Ace Step 1.5

Ace Step 1.5

Playground

ACE-Step 1.5 generates up to 4-minute music with lyrics from text. Supports 50+ languages, high acoustic fidelity, and runs efficiently on consumer hardware. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

ACE Step 1.5

ACE Step 1.5 is an ultra-affordable AI music generation model that creates songs from style tags and lyrics. With support for up to 4-minute tracks and flexible duration control, it delivers quality music at an extremely low cost.

Why Choose This?

• Ultra-low cost Generate music at a fraction of a cent per second.

• Long-form generation Create tracks up to 240 seconds (4 minutes) in length.

• Flexible duration Precise control over output length with a slider.

• Tag-based styling Use comma-separated tags to define genre, instruments, and mood.

• Structured lyrics Support for [Verse], [Chorus], [Bridge] and other section markers.

Parameters

Tags Format

Use comma-separated values to describe the musical style:

Examples:

steampunk, electro swing, jazz, piano, ticking clock

pop, female vocals, upbeat, guitar, 120bpm

lo-fi, chill, ambient, piano, rainy mood

Lyrics Format

Use structure markers in brackets to guide song arrangement:

[Verse] Ticking tocking goes the clock Turning keys and pick the lock Steam is rising, gears go round Listen to that brassy sound

[Chorus] Round and round we go today In this smoky cabaret Fix the future, fix the past

How to Use

1. Enter your tags — describe the musical style with comma-separated tags.
2. Write your lyrics (optional) — add structured lyrics with section markers.
3. Set duration — choose track length up to 240 seconds.
4. Set seed (optional) — use a specific seed for reproducible results.
5. Run — submit and download your generated music.

Pricing

Best Use Cases

• Background Music — Generate affordable background tracks for videos and content.
• Demo Production — Quickly prototype song ideas at minimal cost.
• Bulk Generation — Produce large volumes of music cost-effectively.
• Content Creation — Custom music for social media, podcasts, and games.
• Experimentation — Explore styles and ideas without worrying about cost.

Pro Tips

• Combine multiple style tags for more specific results.
• Use structure markers in lyrics for well-arranged songs.
• Generate longer tracks (240s) for full-length background music.
• Leave lyrics empty for instrumental-only tracks.
• Use the same seed to reproduce identical results.
• Experiment freely — each minute costs less than $0.02.

Notes

• Tags is the only required field.
• Maximum track duration is 240 seconds (4 minutes).
• Without lyrics, the model generates instrumental music.
• Seed value -1 generates a random seed each time.

Related Models

• HeartMuLa Generate Music — Generate songs with multilingual lyrics support.
• ElevenLabs Music — Premium music generation with multiple output formats.

# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/ace-step-1.5" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
    "lyrics": "",
    "duration": 60,
    "seed": -1
}'

# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"