---
title: "SpeechRequest"
---

Text-to-speech request input


## Fields

| Field                                                                                                         | Type                                                                                                          | Required                                                                                                      | Description                                                                                                   | Example                                                                                                       |
| ------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------- |
| `input`                                                                                                       | *str*                                                                                                         | :heavy_check_mark:                                                                                            | Text to synthesize                                                                                            | Hello world                                                                                                   |
| `model`                                                                                                       | *str*                                                                                                         | :heavy_check_mark:                                                                                            | TTS model identifier                                                                                          | mistralai/voxtral-mini-tts-2603                                                                               |
| `provider`                                                                                                    | [Optional[components.SpeechRequestProvider]](../components/speechrequestprovider.mdx)                          | :heavy_minus_sign:                                                                                            | Provider-specific passthrough configuration                                                                   |                                                                                                               |
| `response_format`                                                                                             | [Optional[components.SpeechRequestResponseFormat]](../components/speechrequestresponseformat.mdx)              | :heavy_minus_sign:                                                                                            | Audio output format                                                                                           | pcm                                                                                                           |
| `speed`                                                                                                       | *Optional[float]*                                                                                             | :heavy_minus_sign:                                                                                            | Playback speed multiplier. Only used by models that support it (e.g. OpenAI TTS). Ignored by other providers. | 1                                                                                                             |
| `voice`                                                                                                       | *str*                                                                                                         | :heavy_check_mark:                                                                                            | Voice identifier (provider-specific).                                                                         | en_paul_neutral                                                                                               |