---
title: ToolRouter — Agent Use Case Guide
description: Step-by-step guide for completing a task with a specific AI agent using ToolRouter.
url: https://toolrouter.com/tools/audio-dubber/use-cases/replace-product-demo-voiceover/chatgpt
---
# How to Replace Product Demo Voiceover with ChatGPT

ChatGPT helps you rethink demo narration strategically, not just replace it. Before generating the new voiceover, it can rewrite your script for clarity and impact, suggest voice styles that match your brand personality, and generate A/B versions for testing. The result is a complete demo refresh, not just a voice swap.

## Setup

{"mcpServers":{"toolrouter":{"command":"npx","args":["-y","toolrouter-mcp"]}}}

## Steps

1. Configure ToolRouter in ChatGPT
2. Ask: "Replace the voiceover on this demo video with the updated script"
3. ChatGPT processes the video through dub_audio with the new narration
4. Request adjustments to voice style or pacing as needed
5. Ask for translated versions for your international demo library

## Example Prompt

```
Replace the narration on our onboarding demo. Here is the updated script. Keep a friendly, professional tone.
```

## Tips

- ChatGPT can help you rewrite the demo script before generating the voiceover
- Ask for A/B versions with different voice styles to test audience preference
- Request a transcript of the final dubbed version for subtitle generation
