### Answer Yes, you can control the agent's volume using the

volume

parameter. [(1) ]() This setting controls the volume of the agent with a value ranging from

[0,2]

. A lower value means quieter agent speech, while a higher value means louder agent speech. If unset, the default value of

1

will apply. To make the agent speak louder, you would set the

volume

to a value greater than

1

(up to

2

) . However, this is a configuration setting that you would adjust when creating or updating the agent via the API—it's not something the agent can dynamically change mid-call based on a user's request. [(2) ]() [(3) ]() If you need the agent to respond to user requests to speak louder during a call, you would need to implement custom logic using tool calling to update the agent configuration or handle it through your own backend.

​ To learn more, see the sources I considered: [[1] Get Voice Agent](https://docs.retellai.com/api-references/get-agent) [[2] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) [[3] 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.

### Answer Yes, you can adjust the volume for a specific call using agent overrides when initiating the call. [(1) ]() When making an outbound call, you can use the

agent_override

parameter to apply per-call overrides without changing the saved agent configuration. Here's an example:

javascript
const registerCallResponse = await retell.call.createPhoneCall({
  from_number: '+14157774444',
  to_number: '+12137774445',
  agent_override: {
    agent: {
      voice_speed: 1.1,
      enable_backchannel: true,
    },
  },
}) ;

The

volume

parameter accepts a value ranging from `[0,2]`—lower values mean quieter speech, higher values mean louder speech, with a default of

1

. [(2) ]() So you could set

volume: 1.5

(or up to

2

) in the

agent_override.agent

object to make the agent speak louder for that specific call. For dynamically changing volume mid-call based on a user's request, you would need to implement custom function calling logic that triggers your backend to update the call or agent settings. [(2) ]()

​ To learn more, see the sources I considered: [[1] Outbound Calls (Make Calls)](https://docs.retellai.com/deploy/outbound-call) [[2] Update Voice Agent](https://docs.retellai.com/api-references/update-agent) ​

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