> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apimart.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Lyria 3.5 生成音乐

> 使用 Lyria 3.5 进行 Flow Music 文字生成音乐，支持风格提示词、歌词、BPM 和时长控制

```bash cURL theme={null}
curl --request POST \
  --url https://api.apimart.ai/v1/music/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "flowmusic",
    "version": "lyria-3.5",
    "title": "My Song",
    "sound_prompt": "upbeat pop music with piano",
    "bpm": "120",
    "length": 60
  }'
```

```python Python theme={null}
import requests

url = "https://api.apimart.ai/v1/music/generations"

payload = {
    "model": "flowmusic",
    "version": "lyria-3.5",
    "title": "My Song",
    "sound_prompt": "upbeat pop music with piano",
    "bpm": "120",
    "length": 60
}

headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript JavaScript theme={null}
const url = "https://api.apimart.ai/v1/music/generations";

const payload = {
  model: "flowmusic",
  version: "lyria-3.5",
  title: "My Song",
  sound_prompt: "upbeat pop music with piano",
  bpm: "120",
  length: 60
};

const headers = {
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
};

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

```json 200 theme={null}
{
  "code": 200,
  "data": [
    {
      "status": "submitted",
      "task_id": "task_01K8AYYM6R03TGZ3Q2P0TZVNPX"
    }
  ]
}
```

```json 400 theme={null}
{
  "error": {
    "message": "sound_prompt and lyrics cannot both be empty",
    "type": "invalid_request",
    "param": "",
    "code": "invalid_request"
  }
}
```

```json 403 theme={null}
{
  "error": {
    "message": "余额不足",
    "type": "invalid_request",
    "param": "",
    "code": "quota_not_enough"
  }
}
```

```json 429 theme={null}
{
  "error": {
    "message": "当前分组容量饱和，请稍后重试",
    "type": "rate_limit_error",
    "param": "",
    "code": "rate_limit_error"
  }
}
```

## 认证

**Authorization** `string` *required*

所有接口均需要使用 Bearer Token 进行认证

获取 API Key：

访问 [API Key 管理页面](https://apimart.ai/keys) 获取您的 API Key

使用时在请求头中添加：

```
Authorization: Bearer YOUR_API_KEY
```

## 请求参数

**model** `string` *required*

模型名称，**固定传 `"flowmusic"`**（大小写不敏感）

**version** `string` *required*

模型版本，固定传 `"lyria-3.5"`

> [!NOTE]
>
> Lyria 3.5 仍使用 `flowmusic` 作为模型名，不要将 `model` 改为 `lyria-3.5` 或 `flowmusic-lyria-3.5`。

**sound\_prompt** `string`

音乐风格或声音描述提示词

示例：`"upbeat pop music with piano"`

> [!NOTE]
>
> `sound_prompt` 与 `lyrics` **不可同时为空**（至少传一个）。每次请求仅生成一首音乐。

**lyrics** `string`

歌词文本，可先用[生成歌词](/cn/api-reference/audios/flow-music/lyrics.md)接口获得后回填

示例：`"[Verse 1]\n黑夜再长也会天亮\n..."`

**title** `string`

生成音乐标题

**bpm** `string`

BPM（每分钟节拍数），必须 ≥ 1

示例：`"120"`

**length** `integer`

生成时长（秒）

支持范围：`1` \~ `240` 秒

**seed** `string`

随机种子，用于复现结果

> [!NOTE]
>
> 相同的请求下传相同的 seed 值，会生成类似的结果，但不保证完全一致。

## 响应

**code** `integer`

响应状态码，成功时为 200

**data** `array`

返回数据数组

**数组元素**

**status** `string`

任务状态，初始提交时为 `submitted`

**task\_id** `string`

任务唯一标识符，用于查询任务状态和结果

## 使用场景

### 场景 1：纯风格提示词生成

```json theme={null}
{
  "model": "flowmusic",
  "version": "lyria-3.5",
  "title": "My Song",
  "sound_prompt": "upbeat pop music with piano",
  "bpm": "120",
  "length": 60
}
```

### 场景 2：歌词 + 风格成曲

```json theme={null}
{
  "model": "flowmusic",
  "version": "lyria-3.5",
  "title": "坚持",
  "lyrics": "[Verse 1]\n黑夜再长也会天亮\n...",
  "sound_prompt": "energetic rock with electric guitar",
  "length": 120
}
```

> [!NOTE]
>
> **查询任务结果**
>
> 音乐生成为异步任务，提交后会返回 `task_id`。使用 [获取任务状态](/cn/api-reference/audios/flow-music/query.md) 接口查询生成进度和结果。

## 任务完成结果示例

**查询返回示例**（`GET /v1/music/tasks/{task_id}`）：

```json theme={null}
{
  "code": 200,
  "data": {
    "id": "task_01KWXVB61E28THHFBSYXWA4FAJ",
    "status": "completed",
    "progress": 100,
    "created": 1783413184,
    "completed": 1783413236,
    "actual_time": 52,
    "cost": 0.048,
    "credits_cost": 0.48,
    "result": {
      "music": [
        {
          "clip_id": "a41aade4-993e-4d28-b56f-d97e7ef7167c",
          "title": "Regression Song",
          "duration_seconds": "181.70666667",
          "create_time": "2026-07-07T08:33:32.854073Z",
          "lyrics": "[Verse 1]\nWaking up to the morning light,\n...",
          "lyrics_id": "c302d603-81b6-552f-8122-e512928d6aa1",
          "lyrics_timing_markers": [[10, 12], [212, 36]],
          "audio_url": "https://cdn.apimart.ai/audio/flowmusic_a41aade4.m4a",
          "wav_url": "https://cdn.apimart.ai/audio/flowmusic_a41aade4.wav",
          "image_url": "https://cdn.apimart.ai/image/flowmusic_a41aade4_cover.jpg"
        }
      ]
    }
  }
}
```


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