### Answer \To prevent your voice agent from switching accents mid-call, you can configure the

voice_temperature

parameter, which controls voice stability. [(1) ]() [(2) ]() Lower values make the voice more stable and consistent, while higher values introduce more variation in speech generation. The value ranges from 0 to 2, with a default of 1. To reduce accent switching, set

voice_temperature

to a lower value (closer to 0) :

javascript
const agentResponse = await client.agent.update('your_agent_id', {
  voice_temperature: 0.5
}) ;

[(1) ]() Additionally, ensure you've selected an appropriate

voice_id

and

voice_model

for your use case, as different TTS providers and models have varying levels of consistency. [(1) ]() [(2) ]() You can also configure

fallback_voice_ids

to maintain consistency even during TTS provider outages.

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

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