---
title: "Convert text to speech using a named built-in preset voice, with optional emotion and language settings. Both text and voice_preset_id are required and the text is limited to 1000 characters; invalid input returns HTTP 400. Synchronous: the call blocks until generation finishes and returns a single audio result containing a URL; there is no separate polling step. Credits are charged on success. Use this when you want a ready-made catalog voice and do not need to supply your own sample; use createSpeech to clone a voice from an audio sample instead, and createVoice to design a new voice from a text description. Pass an optional request_id to tag the result so you can locate it later via getAudioResults. Requires an API key (user scope)."
method: POST
path: "/audio/speech-preset"
tags: ["Audio"]
---

# Convert text to speech using a named built-in preset voice, with optional emotion and language settings. Both text and voice_preset_id are required and the text is limited to 1000 characters; invalid input returns HTTP 400. Synchronous: the call blocks until generation finishes and returns a single audio result containing a URL; there is no separate polling step. Credits are charged on success. Use this when you want a ready-made catalog voice and do not need to supply your own sample; use createSpeech to clone a voice from an audio sample instead, and createVoice to design a new voice from a text description. Pass an optional request_id to tag the result so you can locate it later via getAudioResults. Requires an API key (user scope).

`POST /audio/speech-preset`

## Request body

- GenerateSpeechPresetPayload — Payload for text-to-speech generation using a voice preset
  - `text` string, required — Text to convert to speech (max 100 words).
  - `voice_preset_id` string, required — Voice preset identifier.
  - `emotion` string — Emotion to apply to the speech.
  - `language` string — Language code for the speech.
  - `request_id` string — Optional client-provided identifier for this request. Use this to retrieve results later via the results endpoint.

## Response `200`

Success

- AudioResult
  - `url` string — URL to the generated audio file
  - `type` string
  - `duration` number, float
  - `request_id` string
  - `created_at` integer

## Other responses

- `400` — Error

---

[API](https://skmtc.net/ludo/apis/ludo-ai-api.md) · [All operations](https://skmtc.net/ludo/apis/ludo-ai-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/ludo/ludo-ai-api/revisions/3af866d68651/schema)