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

# Voice Design llms.txt

> Machine-readable documentation index for Voice Design (Voice) — guide pages and API endpoints for AI agents and LLMs

# Telnyx Voice: Voice Design — Documentation Index

> Voice Design documentation within the Voice section of the Telnyx developer docs ([https://developers.telnyx.com](https://developers.telnyx.com)).
> Root index: [https://developers.telnyx.com/llms.txt](https://developers.telnyx.com/llms.txt) · Voice index: [https://developers.telnyx.com/development/llms/voice-llms-txt.md](https://developers.telnyx.com/development/llms/voice-llms-txt.md) · Full content for this subsection: [https://developers.telnyx.com/development/llms/voice-voice-design-llms-full-txt.md](https://developers.telnyx.com/development/llms/voice-voice-design-llms-full-txt.md)

##

* [Overview](https://developers.telnyx.com/docs/voice/voice-design-lab.md): Create custom voices from text descriptions or audio recordings, then use them across all Telnyx voice products.

## Design a Voice

* [Overview](https://developers.telnyx.com/docs/voice/voice-design-lab/design-voice/concepts.md): Use AI to generate voices from natural language descriptions — understand the concepts, then create one via the portal or API.
* [Quickstart](https://developers.telnyx.com/docs/voice/voice-design-lab/design-voice/quickstart.md): Create a custom synthetic voice step-by-step using the Telnyx Voice Design portal or API, including prompts, reference audio, and provider selection.
* [Parameters](https://developers.telnyx.com/docs/voice/voice-design-lab/design-voice/api-details.md): Provider differences and generation parameters for the Voice Design API.
* [Prompting Guide](https://developers.telnyx.com/docs/voice/voice-design-lab/design-voice/prompting-guide.md): Write voice descriptions that produce consistent, high-quality results — format templates, dimension guides, and common pitfalls.

## Clone from Audio

* [Overview](https://developers.telnyx.com/docs/voice/voice-design-lab/clone-voice/concepts.md): Clone a voice from a short audio recording — capture a speaker's identity from a sample.
* [Quickstart](https://developers.telnyx.com/docs/voice/voice-design-lab/clone-voice/quickstart.md): Clone a voice step-by-step — upload a file, record in the browser, or use the API.
* [Parameters](https://developers.telnyx.com/docs/voice/voice-design-lab/clone-voice/parameters.md): Models, audio requirements, and async flows for the Voice Clone API.
* [Responses](https://developers.telnyx.com/docs/voice/voice-design-lab/clone-voice/responses.md): Reference for the Voice Clone API response, including the voice ID format, status fields, sample audio URLs, and timestamps returned for each clone.
* [Errors](https://developers.telnyx.com/docs/voice/voice-design-lab/clone-voice/errors.md): Reference for error codes returned by the Telnyx Voice Clone API, including general errors and provider-specific failures with troubleshooting tips.

## Using Custom Voices

* [Using Custom Voices](https://developers.telnyx.com/docs/voice/voice-design-lab/using-custom-voices.md): Use your custom voice clones across AI Assistants, Call Control, and the TTS API.

## API Reference (Voice Design)

### Voice Designs

* [List voice designs](https://developers.telnyx.com/api-reference/voice-designs/list-voice-designs.md): Returns a paginated list of voice designs belonging to the authenticated account.
* [Create or add a version to a voice design](https://developers.telnyx.com/api-reference/voice-designs/create-or-add-a-version-to-a-voice-design.md): Creates a new voice design (version 1) when `voice_design_id` is omitted. When `voice_design_id` is provided, adds a new version to the existing design instead…
* [Get a voice design](https://developers.telnyx.com/api-reference/voice-designs/get-a-voice-design.md): Returns the latest version of a voice design, or a specific version when `?version=N` is provided. The `id` parameter accepts either a UUID or the design name.
* [Rename a voice design](https://developers.telnyx.com/api-reference/voice-designs/rename-a-voice-design.md): Updates the name of a voice design. All versions retain their other properties.
* [Delete a voice design](https://developers.telnyx.com/api-reference/voice-designs/delete-a-voice-design.md): Permanently deletes a voice design and all of its versions. This action cannot be undone.
* [Download voice design audio sample](https://developers.telnyx.com/api-reference/voice-designs/download-voice-design-audio-sample.md): Downloads the WAV audio sample for the voice design. Returns the latest version's sample by default, or a specific version when `?version=N` is provided. The \`…
* [Delete a specific version of a voice design](https://developers.telnyx.com/api-reference/voice-designs/delete-a-specific-version-of-a-voice-design.md): Permanently deletes a specific version of a voice design. The version number must be a positive integer.

### Voice Clones

* [List voice clones](https://developers.telnyx.com/api-reference/voice-clones/list-voice-clones.md): Returns a paginated list of voice clones belonging to the authenticated account.
* [Create a voice clone from a voice design](https://developers.telnyx.com/api-reference/voice-clones/create-a-voice-clone-from-a-voice-design.md): Creates a new voice clone by capturing the voice identity of an existing voice design. The clone can then be used for text-to-speech synthesis.
* [Create a voice clone from an audio file upload](https://developers.telnyx.com/api-reference/voice-clones/create-a-voice-clone-from-an-audio-file-upload.md): Creates a new voice clone by uploading an audio file directly. Supported formats: WAV, MP3, FLAC, OGG, M4A. For best results, provide 5–10 seconds of clear spe…
* [Update a voice clone](https://developers.telnyx.com/api-reference/voice-clones/update-a-voice-clone.md): Updates the name, language, or gender of a voice clone.
* [Delete a voice clone](https://developers.telnyx.com/api-reference/voice-clones/delete-a-voice-clone.md): Permanently deletes a voice clone. This action cannot be undone.
* [Download voice clone audio sample](https://developers.telnyx.com/api-reference/voice-clones/download-voice-clone-audio-sample.md): Downloads the WAV audio sample that was used to create the voice clone.