# ACE Step Audio Inpaint API

> Atjauno izvēlētu laika intervālu esošā audio failā, izmantojot jaunus tagus un vārdus

Saņem `audio_url` un pārraksta tikai sadaļu starp `start_time` un `end_time`, kas tiek mērīti sekundēs no 0 līdz 240. Katru laiku var iestatīt attiecībā pret klipa sākumu vai beigām. Jaunie `tags` un `lyrics` vada aizstājamo daļu, bet `variance` kontrolē rezultāta dažādību. Pieejami parastie norādījumu un soļu iestatījumi.

- 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/lv/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 |  |  | Audio faila URL attēla aizkrāsošanai. |
| `start_time_relative_to` |  | enum (string) | no | `start` | `start`, `end` | Atsauces punkts sākuma laikam: audio sākums vai beigas. |
| `start_time` |  | number | no | `0` | 0 – 240 | Aizkrāsošanas sākuma laiks sekundēs. |
| `end_time_relative_to` |  | enum (string) | no | `start` | `start`, `end` | Atsauces punkts beigu laikam: audio sākums vai beigas. |
| `end_time` |  | number | no | `30` | 0 – 240 | Aizkrāsošanas beigu laiks sekundēs. |
| `tags` |  | string | yes |  |  | Audio stila tagi, kas norādīti ar komatiem atdalītu žanru veidā; kā alternatīvu to norādīšanai var izmantot `prompt`. |
| `lyrics` |  | string | no | `` |  | Dziedamie vārdi, kuros dziesmas sadaļas strukturētas, izmantojot tādas vadīklas kā [verse], [chorus] un [bridge]. Audio bez dziedamiem vārdiem gadījumā izlaidiet šo ievadi vai norādiet tikai [inst] vai [instrumental]. |
| `variance` |  | number | no | `0.5` | 0 – 1 | Aizkrāsošanas dispersija nosaka, cik daudzveidīgi var būt rezultāti; tās palielināšana var radīt lielāku variāciju. |
| `number_of_steps` |  | integer | no | `27` | 3 – 60 | Audio ģenerēšanas laikā izmantotais soļu skaits. |
| `seed` |  | integer \| null | no |  |  | Sēkla atkārtojamai ģenerēšanai; ja vērtība nav norādīta, tā tiek izvēlēta nejauši. |
| `scheduler` |  | enum (string) | no | `euler` | `euler`, `heun` | Ģenerēšanas laikā izmantotais plānotājs. |
| `guidance_type` |  | enum (string) | no | `apg` | `cfg`, `apg`, `cfg_star` | Ģenerēšanas laikā izmantotais CFG tips. |
| `granularity_scale` |  | integer | no | `10` | -100 – 100 | Ģenerēšanas laikā lietotā granularitātes skala. Tās palielināšana var samazināt artefaktus. |
| `guidance_interval` |  | number | no | `0.5` | 0 – 1 | Ģenerēšanas grafika daļa, kurai tiek lietota vadība: izvēloties 0.5, tā tiek ierobežota ar soļiem no 0.25 * infer_steps līdz 0.75 * infer_steps, atstājot sākumu un beigas bez vadības. |
| `guidance_interval_decay` |  | number | no | `0` | 0 – 1 | Vadības samazināšanās ģenerēšanas intervālā: 0.0 saglabā samazināšanos atspējotu; pretējā gadījumā skala šajā intervālā samazinās no guidance_scale līdz min_guidance_scale. |
| `guidance_scale` |  | number | no | `15` | 0 – 200 | Ģenerēšanas laikā lietotās vadības skala. |
| `minimum_guidance_scale` |  | number | no | `3` | 0 – 200 | Zemākā vadības skala, kas ģenerēšanas laikā tiek sasniegta pēc samazināšanās. |
| `tag_guidance_scale` |  | number | no | `5` | 0 – 10 | Ģenerēšanas laikā lietotās tagu vadības skala. |
| `lyric_guidance_scale` |  | number | no | `1.5` | 0 – 10 | Ģenerēšanas laikā lietotās dziesmas vārdu vadības skala. |

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} | Ģenerēšanas rezultātā iegūtais audio fails. |
| `seed` | integer | Ģenerēšanas laikā izmantotā nejaušā sēkla. |
| `tags` | string | Ģenerēšanas laikā lietotie žanru tagi. |
| `lyrics` | string | Ģenerēšanas laikā lietotie dziesmas vārdi. |

## 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