# Lightricks LTX 2.3 Pro Audio to Video API

> Ltx 2.3 Pro Audio To Video by Lightricks - advanced AI model for audio-to-video. Delivers high-quality results with fast inference, suitable for both creative and production workflows.

Source: https://www.sandbase.ai/models/lightricks/ltx-2.3-pro/audio-to-video
API reference: https://www.sandbase.ai/models/lightricks/ltx-2.3-pro/audio-to-video/docs

## Facts

- Provider: Lightricks
- Type: Video model
- Model ID: `lightricks/ltx-2.3-pro/audio-to-video`
- Price: From $0.50 per run
- Capabilities: audio to video
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Unified Run API: `POST https://api.sandbase.ai/v1/run`

```bash
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "lightricks/ltx-2.3-pro/audio-to-video",
  "audio": "https://static.sandbase.ai/examples/lightricks/ltx-2.3-pro/audio-to-video/output_url_1.mp3",
  "image": "https://static.sandbase.ai/examples/lightricks/ltx-2.3-pro/audio-to-video/input_image_0.png",
  "prompt": "A woman whispering to the microphone"
}'
```

The response returns a run id; poll `GET https://api.sandbase.ai/v1/run/{id}` until the status is `completed` or `failed`.

## FAQ

### How do I call Lightricks LTX 2.3 Pro Audio to Video through SandBase?

Create a SandBase API key, then send requests with the model ID "lightricks/ltx-2.3-pro/audio-to-video" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### Do I need a separate Lightricks account?

No. One SandBase API key and balance gives you access to Lightricks LTX 2.3 Pro Audio to Video and the other models in the catalog; you do not need to sign up with Lightricks separately.

## README

### LTX 2.3 Pro Audio to Video

LTX 2.3 Pro audio-to-video: animate an image into a video that follows an audio track, such as a voice or song.

#### Fields

| Field | Type | Default | Notes |
|---|---|---|---|
| `prompt` | string, required | — | Up to 5,000 characters. |
| `image` | image URL, required | — | Image to animate. JPEG, PNG, or WebP URL. |
| `audio` | audio URL, required | — | Audio that drives the video. |
| `aspect_ratio` | `16:9` / `9:16` | — | Output frame shape. |

#### Billing

$0.10 per output second; the output is as long as the audio. The quote before submission assumes 5 seconds.

| Audio | Price |
|---|---|
| 5s audio | $0.50 |
| 10s audio | $1.00 |
| 20s audio | $2.00 |

Failed runs are not charged.

#### Prompting

- Describe the scene and motion; timing follows the audio.

#### Also on SandBase

Other LTX 2.3 endpoints: `lightricks/ltx-2.3-pro/text-to-video`, `lightricks/ltx-2.3-pro/image-to-video`, `lightricks/ltx-2.3-pro/retake`, `lightricks/ltx-2.3-pro/video-extend`.