# Stable Audio 3 Medium Base Audio to Audio API

> Base-checkpoint Medium audio-to-audio ریمکس: پرامپٹ سے ماخذ کلپ کو تبدیل کرتا ہے، زیادہ سے زیادہ 380 سیکنڈ تک

`audio_url` کے ذریعے سورس کلپ اور متنی `prompt` لے کر اس کا تبدیل شدہ ورژن تیار کرتا ہے۔ `init_noise_level` (0 سے 1) متعین کرتا ہے کہ نتیجہ ان پٹ کی کتنی پیروی کرے، جبکہ `duration` 1 سے 380 سیکنڈ قبول کرتا ہے۔ یہ non-distilled چیک پوائنٹ ہے، اس لیے ڈیفالٹ 50 سیمپلنگ مراحل اور 7 کی رہنمائی اسکیل ہے۔ آؤٹ پٹ mp3، wav، flac، ogg، opus، m4a یا aac ہو سکتا ہے۔

- Model id: `stable-audio-3/medium/base/audio-to-audio`
- Made by: Stability AI
- Category: Audio
- Output: audio
- Price: $0.0523 / request (cheapest run $0.053 (53 API credits))
- Run: `POST https://api.doitong.com/v1/run/stable-audio-3/medium/base/audio-to-audio`
- Quote: `POST https://api.doitong.com/v1/quote/stable-audio-3/medium/base/audio-to-audio`
- Docs page: https://doitong.com/ur/developers/models/stable-audio-3/medium/base/audio-to-audio

## Pricing

Price: **$0.0523 / request**. Billed once per request.

The full example input below costs $0.053 = 53 API credits (1 request × 52.3 API credits).

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/stable-audio-3/medium/base/audio-to-audio` 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 |
|---|---|---|---|---|---|---|
| `negative_prompt` |  | string | no | `` |  | آؤٹ پٹ میں ناپسندیدہ خصوصیات بیان کرنے والا متن۔ |
| `duration` |  | number | no | `30` | 1 – 380 | سیکنڈز میں آڈیو کی لمبائی، medium-model کی زیادہ سے زیادہ حد 380 سیکنڈ (تقریباً 6 منٹ 20 سیکنڈ) ہے۔ |
| `num_inference_steps` |  | integer | no | `50` | 1 – 100 | چلائے جانے والے sampling steps کی تعداد منتخب کریں؛ base (non-distilled) checkpoints استعمال کرتے وقت اچھی quality کے لیے تقریباً 50 مناسب ہیں۔ |
| `guidance_scale` |  | number | no | `7` | 0 – 25 | Classifier-free guidance strength؛ base checkpoints پر ابتدا میں تقریباً 7.0 تجویز کیا جاتا ہے، اور اسے بڑھانے سے تخلیق پرامپٹ سے زیادہ قریب رہتی ہے۔ |
| `seed` |  | integer \| null | no |  |  | قابل تکرار نتائج کے لیے random generator seed؛ اسے چھوڑنے پر random seed منتخب ہوتا ہے۔ |
| `enable_prompt_expansion` |  | boolean | no | `false` |  | فعال ہونے پر LLM کے ذریعے پرامپٹ کی توسیع، جس سے تفصیل اور نتیجے کا معیار بہتر ہوتا ہے۔ |
| `enable_safety_checker` |  | boolean | no | `true` |  | NSFW مواد کی safety checking۔ |
| `output_format` |  | enum (string) | no | `mp3` | `mp3`, `wav`, `flac`, `ogg`, `opus`, `m4a`, `aac` | نتیجے کے آڈیو کے لیے استعمال ہونے والا container format۔ |
| `bitrate` |  | string | no | `192k` |  | آؤٹ پٹ آڈیو bitrate، wav یا flac کے لیے نظرانداز ہوتا ہے کیونکہ یہ lossless ہیں۔ mp3، aac یا opus جیسے compressed formats کے لیے '192k' یا '320k' کی شکل میں قدر فراہم کریں۔ |
| `prompt` |  | string | yes |  |  | ماخذ آڈیو پر لاگو کی جانے والی تبدیلی کی متنی ہدایات۔ |
| `audio_url` | `audio` | string (audio URL) | yes |  |  | تبدیلی کے لیے ان پٹ آڈیو۔ |
| `init_noise_level` |  | number | no | `0.9` | 0 – 1 | ماخذ آڈیو کی noise level: 0.1 ان پٹ سے قریبی مماثلت برقرار رکھتا ہے، 0.5 درمیانی ہے، جبکہ 1.0 ماخذ کو مکمل طور پر noise سے بدل کر خالص تخلیق کرتا ہے۔ |

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
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "audio": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "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/stable-audio-3/medium/base/audio-to-audio?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "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/stable-audio-3/medium/base/audio-to-audio?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "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 = {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "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/stable-audio-3/medium/base/audio-to-audio", 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": "stable-audio-3/medium/base/audio-to-audio",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "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": "stable-audio-3/medium/base/audio-to-audio",
  "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": 53,
    "usd": "0.053",
    "charged": 53,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "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,
    "prompt": "string"
  },
  "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} | تخلیق سے تیار کردہ آڈیو کلپ۔ |
| `seed` | integer | تخلیق کے دوران بے ترتیبی کو کنٹرول کرنے والا seed۔ |
| `prompt` | string | آؤٹ پٹ تخلیق کرنے کے لیے استعمال کیا گیا پرامپٹ۔ |

## Related models

- [Stable Audio 3 Small Music Audio Inpainting](https://doitong.com/developers/models/stable-audio-3/small/music/audio-inpainting.md) (`stable-audio-3/small/music/audio-inpainting`): $0.026 / request
- [Stable Audio 3 Small Music Audio Outpainting](https://doitong.com/developers/models/stable-audio-3/small/music/audio-outpainting.md) (`stable-audio-3/small/music/audio-outpainting`): $0.0265 / request
- [Stable Audio 3 Small Music Base Audio Inpainting](https://doitong.com/developers/models/stable-audio-3/small/music/base/audio-inpainting.md) (`stable-audio-3/small/music/base/audio-inpainting`): $0.0333 / request
- [Stable Audio 3 Small Music Base Audio Outpainting](https://doitong.com/developers/models/stable-audio-3/small/music/base/audio-outpainting.md) (`stable-audio-3/small/music/base/audio-outpainting`): $0.0339 / request
- [Stable Audio 3 Small Music Base Audio to Audio](https://doitong.com/developers/models/stable-audio-3/small/music/base/audio-to-audio.md) (`stable-audio-3/small/music/base/audio-to-audio`): $0.032 / request
- [Stable Audio 3 Small Music Text to Audio](https://doitong.com/developers/models/stable-audio-3/small/music/text-to-audio.md) (`stable-audio-3/small/music/text-to-audio`): $0.0217 / request
- [Stable Audio 3 · Small · Music · Audio to Audio](https://doitong.com/developers/models/stable-audio-3/small/music/audio-to-audio.md) (`stable-audio-3/small/music/audio-to-audio`): $0.0248 / request
- [Stable Audio 3 · Small · Music · Base · Text to Audio](https://doitong.com/developers/models/stable-audio-3/small/music/base/text-to-audio.md) (`stable-audio-3/small/music/base/text-to-audio`): $0.0281 / request

## Links

- HTML page: https://doitong.com/developers/models/stable-audio-3/medium/base/audio-to-audio
- 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=stable-audio-3/medium/base/audio-to-audio
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/stable-audio-3/medium/base/audio-to-audio