# ACE Step Audio Inpaint API

> Athghineann fuinneog ama roghnaithe de chomhad fuaime atá ann cheana ag úsáid clibeanna agus liricí nua

Glacann sé `audio_url` agus athscríobhann sé an chuid idir `start_time` agus `end_time` amháin, gach ceann tomhaiste i soicindí ó 0 go 240. Is féidir gach am a shocrú i gcoibhneas le tús nó deireadh an ghearrthóga. Treoraíonn `tags` agus `lyrics` nua an chuid athsholáthair, agus rialaíonn `variance` cé chomh héagsúil is atá an toradh. Tá na gnáthshocruithe treorach agus céimeanna ar fáil.

- Model id: `ace-step/audio-inpaint`
- Made by: ACE Studio
- Category: Text to Music
- Output: audio
- Price per second of your input audio: $0.0002 / second of input audio (cheapest run $0.001 (1 API credit))
- Run: `POST https://api.doitong.com/v1/run/ace-step/audio-inpaint`
- Quote: `POST https://api.doitong.com/v1/quote/ace-step/audio-inpaint`
- Docs page: https://doitong.com/ga/developers/models/ace-step/audio-inpaint

## Pricing

Price: **$0.0002 / second of input audio**. Price per second of your input audio: the input files are measured before the run (length, resolution, frame rate). The quote measures the same files and is exactly what the run charges.

The full example input below costs $0.002 = 2 API credits (10 s input audio × $0.0002).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/ace-step/audio-inpaint` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `audio_url` | `audio` | string (audio URL) | yes |  |  | URL an chomhaid fuaime le haghaidh inpainting. |
| `start_time_relative_to` |  | enum (string) | no | `start` | `start`, `end` | Pointe tagartha don am tosaithe: tús nó deireadh na fuaime. |
| `start_time` |  | number | no | `0` | 0 – 240 | Am tosaithe an inpainting, tomhaiste i soicindí. |
| `end_time_relative_to` |  | enum (string) | no | `start` | `start`, `end` | Pointe tagartha don am deiridh: tús nó deireadh na fuaime. |
| `end_time` |  | number | no | `30` | 0 – 240 | Am deiridh an inpainting, tomhaiste i soicindí. |
| `tags` |  | string | yes |  |  | Clibeanna stíle fuaime soláthraithe mar sheánraí scartha le camóga, agus `prompt` ar fáil mar bhealach eile chun iad a sholáthar. |
| `lyrics` |  | string | no | `` |  | Liricí canta, agus rannóga an amhráin eagraithe ag úsáid rialuithe amhail [verse], [chorus], agus [bridge]. Maidir le fuaim gan liricí canta, fág an t-ionchur seo ar lár nó soláthair [inst] nó [instrumental] amháin. |
| `variance` |  | number | no | `0.5` | 0 – 1 | Rialaíonn athraitheacht an inpainting cé chomh héagsúil is féidir leis na torthaí a bheith; d’fhéadfadh méadú air níos mó éagsúlachta a thabhairt isteach. |
| `number_of_steps` |  | integer | no | `27` | 3 – 60 | Líon na gcéimeanna a úsáidtear le linn giniúint fuaime. |
| `seed` |  | integer \| null | no |  |  | Síol le haghaidh giniúint in-atáirgthe, roghnaithe go randamach mura soláthraíonn tú luach. |
| `scheduler` |  | enum (string) | no | `euler` | `euler`, `heun` | Sceidealóir a úsáidtear le linn giniúna. |
| `guidance_type` |  | enum (string) | no | `apg` | `cfg`, `apg`, `cfg_star` | Cineál CFG a úsáidtear le linn giniúna. |
| `granularity_scale` |  | integer | no | `10` | -100 – 100 | Scála gráinneachta a chuirtear i bhfeidhm le linn giniúna. D’fhéadfadh méadú air déantáin a laghdú. |
| `guidance_interval` |  | number | no | `0.5` | 0 – 1 | An chuid den sceideal giniúna a fhaigheann treoir: má roghnaítear 0.5, cuirtear teorainn leis na céimeanna ó 0.25 * infer_steps go 0.75 * infer_steps, gan treoir ag an tús ná ag an deireadh. |
| `guidance_interval_decay` |  | number | no | `0` | 0 – 1 | Meath na treorach laistigh den eatramh giniúna: coimeádann 0.0 an meath díchumasaithe; murach sin, laghdaíonn an scála thar an eatramh sin ó guidance_scale go min_guidance_scale. |
| `guidance_scale` |  | number | no | `15` | 0 – 200 | Scála na treorach a chuirtear i bhfeidhm le linn giniúna. |
| `minimum_guidance_scale` |  | number | no | `3` | 0 – 200 | An scála treorach is ísle a shroichtear tar éis meatha le linn giniúna. |
| `tag_guidance_scale` |  | number | no | `5` | 0 – 10 | Scála na treorach clibeanna a chuirtear i bhfeidhm le linn giniúna. |
| `lyric_guidance_scale` |  | number | no | `1.5` | 0 – 10 | Scála na treorach liricí a chuirtear i bhfeidhm le linn giniúna. |

File parameters (`audio`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{
  "tags": "lofi, hiphop, drum and bass, trap, chill",
  "audio": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

A fuller example:

```json
{
  "tags": "lofi, hiphop, drum and bass, trap, chill",
  "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/ace-step/audio-inpaint?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tags": "lofi, hiphop, drum and bass, trap, chill",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.com/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/ace-step/audio-inpaint?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "tags": "lofi, hiphop, drum and bass, trap, chill",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "tags": "lofi, hiphop, drum and bass, trap, chill",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/ace-step/audio-inpaint", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.com/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "ace-step/audio-inpaint",
      "input": {
        "tags": "lofi, hiphop, drum and bass, trap, chill",
        "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "ace-step/audio-inpaint",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 2,
    "usd": "0.002",
    "charged": 2,
    "refunded": 0
  },
  "input": {
    "tags": "lofi, hiphop, drum and bass, trap, chill",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  },
  "output": {
    "audio": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp3",
      "content_type": "audio/mpeg",
      "file_name": "0-output.mp3",
      "file_size": 1843200
    },
    "seed": 42,
    "tags": "lofi, hiphop, drum and bass, trap, chill",
    "lyrics": "[inst]"
  },
  "outputs": [
    {
      "type": "audio",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp3",
      "content_type": "audio/mpeg",
      "file_size": 1843200,
      "duration": 12,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `audio` | object {url, content_type, file_name, file_size} | Comhad fuaime a tháirgtear leis an nginiúint. |
| `seed` | integer | Síol randamach a úsáidtear le linn giniúna. |
| `tags` | string | Clibeanna seánra a chuirtear i bhfeidhm le linn giniúna. |
| `lyrics` | string | Liricí a chuirtear i bhfeidhm le linn giniúna. |

## Related models

- [ACE Step](https://doitong.com/developers/models/ace-step.md) (`ace-step`): $0.0002 / second
- [ACE Step Audio Outpaint](https://doitong.com/developers/models/ace-step/audio-outpaint.md) (`ace-step/audio-outpaint`): $0.0002 / second of output audio
- [ACE Step Audio To Audio](https://doitong.com/developers/models/ace-step/audio-to-audio.md) (`ace-step/audio-to-audio`): $0.0002 / second of input audio
- [ACE Step Prompt To Audio](https://doitong.com/developers/models/ace-step/prompt-to-audio.md) (`ace-step/prompt-to-audio`): $0.0002 / second
- [MiniMax Music 3](https://doitong.com/developers/models/minimax/music-3.md) (`minimax/music-3`): $0.002 / second
- [DiffRhythm: Lyrics to Song](https://doitong.com/developers/models/diffrhythm.md) (`diffrhythm`): $0.001 / second
- [Elevenlabs Music](https://doitong.com/developers/models/elevenlabs/music.md) (`elevenlabs/music`): $0.60 / minute of output audio
- [Elevenlabs Music v2](https://doitong.com/developers/models/elevenlabs/music/v2.md) (`elevenlabs/music/v2`): $0.60 / minute of output audio

## Links

- HTML page: https://doitong.com/developers/models/ace-step/audio-inpaint
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=ace-step/audio-inpaint
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/ace-step/audio-inpaint