live
MODEL IDrunware:ace-step@v1.5-xl-turbo

ACE-Step v1.5 XL Turbo

ACE-Step v1.5 XL Turbo is the accelerated 4B DiT variant of ACE-Step 1.5. It is optimized for faster music generation with 8-step distilled inference while retaining the higher-capacity XL architecture. It supports text-to-music, cover generation, and repaint workflows, making it suitable for rapid iteration when the 2B turbo model is not enough in audio quality.

ACE-Step v1.5 XL Turbo

text-to-audio

Forensic Pollen E-Learning Song$0.0009~12s
0:00
Try in Playground
import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:ace-step@v1.5-xl-turbo',
  positivePrompt: 'Complete educational micro-song for a forensic science e-learning module about palynology. Warm, precise 1960s bossa nova with nylon-string guitar, brushed drum kit, upright bass, soft vibraphone, and brief clarinet responses. Calm, curious, academically credible mood rather than comic or childish. Clear English alto lead vocal with lightly spoken, highly intelligible verses and a memorable sung chorus; restrained backing harmonies only in the final chorus. Open with a two-bar guitar-and-vibraphone motif, move quickly through verse and chorus, add a short clarinet turnaround before verse two, then finish with a resolved final chorus and clean instrumental button. Keep the vocal forward in the mix and every technical term easy to understand. No sound effects, crowd noise, cinematic impacts, or long instrumental solo.',
  duration: 60,
  settings: {
    lyrics: '[Verse 1]\nPollen rides on fabric, soil, and air,\nA microscopic trace collected with care.\nShape, pores, and surface patterns help reveal\nWhich plant left the grain upon the seal.\n\n[Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nOne grain suggests; a group can show\nThe plants and places evidence may know.\n\n[Verse 2]\nUse sterile tools and package items dry,\nLabel every sample: where, when, and why.\nReference slides and seasonal records guide,\nBut context keeps conclusions qualified.\n\n[Final Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nDocument the chain, let findings stay\nMeasured, repeatable, and clear all the way.',
    bpm: 118,
    keyScale: 'C minor',
    timeSignature: 4,
    vocalLanguage: 'en'
  }
})
import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:ace-step@v1.5-xl-turbo",
            "positivePrompt": "Complete educational micro-song for a forensic science e-learning module about palynology. Warm, precise 1960s bossa nova with nylon-string guitar, brushed drum kit, upright bass, soft vibraphone, and brief clarinet responses. Calm, curious, academically credible mood rather than comic or childish. Clear English alto lead vocal with lightly spoken, highly intelligible verses and a memorable sung chorus; restrained backing harmonies only in the final chorus. Open with a two-bar guitar-and-vibraphone motif, move quickly through verse and chorus, add a short clarinet turnaround before verse two, then finish with a resolved final chorus and clean instrumental button. Keep the vocal forward in the mix and every technical term easy to understand. No sound effects, crowd noise, cinematic impacts, or long instrumental solo.",
            "duration": 60,
            "settings": {
                "lyrics": "[Verse 1]\nPollen rides on fabric, soil, and air,\nA microscopic trace collected with care.\nShape, pores, and surface patterns help reveal\nWhich plant left the grain upon the seal.\n\n[Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nOne grain suggests; a group can show\nThe plants and places evidence may know.\n\n[Verse 2]\nUse sterile tools and package items dry,\nLabel every sample: where, when, and why.\nReference slides and seasonal records guide,\nBut context keeps conclusions qualified.\n\n[Final Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nDocument the chain, let findings stay\nMeasured, repeatable, and clear all the way.",
                "bpm": 118,
                "keyScale": "C minor",
                "timeSignature": 4,
                "vocalLanguage": "en"
            }
        })


asyncio.run(main())
curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "audioInference",
      "taskUUID": "8edeea6f-6cbb-424c-b5cd-3024b5fb88f1",
      "model": "runware:ace-step@v1.5-xl-turbo",
      "positivePrompt": "Complete educational micro-song for a forensic science e-learning module about palynology. Warm, precise 1960s bossa nova with nylon-string guitar, brushed drum kit, upright bass, soft vibraphone, and brief clarinet responses. Calm, curious, academically credible mood rather than comic or childish. Clear English alto lead vocal with lightly spoken, highly intelligible verses and a memorable sung chorus; restrained backing harmonies only in the final chorus. Open with a two-bar guitar-and-vibraphone motif, move quickly through verse and chorus, add a short clarinet turnaround before verse two, then finish with a resolved final chorus and clean instrumental button. Keep the vocal forward in the mix and every technical term easy to understand. No sound effects, crowd noise, cinematic impacts, or long instrumental solo.",
      "duration": 60,
      "settings": {
        "lyrics": "[Verse 1]\nPollen rides on fabric, soil, and air,\nA microscopic trace collected with care.\nShape, pores, and surface patterns help reveal\nWhich plant left the grain upon the seal.\n\n[Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nOne grain suggests; a group can show\nThe plants and places evidence may know.\n\n[Verse 2]\nUse sterile tools and package items dry,\nLabel every sample: where, when, and why.\nReference slides and seasonal records guide,\nBut context keeps conclusions qualified.\n\n[Final Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nDocument the chain, let findings stay\nMeasured, repeatable, and clear all the way.",
        "bpm": 118,
        "keyScale": "C minor",
        "timeSignature": 4,
        "vocalLanguage": "en"
      }
    }
  ]'
runware run runware:ace-step@v1.5-xl-turbo \
  positivePrompt="Complete educational micro-song for a forensic science e-learning module about palynology. Warm, precise 1960s bossa nova with nylon-string guitar, brushed drum kit, upright bass, soft vibraphone, and brief clarinet responses. Calm, curious, academically credible mood rather than comic or childish. Clear English alto lead vocal with lightly spoken, highly intelligible verses and a memorable sung chorus; restrained backing harmonies only in the final chorus. Open with a two-bar guitar-and-vibraphone motif, move quickly through verse and chorus, add a short clarinet turnaround before verse two, then finish with a resolved final chorus and clean instrumental button. Keep the vocal forward in the mix and every technical term easy to understand. No sound effects, crowd noise, cinematic impacts, or long instrumental solo." \
  duration=60 \
  settings.lyrics="[Verse 1]
Pollen rides on fabric, soil, and air,
A microscopic trace collected with care.
Shape, pores, and surface patterns help reveal
Which plant left the grain upon the seal.

[Chorus]
Collect it clean, compare the scene,
Read the grains that travel unseen.
One grain suggests; a group can show
The plants and places evidence may know.

[Verse 2]
Use sterile tools and package items dry,
Label every sample: where, when, and why.
Reference slides and seasonal records guide,
But context keeps conclusions qualified.

[Final Chorus]
Collect it clean, compare the scene,
Read the grains that travel unseen.
Document the chain, let findings stay
Measured, repeatable, and clear all the way." \
  settings.bpm=118 \
  settings.keyScale="C minor" \
  settings.timeSignature=4 \
  settings.vocalLanguage=en
{
  "taskType": "audioInference",
  "taskUUID": "8edeea6f-6cbb-424c-b5cd-3024b5fb88f1",
  "model": "runware:ace-step@v1.5-xl-turbo",
  "positivePrompt": "Complete educational micro-song for a forensic science e-learning module about palynology. Warm, precise 1960s bossa nova with nylon-string guitar, brushed drum kit, upright bass, soft vibraphone, and brief clarinet responses. Calm, curious, academically credible mood rather than comic or childish. Clear English alto lead vocal with lightly spoken, highly intelligible verses and a memorable sung chorus; restrained backing harmonies only in the final chorus. Open with a two-bar guitar-and-vibraphone motif, move quickly through verse and chorus, add a short clarinet turnaround before verse two, then finish with a resolved final chorus and clean instrumental button. Keep the vocal forward in the mix and every technical term easy to understand. No sound effects, crowd noise, cinematic impacts, or long instrumental solo.",
  "duration": 60,
  "settings": {
    "lyrics": "[Verse 1]\nPollen rides on fabric, soil, and air,\nA microscopic trace collected with care.\nShape, pores, and surface patterns help reveal\nWhich plant left the grain upon the seal.\n\n[Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nOne grain suggests; a group can show\nThe plants and places evidence may know.\n\n[Verse 2]\nUse sterile tools and package items dry,\nLabel every sample: where, when, and why.\nReference slides and seasonal records guide,\nBut context keeps conclusions qualified.\n\n[Final Chorus]\nCollect it clean, compare the scene,\nRead the grains that travel unseen.\nDocument the chain, let findings stay\nMeasured, repeatable, and clear all the way.",
    "bpm": 118,
    "keyScale": "C minor",
    "timeSignature": 4,
    "vocalLanguage": "en"
  }
}
Response
{
  "taskType": "audioInference",
  "taskUUID": "8edeea6f-6cbb-424c-b5cd-3024b5fb88f1",
  "audioUUID": "a34c1ab4-54e3-4c70-9dba-8a88f52db8a1",
  "audioURL": "https://am.runware.ai/audio/os/a05d22/ws/5/ai/a34c1ab4-54e3-4c70-9dba-8a88f52db8a1.mp3",
  "seed": 859624262,
  "cost": 0.0009
}

audio-driven

Heritage Crop Seed Vault Voiceover$0.0048~21s
0:00
Try in Playground
import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:ace-step@v1.5-xl-turbo',
  positivePrompt: 'Reimagine the entire source track as a premium narrated explainer for a regional heritage seed vault. Preserve its recognizable musical architecture: opening motif, phrase lengths, harmonic movement, sectional transitions, bridge placement, emotional peak, and resolved ending. Replace the original production with intimate chamber electronica built from felt piano, muted cello, glass marimba, soft seed-pod shakers, subtle modular pulses, bowed vibraphone, and a faint bed of field ambience suggesting wind through dry grain. The mood should feel quietly urgent, tactile, intelligent, and hopeful rather than sentimental. Keep the arrangement spacious beneath the words, then let the instruments gently bloom around the final message.\n\nFeature one warm, grounded adult female narrator speaking in clear natural English. This is voiceover, not singing, chanting, rapping, or theatrical character acting. Use measured documentary pacing, precise diction, restrained emotion, and short intentional pauses. Keep the voice centered, close, dry, and consistently intelligible above the music.\n\nNarration, spoken verbatim:\n\n“Most seeds are built to travel. Some are built to wait.\n\nInside regional seed libraries, rare beans, grains, and orchard varieties are dried, catalogued, and stored. When drought, disease, or changing seasons erase a crop from the field, its next chapter can begin from a labeled envelope.\n\nFarmers contribute seed. Researchers test resilience. Communities protect the plants shaped by their soil, their weather, and their stories.\n\nA seed vault is not a museum of what agriculture was. It is a working backup for what food can become.\n\nSupport your regional seed library—and help tomorrow take root.”\n\nAllow brief instrumental breaths between paragraphs. Finish with a soft cello resolution, the opening glass-marimba motif, and natural room decay.',
  strength: 0.55,
  inputs: {
    audio: 'https://assets.runware.ai/assets/inputs/8c309ce7-7737-4a9b-b5bb-88cce74869b2.mp3'
  }
})
import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:ace-step@v1.5-xl-turbo",
            "positivePrompt": "Reimagine the entire source track as a premium narrated explainer for a regional heritage seed vault. Preserve its recognizable musical architecture: opening motif, phrase lengths, harmonic movement, sectional transitions, bridge placement, emotional peak, and resolved ending. Replace the original production with intimate chamber electronica built from felt piano, muted cello, glass marimba, soft seed-pod shakers, subtle modular pulses, bowed vibraphone, and a faint bed of field ambience suggesting wind through dry grain. The mood should feel quietly urgent, tactile, intelligent, and hopeful rather than sentimental. Keep the arrangement spacious beneath the words, then let the instruments gently bloom around the final message.\n\nFeature one warm, grounded adult female narrator speaking in clear natural English. This is voiceover, not singing, chanting, rapping, or theatrical character acting. Use measured documentary pacing, precise diction, restrained emotion, and short intentional pauses. Keep the voice centered, close, dry, and consistently intelligible above the music.\n\nNarration, spoken verbatim:\n\n“Most seeds are built to travel. Some are built to wait.\n\nInside regional seed libraries, rare beans, grains, and orchard varieties are dried, catalogued, and stored. When drought, disease, or changing seasons erase a crop from the field, its next chapter can begin from a labeled envelope.\n\nFarmers contribute seed. Researchers test resilience. Communities protect the plants shaped by their soil, their weather, and their stories.\n\nA seed vault is not a museum of what agriculture was. It is a working backup for what food can become.\n\nSupport your regional seed library—and help tomorrow take root.”\n\nAllow brief instrumental breaths between paragraphs. Finish with a soft cello resolution, the opening glass-marimba motif, and natural room decay.",
            "strength": 0.55,
            "inputs": {
                "audio": "https://assets.runware.ai/assets/inputs/8c309ce7-7737-4a9b-b5bb-88cce74869b2.mp3"
            }
        })


asyncio.run(main())
curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "audioInference",
      "taskUUID": "e40e5ef2-6e94-4649-8008-4ce11094f0bc",
      "model": "runware:ace-step@v1.5-xl-turbo",
      "positivePrompt": "Reimagine the entire source track as a premium narrated explainer for a regional heritage seed vault. Preserve its recognizable musical architecture: opening motif, phrase lengths, harmonic movement, sectional transitions, bridge placement, emotional peak, and resolved ending. Replace the original production with intimate chamber electronica built from felt piano, muted cello, glass marimba, soft seed-pod shakers, subtle modular pulses, bowed vibraphone, and a faint bed of field ambience suggesting wind through dry grain. The mood should feel quietly urgent, tactile, intelligent, and hopeful rather than sentimental. Keep the arrangement spacious beneath the words, then let the instruments gently bloom around the final message.\n\nFeature one warm, grounded adult female narrator speaking in clear natural English. This is voiceover, not singing, chanting, rapping, or theatrical character acting. Use measured documentary pacing, precise diction, restrained emotion, and short intentional pauses. Keep the voice centered, close, dry, and consistently intelligible above the music.\n\nNarration, spoken verbatim:\n\n“Most seeds are built to travel. Some are built to wait.\n\nInside regional seed libraries, rare beans, grains, and orchard varieties are dried, catalogued, and stored. When drought, disease, or changing seasons erase a crop from the field, its next chapter can begin from a labeled envelope.\n\nFarmers contribute seed. Researchers test resilience. Communities protect the plants shaped by their soil, their weather, and their stories.\n\nA seed vault is not a museum of what agriculture was. It is a working backup for what food can become.\n\nSupport your regional seed library—and help tomorrow take root.”\n\nAllow brief instrumental breaths between paragraphs. Finish with a soft cello resolution, the opening glass-marimba motif, and natural room decay.",
      "strength": 0.55,
      "inputs": {
        "audio": "https://assets.runware.ai/assets/inputs/8c309ce7-7737-4a9b-b5bb-88cce74869b2.mp3"
      }
    }
  ]'
runware run runware:ace-step@v1.5-xl-turbo \
  positivePrompt="Reimagine the entire source track as a premium narrated explainer for a regional heritage seed vault. Preserve its recognizable musical architecture: opening motif, phrase lengths, harmonic movement, sectional transitions, bridge placement, emotional peak, and resolved ending. Replace the original production with intimate chamber electronica built from felt piano, muted cello, glass marimba, soft seed-pod shakers, subtle modular pulses, bowed vibraphone, and a faint bed of field ambience suggesting wind through dry grain. The mood should feel quietly urgent, tactile, intelligent, and hopeful rather than sentimental. Keep the arrangement spacious beneath the words, then let the instruments gently bloom around the final message.

Feature one warm, grounded adult female narrator speaking in clear natural English. This is voiceover, not singing, chanting, rapping, or theatrical character acting. Use measured documentary pacing, precise diction, restrained emotion, and short intentional pauses. Keep the voice centered, close, dry, and consistently intelligible above the music.

Narration, spoken verbatim:

“Most seeds are built to travel. Some are built to wait.

Inside regional seed libraries, rare beans, grains, and orchard varieties are dried, catalogued, and stored. When drought, disease, or changing seasons erase a crop from the field, its next chapter can begin from a labeled envelope.

Farmers contribute seed. Researchers test resilience. Communities protect the plants shaped by their soil, their weather, and their stories.

A seed vault is not a museum of what agriculture was. It is a working backup for what food can become.

Support your regional seed library—and help tomorrow take root.”

Allow brief instrumental breaths between paragraphs. Finish with a soft cello resolution, the opening glass-marimba motif, and natural room decay." \
  strength=0.55 \
  inputs.audio=https://assets.runware.ai/assets/inputs/8c309ce7-7737-4a9b-b5bb-88cce74869b2.mp3
{
  "taskType": "audioInference",
  "taskUUID": "e40e5ef2-6e94-4649-8008-4ce11094f0bc",
  "model": "runware:ace-step@v1.5-xl-turbo",
  "positivePrompt": "Reimagine the entire source track as a premium narrated explainer for a regional heritage seed vault. Preserve its recognizable musical architecture: opening motif, phrase lengths, harmonic movement, sectional transitions, bridge placement, emotional peak, and resolved ending. Replace the original production with intimate chamber electronica built from felt piano, muted cello, glass marimba, soft seed-pod shakers, subtle modular pulses, bowed vibraphone, and a faint bed of field ambience suggesting wind through dry grain. The mood should feel quietly urgent, tactile, intelligent, and hopeful rather than sentimental. Keep the arrangement spacious beneath the words, then let the instruments gently bloom around the final message.\n\nFeature one warm, grounded adult female narrator speaking in clear natural English. This is voiceover, not singing, chanting, rapping, or theatrical character acting. Use measured documentary pacing, precise diction, restrained emotion, and short intentional pauses. Keep the voice centered, close, dry, and consistently intelligible above the music.\n\nNarration, spoken verbatim:\n\n“Most seeds are built to travel. Some are built to wait.\n\nInside regional seed libraries, rare beans, grains, and orchard varieties are dried, catalogued, and stored. When drought, disease, or changing seasons erase a crop from the field, its next chapter can begin from a labeled envelope.\n\nFarmers contribute seed. Researchers test resilience. Communities protect the plants shaped by their soil, their weather, and their stories.\n\nA seed vault is not a museum of what agriculture was. It is a working backup for what food can become.\n\nSupport your regional seed library—and help tomorrow take root.”\n\nAllow brief instrumental breaths between paragraphs. Finish with a soft cello resolution, the opening glass-marimba motif, and natural room decay.",
  "strength": 0.55,
  "inputs": {
    "audio": "https://assets.runware.ai/assets/inputs/8c309ce7-7737-4a9b-b5bb-88cce74869b2.mp3"
  }
}
Response
{
  "taskType": "audioInference",
  "taskUUID": "e40e5ef2-6e94-4649-8008-4ce11094f0bc",
  "audioUUID": "4de20858-9052-4510-8f23-8dd18772db8e",
  "audioURL": "https://am.runware.ai/audio/os/a05d22/ws/5/ai/4de20858-9052-4510-8f23-8dd18772db8e.mp3",
  "seed": 1241974741,
  "cost": 0.0048
}

audio-repaint

Rare Books Podcast Intro Segment$0.0039~22s
0:00
Try in Playground
import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:ace-step@v1.5-xl-turbo',
  positivePrompt: 'Replace only the designated internal section of the supplied podcast intro with a concise investigative chapter passage. Preserve the source track outside the repaint interval exactly. Match its tempo, key, room tone, analog warmth, dynamics, and chamber-jazz instrumentation so both edit boundaries feel musically invisible. Develop the established felt-piano motif into a more focused question-and-discovery phrase, answered by pizzicato cello and a brief bass-clarinet figure. Add delicate percussive details resembling a catalogue card being placed on a wooden desk, integrated rhythmically rather than as a literal sound effect. Keep brushed drums restrained and leave generous midrange space for host narration. The mood should suggest meticulous archival research, uncertain provenance, and an elegant auction-room atmosphere without becoming sinister. Build mild momentum through the middle of the replacement, then simplify the harmony and texture before the end boundary so it reconnects naturally to the untouched continuation. Instrumental only, no vocals, no spoken words, no dramatic trailer hits, and no abrupt change in loudness.',
  strength: 0.7,
  settings: {
    repaintingStart: 8,
    repaintingEnd: 20
  },
  inputs: {
    audio: 'https://assets.runware.ai/assets/inputs/646e01e4-2cf7-46fb-ab73-c07c4890ac1d.mp3'
  }
})
import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:ace-step@v1.5-xl-turbo",
            "positivePrompt": "Replace only the designated internal section of the supplied podcast intro with a concise investigative chapter passage. Preserve the source track outside the repaint interval exactly. Match its tempo, key, room tone, analog warmth, dynamics, and chamber-jazz instrumentation so both edit boundaries feel musically invisible. Develop the established felt-piano motif into a more focused question-and-discovery phrase, answered by pizzicato cello and a brief bass-clarinet figure. Add delicate percussive details resembling a catalogue card being placed on a wooden desk, integrated rhythmically rather than as a literal sound effect. Keep brushed drums restrained and leave generous midrange space for host narration. The mood should suggest meticulous archival research, uncertain provenance, and an elegant auction-room atmosphere without becoming sinister. Build mild momentum through the middle of the replacement, then simplify the harmony and texture before the end boundary so it reconnects naturally to the untouched continuation. Instrumental only, no vocals, no spoken words, no dramatic trailer hits, and no abrupt change in loudness.",
            "strength": 0.7,
            "settings": {
                "repaintingStart": 8,
                "repaintingEnd": 20
            },
            "inputs": {
                "audio": "https://assets.runware.ai/assets/inputs/646e01e4-2cf7-46fb-ab73-c07c4890ac1d.mp3"
            }
        })


asyncio.run(main())
curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "audioInference",
      "taskUUID": "9d8e3335-2c7a-4a68-b87c-a3cfe7408f03",
      "model": "runware:ace-step@v1.5-xl-turbo",
      "positivePrompt": "Replace only the designated internal section of the supplied podcast intro with a concise investigative chapter passage. Preserve the source track outside the repaint interval exactly. Match its tempo, key, room tone, analog warmth, dynamics, and chamber-jazz instrumentation so both edit boundaries feel musically invisible. Develop the established felt-piano motif into a more focused question-and-discovery phrase, answered by pizzicato cello and a brief bass-clarinet figure. Add delicate percussive details resembling a catalogue card being placed on a wooden desk, integrated rhythmically rather than as a literal sound effect. Keep brushed drums restrained and leave generous midrange space for host narration. The mood should suggest meticulous archival research, uncertain provenance, and an elegant auction-room atmosphere without becoming sinister. Build mild momentum through the middle of the replacement, then simplify the harmony and texture before the end boundary so it reconnects naturally to the untouched continuation. Instrumental only, no vocals, no spoken words, no dramatic trailer hits, and no abrupt change in loudness.",
      "strength": 0.7,
      "settings": {
        "repaintingStart": 8,
        "repaintingEnd": 20
      },
      "inputs": {
        "audio": "https://assets.runware.ai/assets/inputs/646e01e4-2cf7-46fb-ab73-c07c4890ac1d.mp3"
      }
    }
  ]'
runware run runware:ace-step@v1.5-xl-turbo \
  positivePrompt="Replace only the designated internal section of the supplied podcast intro with a concise investigative chapter passage. Preserve the source track outside the repaint interval exactly. Match its tempo, key, room tone, analog warmth, dynamics, and chamber-jazz instrumentation so both edit boundaries feel musically invisible. Develop the established felt-piano motif into a more focused question-and-discovery phrase, answered by pizzicato cello and a brief bass-clarinet figure. Add delicate percussive details resembling a catalogue card being placed on a wooden desk, integrated rhythmically rather than as a literal sound effect. Keep brushed drums restrained and leave generous midrange space for host narration. The mood should suggest meticulous archival research, uncertain provenance, and an elegant auction-room atmosphere without becoming sinister. Build mild momentum through the middle of the replacement, then simplify the harmony and texture before the end boundary so it reconnects naturally to the untouched continuation. Instrumental only, no vocals, no spoken words, no dramatic trailer hits, and no abrupt change in loudness." \
  strength=0.7 \
  settings.repaintingStart=8 \
  settings.repaintingEnd=20 \
  inputs.audio=https://assets.runware.ai/assets/inputs/646e01e4-2cf7-46fb-ab73-c07c4890ac1d.mp3
{
  "taskType": "audioInference",
  "taskUUID": "9d8e3335-2c7a-4a68-b87c-a3cfe7408f03",
  "model": "runware:ace-step@v1.5-xl-turbo",
  "positivePrompt": "Replace only the designated internal section of the supplied podcast intro with a concise investigative chapter passage. Preserve the source track outside the repaint interval exactly. Match its tempo, key, room tone, analog warmth, dynamics, and chamber-jazz instrumentation so both edit boundaries feel musically invisible. Develop the established felt-piano motif into a more focused question-and-discovery phrase, answered by pizzicato cello and a brief bass-clarinet figure. Add delicate percussive details resembling a catalogue card being placed on a wooden desk, integrated rhythmically rather than as a literal sound effect. Keep brushed drums restrained and leave generous midrange space for host narration. The mood should suggest meticulous archival research, uncertain provenance, and an elegant auction-room atmosphere without becoming sinister. Build mild momentum through the middle of the replacement, then simplify the harmony and texture before the end boundary so it reconnects naturally to the untouched continuation. Instrumental only, no vocals, no spoken words, no dramatic trailer hits, and no abrupt change in loudness.",
  "strength": 0.7,
  "settings": {
    "repaintingStart": 8,
    "repaintingEnd": 20
  },
  "inputs": {
    "audio": "https://assets.runware.ai/assets/inputs/646e01e4-2cf7-46fb-ab73-c07c4890ac1d.mp3"
  }
}
Response
{
  "taskType": "audioInference",
  "taskUUID": "9d8e3335-2c7a-4a68-b87c-a3cfe7408f03",
  "audioUUID": "781467f8-404d-491e-8f76-a8920e209f93",
  "audioURL": "https://am.runware.ai/audio/os/a08dlim3/ws/5/ai/781467f8-404d-491e-8f76-a8920e209f93.mp3",
  "seed": 9034549,
  "cost": 0.0039
}

audio-extend

Wastewater Energy Narration Spot$0.00195~20s
0:00
Try in Playground
import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:ace-step@v1.5-xl-turbo',
  positivePrompt: 'Continue naturally from the exact endpoint of the source track, preserving its rhythm, key, muted marimba, soft hand percussion, rounded bass, glass accents, subtle treatment-plant textures, warm documentary mix, and calm female narrator. Maintain the same measured delivery and public-service tone. The narrator continues verbatim: “That means fewer emissions, lower fuel costs, and a treatment plant that powers part of the city it serves. The next time a bus rolls past, some of its energy may have started beneath your street. Wastewater isn’t the end of the story. It’s where recovery begins.” Let the arrangement gently broaden beneath “powers part of the city,” then resolve after the final sentence with a concise marimba motif, warm sustained chord, and clean natural tail. Spoken narration only, not sung; clear intelligibility, no dramatic trailer effects, no abrupt transition.',
  strength: 0.65,
  settings: {
    repaintingStart: 30,
    repaintingEnd: 50
  },
  inputs: {
    audio: 'https://assets.runware.ai/assets/inputs/d14a856b-29eb-4c52-bdeb-3e77ec533bb3.mp3'
  }
})
import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:ace-step@v1.5-xl-turbo",
            "positivePrompt": "Continue naturally from the exact endpoint of the source track, preserving its rhythm, key, muted marimba, soft hand percussion, rounded bass, glass accents, subtle treatment-plant textures, warm documentary mix, and calm female narrator. Maintain the same measured delivery and public-service tone. The narrator continues verbatim: “That means fewer emissions, lower fuel costs, and a treatment plant that powers part of the city it serves. The next time a bus rolls past, some of its energy may have started beneath your street. Wastewater isn’t the end of the story. It’s where recovery begins.” Let the arrangement gently broaden beneath “powers part of the city,” then resolve after the final sentence with a concise marimba motif, warm sustained chord, and clean natural tail. Spoken narration only, not sung; clear intelligibility, no dramatic trailer effects, no abrupt transition.",
            "strength": 0.65,
            "settings": {
                "repaintingStart": 30,
                "repaintingEnd": 50
            },
            "inputs": {
                "audio": "https://assets.runware.ai/assets/inputs/d14a856b-29eb-4c52-bdeb-3e77ec533bb3.mp3"
            }
        })


asyncio.run(main())
curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "audioInference",
      "taskUUID": "a138954c-8d5b-4d96-bcc1-6acf5042bd5b",
      "model": "runware:ace-step@v1.5-xl-turbo",
      "positivePrompt": "Continue naturally from the exact endpoint of the source track, preserving its rhythm, key, muted marimba, soft hand percussion, rounded bass, glass accents, subtle treatment-plant textures, warm documentary mix, and calm female narrator. Maintain the same measured delivery and public-service tone. The narrator continues verbatim: “That means fewer emissions, lower fuel costs, and a treatment plant that powers part of the city it serves. The next time a bus rolls past, some of its energy may have started beneath your street. Wastewater isn’t the end of the story. It’s where recovery begins.” Let the arrangement gently broaden beneath “powers part of the city,” then resolve after the final sentence with a concise marimba motif, warm sustained chord, and clean natural tail. Spoken narration only, not sung; clear intelligibility, no dramatic trailer effects, no abrupt transition.",
      "strength": 0.65,
      "settings": {
        "repaintingStart": 30,
        "repaintingEnd": 50
      },
      "inputs": {
        "audio": "https://assets.runware.ai/assets/inputs/d14a856b-29eb-4c52-bdeb-3e77ec533bb3.mp3"
      }
    }
  ]'
runware run runware:ace-step@v1.5-xl-turbo \
  positivePrompt="Continue naturally from the exact endpoint of the source track, preserving its rhythm, key, muted marimba, soft hand percussion, rounded bass, glass accents, subtle treatment-plant textures, warm documentary mix, and calm female narrator. Maintain the same measured delivery and public-service tone. The narrator continues verbatim: “That means fewer emissions, lower fuel costs, and a treatment plant that powers part of the city it serves. The next time a bus rolls past, some of its energy may have started beneath your street. Wastewater isn’t the end of the story. It’s where recovery begins.” Let the arrangement gently broaden beneath “powers part of the city,” then resolve after the final sentence with a concise marimba motif, warm sustained chord, and clean natural tail. Spoken narration only, not sung; clear intelligibility, no dramatic trailer effects, no abrupt transition." \
  strength=0.65 \
  settings.repaintingStart=30 \
  settings.repaintingEnd=50 \
  inputs.audio=https://assets.runware.ai/assets/inputs/d14a856b-29eb-4c52-bdeb-3e77ec533bb3.mp3
{
  "taskType": "audioInference",
  "taskUUID": "a138954c-8d5b-4d96-bcc1-6acf5042bd5b",
  "model": "runware:ace-step@v1.5-xl-turbo",
  "positivePrompt": "Continue naturally from the exact endpoint of the source track, preserving its rhythm, key, muted marimba, soft hand percussion, rounded bass, glass accents, subtle treatment-plant textures, warm documentary mix, and calm female narrator. Maintain the same measured delivery and public-service tone. The narrator continues verbatim: “That means fewer emissions, lower fuel costs, and a treatment plant that powers part of the city it serves. The next time a bus rolls past, some of its energy may have started beneath your street. Wastewater isn’t the end of the story. It’s where recovery begins.” Let the arrangement gently broaden beneath “powers part of the city,” then resolve after the final sentence with a concise marimba motif, warm sustained chord, and clean natural tail. Spoken narration only, not sung; clear intelligibility, no dramatic trailer effects, no abrupt transition.",
  "strength": 0.65,
  "settings": {
    "repaintingStart": 30,
    "repaintingEnd": 50
  },
  "inputs": {
    "audio": "https://assets.runware.ai/assets/inputs/d14a856b-29eb-4c52-bdeb-3e77ec533bb3.mp3"
  }
}
Response
{
  "taskType": "audioInference",
  "taskUUID": "a138954c-8d5b-4d96-bcc1-6acf5042bd5b",
  "audioUUID": "249d48b9-89ec-4bb7-8d5b-64930278006d",
  "audioURL": "https://am.runware.ai/audio/os/a03d21/ws/5/ai/249d48b9-89ec-4bb7-8d5b-64930278006d.mp3",
  "seed": 342004805,
  "cost": 0.00195
}