# MMAudio v2 API

> Provider: **Sony AI**
> Source: https://www.pixazo.ai/models/mmaudio

MMAudio v2 is Sony AI's text-to-audio generation model that synthesizes high-quality sound effects, ambient audio, and music from natural-language prompts.

## MMAudio v2

### Text to Audio

## Base URL

```
https://gateway.pixazo.ai/mmaudio-v2-text-to-audio/v1
```

## Authentication

All requests require an API key passed via header.

Header

Type

Required

Description

Ocp-Apim-Subscription-Key

string

Yes

Your API subscription key

## MMAudio V2 Text to Audio generate request - MMAudio V2 Text to Audio

## Request Code

HTTP Python JavaScript cURL

```
POST https://gateway.pixazo.ai/mmaudio-v2-text-to-audio/v1/mmaudio-v2-text-to-audio-request
Content-Type: application/json
Cache-Control: no-cache
Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY

{
  "prompt": "Gentle ocean waves crashing on a sandy beach with seagulls",
  "negative_prompt": "",
  "num_steps": 25,
  "duration": 8,
  "cfg_strength": 4.5,
  "mask_away_clip": false
}
```

```
import requests

url = "https://gateway.pixazo.ai/mmaudio-v2-text-to-audio/v1/mmaudio-v2-text-to-audio-request"
headers = {
    "Content-Type": "application/json",
    "Cache-Control": "no-cache",
    "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
}
data = {
    "prompt": "Gentle ocean waves crashing on a sandy beach with seagulls",
    "negative_prompt": "",
    "num_steps": 25,
    "duration": 8,
    "cfg_strength": 4.5,
    "mask_away_clip": false
}

response = requests.post(url, json=data, headers=headers)
print(response.json())
```

```
const url = "https://gateway.pixazo.ai/mmaudio-v2-text-to-audio/v1/mmaudio-v2-text-to-audio-request";
const headers = {
  "Content-Type": "application/json",
  "Cache-Control": "no-cache",
  "Ocp-Apim-Subscription-Key": "YOUR_SUBSCRIPTION_KEY"
};
const data = {
  "prompt": "Gentle ocean waves crashing on a sandy beach with seagulls",
  "negative_prompt": "",
  "num_steps": 25,
  "duration": 8,
  "cfg_strength": 4.5,
  "mask_away_clip": false
};

fetch(url, {
  method: "POST",
  headers: headers,
  body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error("Error:", error));
```

```
curl -X POST "https://gateway.pixazo.ai/mmaudio-v2-text-to-audio/v1/mmaudio-v2-text-to-audio-request" \
  -H "Content-Type: application/json" \
  -H "Cache-Control: no-cache" \
  -H "Ocp-Apim-Subscription-Key: YOUR_SUBSCRIPTION_KEY" \
  --data-raw '{
    "prompt": "Gentle ocean waves crashing on a sandy beach with seagulls",
    "negative_prompt": "",
    "num_steps": 25,
    "duration": 8,
    "cfg_strength": 4.5,
    "mask_away_clip": false
  }'
```

## Output

```
{
  "request_id": "mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

[Try Now](https://api.pixazo.ai/api-details#api=mmaudio-v2-text-to-audio&operation=mmaudio-v2-text-to-audio-request)

## Webhook (Optional)

Add the `X-Webhook-URL` header to your submit request to receive a `POST` callback when the job completes — no polling required.

### Webhook Headers

Header

Required

Default

Description

`X-Webhook-URL`

Yes (to enable)

—

HTTPS endpoint on your server that will receive the `POST` callback. Must respond `2xx` within a few seconds (process async if needed).

`X-Webhook-Mode`

No

`terminal`

`terminal` — fires once at the final status (`COMPLETED`/`FAILED`/`ERROR`). `sync` — fires on every poll cycle plus the terminal event, and caps the queue’s polling delay at **15s** for tighter progress updates.

### Example: enable webhook

```
X-Webhook-URL: https://your-server.com/webhook/callback
X-Webhook-Mode: terminal
```

### Callback Payload

Your endpoint receives a `POST application/json` with the same shape as the `GET /v2/requests/status/{request_id}` response. Example terminal callback (mode `terminal`):

```
{
  "request_id": "mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "mmaudio-v2-text-to-audio",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/output.wav"
    ],
    "media_type": "audio/wav"
  },
  "created_at": "2026-05-22T13:17:32.110Z",
  "updated_at": "2026-05-22 13:19:23",
  "completed_at": "2026-05-22 13:19:23"
}
```

### Failure callback shape

```
{
  "request_id": "mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "mmaudio-v2-text-to-audio",
  "error": "Description of the error",
  "output": null,
  "created_at": "...",
  "updated_at": "...",
  "completed_at": "..."
}
```

### Delivery semantics

-   **terminal mode (default)** — exactly one `POST` when the request reaches a terminal status. No callback during `PROCESSING`.
-   **sync mode** — `POST` on every status poll (with delay capped at ~15s) plus a final `POST` at terminal status. Use when you want progress updates.
-   **Idempotency** — use `request_id` as your idempotency key. Network retries can deliver the same callback more than once; your handler must tolerate duplicates.
-   **Response** — respond `200 OK` within a few seconds. The queue does not block on slow handlers, but persistent failures may stop further deliveries.
-   **HTTPS required** — plain `http://` URLs are rejected.

## Request Parameters - MMAudio V2 Text to Audio generate request

Field

Type

Required

Default

Description

prompt

string

Yes

—

A detailed text description of the desired audio. Example: "Gentle ocean waves crashing on a sandy beach with seagulls".

negative\_prompt

string

No

""

Describes sounds to avoid in the generated audio. Leave empty for no exclusion.

num\_steps

integer

No

25

Number of denoising steps. Higher values improve quality but increase generation time. Range: 10–100.

duration

integer

No

8

Duration of the generated audio in seconds. Range: 2–30.

cfg\_strength

number

No

4.5

Classifier-Free Guidance strength. Controls how closely the output follows the prompt. Higher values increase prompt adherence. Range: 1.0–10.0.

mask\_away\_clip

boolean

No

false

If true, masks out the beginning and end of the audio to avoid abrupt cuts. Recommended for seamless loops.

## Minimum Request

```
{
  "prompt": "Gentle ocean waves crashing on a sandy beach with seagulls"
}
```

## Full Request (all options)

```
{
  "prompt": "Gentle ocean waves crashing on a sandy beach with seagulls",
  "negative_prompt": "",
  "num_steps": 25,
  "duration": 8,
  "cfg_strength": 4.5,
  "mask_away_clip": false
}
```

## Response

```
{
  "request_id": "mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "QUEUED",
  "polling_url": "https://gateway.pixazo.ai/v2/requests/status/mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}
```

## Request Headers

Header

Value

Content-Type

application/json

Cache-Control

no-cache

Ocp-Apim-Subscription-Key

Your API subscription key

## Response Handling

Common status codes for MMAudio V2 Text to Audio generate request.

Code

Meaning

202

Accepted — Request queued

400

Bad Request

401

Unauthorized

403

Forbidden

404

Not Found

429

Too Many Requests

500

Internal Server Error

## Response Handling

Common status codes.

Code

Meaning

202

Accepted — Request queued

400

Bad Request

401

Unauthorized

402

Insufficient Balance

403

Forbidden

429

Too Many Requests

500

Internal Server Error

## Error Responses

Queue system errors and model validation errors.

### Queue System Errors

```
// 402 — Insufficient balance
{
  "error": "Insufficient Balance",
  "message": "Your wallet does not have enough balance."
}
```

```
// 400 — Model not found
{
  "error": "Model not found",
  "message": "Model 'mmaudio-v2-text-to-audio' not found or is disabled"
}
```

### Error via Status/Webhook

```
{
  "request_id": "mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "ERROR",
  "model_id": "mmaudio-v2-text-to-audio",
  "error": "Description of the error",
  "output": null
}
```

## Retrieving Results

Poll the universal status endpoint to check progress and retrieve results.

### Endpoint

```
GET https://gateway.pixazo.ai/v2/requests/status/{request_id}
Ocp-Apim-Subscription-Key: YOUR_API_KEY
```

## cURL Example

```
curl -H "Ocp-Apim-Subscription-Key: YOUR_API_KEY" \
  "https://gateway.pixazo.ai/v2/requests/status/mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
```

## Response (Completed)

```
{
  "request_id": "mmaudio-v2-text-to-audio_019dxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "status": "COMPLETED",
  "model_id": "mmaudio-v2-text-to-audio",
  "error": null,
  "output": {
    "media_url": [
      "https://pub-582b7213209642b9b995c96c95a30381.r2.dev/v1/mmaudio-v2-text-to-audio_019dxxxx-xxxx/output.ext"
    ],
    "media_type": "application/octet-stream"
  },
  "created_at": "2026-03-31T10:00:00.000Z",
  "updated_at": "2026-03-31T10:00:15.000Z",
  "completed_at": "2026-03-31T10:00:15.000Z"
}
```

## Response Fields

Field

Type

Description

request\_id

string

Unique request identifier

status

string

QUEUED, PROCESSING, COMPLETED, FAILED, or ERROR

model\_id

string

Model that processed the request

error

string|null

Error message if failed

output.media\_url

array

URLs to generated media (R2 CDN)

output.media\_type

string

MIME type of the output

created\_at

string

When request was created

completed\_at

string|null

When request completed

polling\_url

string

Status URL (initial response only)

## Status Values

Status

Description

QUEUED

Request accepted, waiting to be processed

PROCESSING

Being processed by the model

COMPLETED

Done — output contains the result

FAILED

Failed — check error field

ERROR

System error — not charged

## Status Flow

```
QUEUED → PROCESSING → COMPLETED
                    → FAILED
                    → ERROR
```

## Typical Workflow

1.  **Send a generate request** to the API endpoint
2.  **Save the `request_id`** from the response
3.  **Poll** every 5-10 seconds: `GET /v2/requests/status/{request_id}`
4.  **When `status` is `"COMPLETED"`**, download from `output.media_url`

**Tip:** Use `X-Webhook-URL` header to get a callback instead of polling.