# Picking a voice Picking a voice for your ConversationRelay application is an important step towards creating an engaging user experience. Twilio supports text-to-speech voices from Google, Amazon Polly, and ElevenLabs. Text-to-Speech (TTS) voice quality varies significantly by provider and voice type. While generative voices often offer higher fidelity and more natural-sounding responses, they can introduce additional latency and process TTS at a slower rate. If your workflow is subject to PCI, please note that not all TTS and transcription providers are guaranteed to be PCI compliant. Refer to [Twilio's Responsibility Matrix](https://www.twilio.com/en-us/pci-compliance) for further information. ## Google and Amazon Polly voices For voices from Google or Amazon (including generative options), refer to our [Twilio TTS Voices documentation](/docs/voice/twiml/say/text-speech#available-voices-and-languages). Each provider offers a variety of languages and styles, enabling you to tailor your application's voice experience to your specific needs. ### How to use Google and Amazon Polly voices 1. Browse the available voices in the [Available voices and languages](/docs/voice/twiml/say/text-speech#available-voices-and-languages) table. Test them using the [Twilio Console](/us1/develop/voice/settings/text-to-speech) to find the one that best fits your application's requirements. 2. Copy the voice ID from the table (for example, `en-US-Wavenet-D`). 3. Configure the [`` noun](/docs/voice/twiml/connect/conversationrelay) in TwiML: Set `ttsProvider` to `Google` or `Amazon` and use the copied voice ID in the `voice` attribute. ## ElevenLabs voices ElevenLabs uses the Flash 2.5 model by default for text-to-speech. Use the interface below to search and filter through a wide selection of ElevenLabs voices by language, accent, age, and more. Each voice entry includes a voice ID that you can copy and paste into your `` configuration. ### How to use ElevenLabs voices 1. **Search or filter**: Pick a voice using the tool below that matches your requirements. 2. **Copy the voice ID**: From the search results, copy the voice ID (for example, `NYC9WEgkq1u4jiqBseQ9`). 3. **Configure the [`` noun](/docs/voice/twiml/connect/conversationrelay)**: In your TwiML, set `ttsProvider="ElevenLabs"` and use the copied voice ID in the `voice` attribute. 4. **Pick an audio model (optional)**: The voices from ElevenLabs use the [Flash 2.5 model](https://elevenlabs.io/docs/models#flash-v25) by default. Other models are available and could improve the quality or performance of your application depending on your use case. You can use a different model by appending a hyphen to the voice ID followed by the model ID. The supported model IDs include `flash_v2`, `turbo_v2_5`, `turbo_v2` and the default, `flash_v2_5`. Some models only work with a specific set of languages. You can learn about the strengths and the supported languages of each model [on the ElevenLabs website](https://elevenlabs.io/docs/models#models-overview). 5. **Customize your ElevenLabs voice (recommended)**: You can adjust the `speed` and other characteristics of your chosen ElevenLabs voice. To do that, add a hyphen to the end of the `voice` attribute followed by an underscore-separated string with values for `speed`, `stability`, and `similarity` respectively. The `speed` should be a value between 0.7 and 1.2 and the `stability` and `similarity` values can range from 0.0 to 1.0. For example, a `voice` attribute of `XrExE9yKIg1WjnnlVkGX-1.2_0.6_0.8` will set the speed to `1.2`, the `stability` to `0.6`, and the `similarity` to `0.8`. See [the ElevenLabs documentation](https://elevenlabs.io/docs/product-guides/playground/text-to-speech#speed) to learn more about how these settings affect your application's voice. **Example**: ```xml ``` ## Default voice settings If you don't explicitly specify the voice attribute in your `` configuration, ConversationRelay automatically applies a default voice based on the language setting (as defined by the language or ttsLanguage attribute) and the selected TTS provider (default is ElevenLabs). Below is the complete list of default voice settings: | Language | Voice ID | TTS provider | Speech model | Transcription provider | | -------- | -------------------- | ------------ | ------------ | ---------------------- | | bg-BG | AB9XsbSA4eLG12t2myjN | ElevenLabs | long | Google | | cs-CZ | uYFJyGaibp4N2VwYQshk | ElevenLabs | long | Google | | da-DK | ygiXC2Oa1BiHksD3WkJZ | ElevenLabs | long | Google | | de-DE | FTNCalFNG5bRnkkaP5Ug | ElevenLabs | telephony | Google | | en-AU | 9Ft9sm9dzvprPILZmLJl | ElevenLabs | telephony | Google | | en-GB | Fahco4VZzobUeiPqni1S | ElevenLabs | telephony | Google | | en-IN | mCQMfsqGDT6IDkEKR20a | ElevenLabs | long | Google | | en-US | UgBBYS2sOqTuMpoF3BR0 | ElevenLabs | telephony | Google | | es-ES | 6xftrpatV0jGmFHxDjUv | ElevenLabs | telephony | Google | | es-US | CaJslL1xziwefCeTNzHv | ElevenLabs | telephony | Google | | fi-FI | 6xPz2opT0y5qtoRh1U1Y | ElevenLabs | long | Google | | fr-CA | IPgYtHTNLjC7Bq7IPHrm | ElevenLabs | telephony | Google | | fr-FR | a5n9pJUnAhX4fn7lx3uo | ElevenLabs | telephony | Google | | hi-IN | IvLWq57RKibBrqZGpQrC | ElevenLabs | long | Google | | hu-HU | TumdjBNWanlT3ysvclWh | ElevenLabs | long | Google | | id-ID | 1k39YpzqXZn52BgyLyGO | ElevenLabs | long | Google | | it-IT | uScy1bXtKz8vPzfdFsFw | ElevenLabs | telephony | Google | | ja-JP | 3JDquces8E8bkmvbh6Bc | ElevenLabs | telephony | Google | | kn-IN | kn-IN-Standard-A | Google | long | Google | | ko-KR | uyVNoMrnUku1dZyVEXwD | ElevenLabs | telephony | Google | | ml-IN | ml-IN-Standard-A | Google | long | Google | | mr-IN | mr-IN-Standard-A | Google | long | Google | | nl-BE | s7Z6uboUuE4Nd8Q2nye6 | ElevenLabs | telephony | Google | | nl-NL | UNBIyLbtFB9k7FKW8wJv | ElevenLabs | telephony | Google | | pl-PL | W0sqKm1Sfw1EzlCH14FQ | ElevenLabs | long | Google | | pt-BR | CstacWqMhJQlnfLPxRG4 | ElevenLabs | telephony | Google | | pt-PT | TsZfI8Nbn2Xd7ArC76n9 | ElevenLabs | telephony | Google | | ro-RO | OlBp4oyr3FBAGEAtJOnU | ElevenLabs | long | Google | | ru-RU | AB9XsbSA4eLG12t2myjN | ElevenLabs | long | Google | | sv-SE | 4xkUqaR9MYOJHoaC1Nak | ElevenLabs | long | Google | | ta-IN | ZhJ5LanYnCmLKQUXvsV7 | ElevenLabs | long | Google | | te-IN | te-IN-Standard-A | Google | long | Google | | th-TH | th-TH-Standard-A | Google | long | Google | | tr-TR | IuRRIAcbQK5AQk1XevPj | ElevenLabs | long | Google | | uk-UA | nCqaTnIbLdME87OuQaZY | ElevenLabs | long | Google | | vi-VN | foH7s9fX31wFFH2yqrFa | ElevenLabs | long | Google | Our internal configuration defines these default settings and updates them periodically. Refer to the Twilio [Twilio TTS Voices documentation](/docs/voice/twiml/say/text-speech#available-voices-and-languages) for a complete and current list of supported languages, default voices, and detailed settings.