How to apply a custom voice when using the HeyGen Video Agent API?

Hello Admin team,

We’re looking to develop a feature based on the Video Agent API. However, at the moment, the API doesn’t support passing a voice through parameters. Is there any way for us to apply a specific voice to the Video Agent?

We’ve tried creating a video using an avatar and voice via the Create Avatar Video (V2) API (https://docs.heygen.com/reference/create-an-avatar-video-v2) and then passing that video into the files field of the Video Agent API, but it didn’t work.

We would greatly appreciate your guidance and look forward to your response.

Thank you very much.