ACE-Step 1.5
ACE-Step 1.5 costs $0.0012/track on FairStack — a generate model for Original music creation, Background music with custom lyrics, Creative music 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 ACE-Step 1.5?
ACE-Step 1.5 is FairStack's self-hosted music generation model that creates full songs with vocals and lyrics, supporting fine-grained control over musical parameters including BPM, key signature, time signature, and vocal language. Self-hosting eliminates third-party API costs and provides complete creative control over the generation process. The model generates both instrumental and vocal tracks, with support for multiple genres and detailed musical specification. Users can set exact BPM, musical key, and time signature, giving precise control that text-prompt-only models do not offer. Vocal language options enable production in multiple languages. Compared to cloud-based music generation services like Suno at $0.10 per song, self-hosted ACE-Step provides cost advantages for high-volume production. Against Mureka at $0.03 per song, ACE-Step offers more granular parameter control. Generation can take 30-60+ seconds for full songs, reflecting the computational demands of detailed music synthesis. Best suited for original music creation, background music with custom lyrics, and creative music experimentation where granular parameter control and self-hosted privacy matter. Available on FairStack at infrastructure cost plus a 20% platform fee.
Key Features
What are ACE-Step 1.5's strengths?
What are ACE-Step 1.5's limitations?
What is ACE-Step 1.5 best for?
How much does ACE-Step 1.5 cost?
Example Outputs
Generated with ACE-Step 1.5 on FairStack
Ambient electronic music with ethereal pads, gentle arpeggios, and nature sounds, perfect for meditation
Uplifting indie folk with acoustic guitar fingerpicking, warm harmonies, and soft tambourine, campfire sing-along
How do I use the ACE-Step 1.5 API?
curl -X POST https://api.fairstack.ai/v1/generations/music \
-H "Authorization: Bearer $FAIRSTACK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "ace-step-1.5",
"prompt": "Ambient electronic music with ethereal pads, gentle arpeggios, and nature sounds, perfect for meditation"
}'import requests
response = requests.post(
"https://api.fairstack.ai/v1/generations/music",
headers={
"Authorization": f"Bearer {FAIRSTACK_API_KEY}",
"Content-Type": "application/json",
},
json={
"model": "ace-step-1.5",
"prompt": "Ambient electronic music with ethereal pads, gentle arpeggios, and nature sounds, perfect for meditation",
},
)
result = response.json()
print(result["url"])const response = await fetch(
"https://api.fairstack.ai/v1/generations/music",
{
method: "POST",
headers: {
Authorization: `Bearer ${process.env.FAIRSTACK_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "ace-step-1.5",
prompt: "Ambient electronic music with ethereal pads, gentle arpeggios, and nature sounds, perfect for meditation",
}),
}
);
const result = await response.json();
console.log(result.url);What parameters does ACE-Step 1.5 support?
Frequently Asked Questions
How much does ACE-Step 1.5 cost?
ACE-Step 1.5 costs $0.0012/track 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 ACE-Step 1.5 and what is it best for?
ACE-Step 1.5 is FairStack's self-hosted music generation model that creates full songs with vocals and lyrics, supporting fine-grained control over musical parameters including BPM, key signature, time signature, and vocal language. Self-hosting eliminates third-party API costs and provides complete creative control over the generation process. The model generates both instrumental and vocal tracks, with support for multiple genres and detailed musical specification. Users can set exact BPM, musical key, and time signature, giving precise control that text-prompt-only models do not offer. Vocal language options enable production in multiple languages. Compared to cloud-based music generation services like Suno at $0.10 per song, self-hosted ACE-Step provides cost advantages for high-volume production. Against Mureka at $0.03 per song, ACE-Step offers more granular parameter control. Generation can take 30-60+ seconds for full songs, reflecting the computational demands of detailed music synthesis. Best suited for original music creation, background music with custom lyrics, and creative music experimentation where granular parameter control and self-hosted privacy matter. Available on FairStack at infrastructure cost plus a 20% platform fee. ACE-Step 1.5 is best for Original music creation, Background music with custom lyrics, Creative music experimentation. Available via FairStack's REST API with curl, Python, and Node.js SDKs.
Does ACE-Step 1.5 have an API?
Yes. ACE-Step 1.5 is available via FairStack's REST API at api.fairstack.ai. Send a POST request to /v1/generations/music with your API key and prompt. Works with curl, Python requests, Node.js fetch, and any HTTP client. No SDK installation required.
How does ACE-Step 1.5 compare to other music models?
ACE-Step 1.5 excels at Original music creation, Background music with custom lyrics, Creative music experimentation. It is a generate model priced at $0.0012/track on FairStack. Key strengths: Self-hosted for privacy, Full creative control (BPM, key, time signature). Compare all music models at fairstack.ai/models.
What makes ACE-Step 1.5 stand out for music generation?
ACE-Step 1.5 excels with self-hosted for privacy and full creative control (bpm, key, time signature).
What are the known limitations of ACE-Step 1.5?
Key limitations include: generation can take 30-60+ seconds; quality varies by genre. FairStack documents these transparently so you can choose the right model for your workflow.
What music generation features does ACE-Step 1.5 offer?
ACE-Step 1.5 offers: full song generation with vocals; lyrics support; bpm and key control; multiple vocal languages. All capabilities are accessible through both the FairStack web interface and REST API.