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

# TTS (Text to Speech)

> Call /audio/speech with the TypeScript SDK.

**Method**: `client.generateSpeech()`.

### Example

```typescript theme={null}
const audio = await client.generateSpeech({
  model: "openai/gpt-4o-mini-tts",
  input: "Hello world",
  voice: "alloy",
  response_format: "mp3",
});
```

### Key parameters

* `model` (required): TTS-capable model id.
* `input` (required): Text to synthesize.
* `voice`: Provider-normalized voice alias (recommended) or provider-native voice value.
* `response_format`: `mp3`, `wav`, `flac`, etc.
* `speed`: Playback speed multiplier (typically 0.25-4).

If `voice` is not valid for the routed provider/model mapping, the API returns `400` with `param: "voice"`.

### Provider config examples

```typescript theme={null}
// ElevenLabs explicit override
await client.generateSpeech({
  model: "eleven-labs/eleven-v3",
  input: "Hello from ElevenLabs",
  voice: "rachel",
  config: {
    elevenlabs: {
      voice_id: "21m00Tcm4TlvDq8ikWAM"
    }
  }
});

// Google explicit override
await client.generateSpeech({
  model: "google/gemini-2.5-flash-preview-tts",
  input: "Hello from Gemini",
  voice: "kore",
  config: {
    google: {
      voice_name: "Kore"
    }
  }
});
```

### Returns

Audio binary (Blob)