototyping. The model handles basic text-to-audio prompts including ambient environments, simple sound effects, and rudimentary musical textures. Its open-source architecture means full transparency and the ability to run on private infrastructure. For teams exploring audio generation without budget commitment, it provides a functional starting point. Compared to ElevenLabs Sound Effects V2 which delivers higher quality at $0.0012 per second, Stable Audio trades output quality for zero cost. Against Suno or Mureka for music generation, Stable Audio produces simpler, less polished output but removes all financial barriers. The model is best understood as a free exploration tool rather than a production-quality generator. Best suited for audio generation experimentation, rapid prototyping, background ambient audio for draft projects, and any workflow where zero cost is the primary requirement. Available on FairStack at infrastructure cost plus a 20% platform fee, which in this case means no cost at all. Stable Audio Open is best for Free audio generation, Background audio, Experimentation. Available via FairStack's REST API with curl, Python, and Node.js SDKs.
Does Stable Audio Open have an API?
Yes. Stable Audio Open is available via FairStack's REST API at api.fairstack.ai. Send a POST request to /v1/generations/voice with your API key and prompt. Works with curl, Python requests, Node.js fetch, and any HTTP client. No SDK installation required.
How does Stable Audio Open compare to other voice models?
Stable Audio Open excels at Free audio generation, Background audio, Experimentation. It is a sound effects model priced at $0.012/req on FairStack. Key strengths: FREE — no cost at all, Open-source. Compare all voice models at fairstack.ai/models.
What makes Stable Audio Open stand out for music generation?
Stable Audio Open excels with free — no cost at all and open-source. Generation typically completes in under 5 seconds.
What are the known limitations of Stable Audio Open?
Key limitations include: lower quality than commercial options; less control and variety; limited prompt adherence. FairStack documents these transparently so you can choose the right model for your workflow.
How fast is Stable Audio Open?
Stable Audio Open typically completes in under 5 seconds. This makes it suitable for real-time applications, interactive workflows, and high-volume batch processing.
What music generation features does Stable Audio Open offer?
Stable Audio Open offers: completely free; open-source model; fast generation; text-to-audio capability. All capabilities are accessible through both the FairStack web interface and REST API.