### Answer Voice accent inconsistency is typically related to the

voice_temperature

setting and TTS provider behavior. Here's how to address it: ## Lower Your Voice Temperature The

voice_temperature

parameter controls voice stability. Higher values (up to 2) create more variant speech generation, while lower values (closer to 0) produce more stable, consistent speech. [(1) ]() Try reducing your

voice_temperature

to a lower value like 0.5 or 0.7 to increase accent stability. [(2) ]() ## Configuration Options to Adjust You can update these settings via the API: [(1) ]() - **`voice_temperature`**: Set to a lower value (e.g., 0.5-0.7) for more consistent accent - **`voice_speed`**: Adjust the speech rate (values from 0.5 to 2) which can also affect pronunciation consistency ## TTS Fallback Behavior Accent shifts can also occur when your primary TTS provider experiences issues and Retell falls back to an alternative provider. For example, if ElevenLabs has an outage, the system may fall back to OpenAI TTS, which could produce a different accent. [(3) ]() You can configure

fallback_voice_ids

to specify which voices to use as backups, helping maintain accent consistency even during provider issues. [(1) ]() ## Additional Option For the most consistent accent, consider using voice cloning with a native speaker of your desired accent. [(4) ]() Check out these potentially useful sources: [Upda

te Voice Agent]() , [Voice inconsistency - stuttering and filler sounds]()

​ To learn more, see the sources I considered: [[1] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) [[2] Voice inconsistency - stuttering and filler sounds (aaaa, ehhh, hmmm)?](https://community.retellai.com/t/voice-inconsistency-stuttering-and-filler-sounds-aaaa-ehhh-hmmm/769) [[3] Discord message from @martram3246 on 2025-05-14](https://discord.com/channels/1186424376300679209/1186462578310910112/1372249906571513929) [[4] Issues with Portuguese (PT-PT) Voice Agent: Latency, Audio Recognition, and Email Capture](https://community.retellai.com/t/issues-with-portuguese-pt-pt-voice-agent-latency-audio-recognition-and-email-capture/711) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

​ To learn more, see the sources I considered: [[1] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) [[2] Get Voice Agent](https://docs.retellai.com/api-references/get-agent) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer I don't have specific information in the available sources about how Retell AI selects or curates which ElevenLabs voices to offer in their platform. What the documentation does indicate is that you can find the list of available voices and their previews in the Dashboard. [(1) ]() [(2) ]() The

voice_id

parameter references these available voices (e.g.,

"11labs-Adrian"

) . For ElevenLabs voices specifically, you can also select different voice models like

eleven_turbo_v2

,

eleven_flash_v2

,

eleven_turbo_v2_5

,

eleven_flash_v2_5

, or

eleven_multilingual_v2

. Check out these potentially useful sources: [Create Voice Agent]() , [Get Voice Agent]() For details on voice selection criteria or to request additional voices, I'd recommend reaching out to the team directly.