Ace Step

Ace Step

Playground

ACE-Step generates up to 4-minute music with lyrics from text and high acoustic fidelity; supports voice cloning, lyric edits, and remixing. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

Features

ACE-Step Text-to-Audio is a next-generation AI music generation model that composes complete songs — including vocals, instrumentals, and lyrics — directly from text descriptions. Produce professional-quality music up to 4 minutes long from simple style tags and optional lyrics.

Why It Stands Out

• Text-to-music generation: Transform style tags into coherent music tracks with melody, rhythm, and vocals.
• Style tag control: Enter multiple tags to guide genre, tempo, and energy.
• Vocal and lyric creation: Generates original vocals and synchronized lyrics that fit your prompt’s tone.
• Fine-grained acoustic fidelity: Maintains dynamic balance, spatial quality, and instrument clarity.
• Flexible duration: Adjustable from a few seconds to 4 minutes (240 seconds).
• Reproducibility: Use the seed parameter to recreate exact results.

Parameters

How to Use

1. Enter style tags — add genres and moods like “lofi, hiphop, chill, trap.”
2. Add lyrics (optional) — provide custom lyrics or leave blank for AI-generated ones.
3. Set duration — choose length from a few seconds up to 240 seconds (4 minutes).
4. Set a seed (optional) for reproducible results.
5. Click Run and wait for your music to generate.
6. Preview and download the result.

Best Use Cases

• Music Production & Songwriting — Generate complete demos or backing tracks instantly.
• Film, Game & Media Scoring — Create mood-specific tracks with precise control.
• Advertising & Content Creation — Design catchy audio for short-form content.
• Education & Experimentation — Teach structure, genre, or lyric composition.
• Soundtrack Prototyping — Preview musical direction before full studio production.

Pricing

Billing Rules

• Billed per second at $0.0002
• Maximum duration: 240 seconds (4 minutes)

Pro Tips for Best Quality

• Use multiple style tags to define genre, mood, and energy level.
• Combine contrasting tags (e.g., “chill, trap”) for unique blends.
• Provide structured lyrics with line breaks for better vocal synchronization.
• Start with shorter durations to test style combinations.
• Fix the seed when iterating to compare different tag or lyric variations.

Notes

• Processing time varies based on duration and current queue load.
• Please ensure your content complies with usage guidelines.

Authentication

For authentication details, please refer to the Authentication Guide.

API Endpoints

Submit Task & Query Result

set -euo pipefail

export WAVESPEED_API_KEY="your-api-key"

REQUEST_BODY=$(cat <<'JSON'
{
  "tags": "example",
  "duration": 60,
  "seed": -1
}
JSON
)

# 1. Submit the prediction.
SUBMIT_RESPONSE=$(curl --silent --show-error --fail-with-body \
  -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/ace-step" \
  -H "Authorization: Bearer ${WAVESPEED_API_KEY}" \
  -H "Content-Type: application/json" \
  -d "${REQUEST_BODY}")

TASK=$(printf '%s' "${SUBMIT_RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
PREDICTION_ID=$(printf '%s' "${TASK}" | jq -r '.id // empty')
if [ -z "${PREDICTION_ID}" ]; then
  printf 'Submission response did not contain a prediction id
' >&2
  exit 1
fi
RESULT_URL=$(printf '%s' "${TASK}" | jq -r '.urls.get // empty')
if [ -z "${RESULT_URL}" ]; then RESULT_URL="https://api.wavespeed.ai/api/v3/predictions/${PREDICTION_ID}/result"; fi

# 2. Poll until the prediction finishes.
while true; do
  RESPONSE=$(curl --silent --show-error --fail-with-body \
    "${RESULT_URL}" \
    -H "Authorization: Bearer ${WAVESPEED_API_KEY}")
  RESULT=$(printf '%s' "${RESPONSE}" | jq 'if type == "object" and has("data") then .data else . end')
  STATUS=$(printf '%s' "${RESULT}" | jq -r '.status // empty')

  case "${STATUS}" in
    completed) printf '%s\n' "${RESULT}" | jq '.outputs'; break ;;
    failed|cancelled|timeout) printf '%s\n' "${RESULT}" | jq . >&2; exit 1 ;;
    created|processing) sleep 2 ;;
    *) printf 'Unexpected status: %s
' "${STATUS}" >&2; exit 1 ;;
  esac
done

Parameters

Task Submission Parameters

Request Parameters

Response Parameters

Result Request Parameters

Result Response Parameters