---
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/video-editor/use-cases/add-background-music/claude
---
# How to Add Background Music with Claude

Claude manages audio mixing as a multi-step conversation in your terminal. Specify volume levels, ducking behavior, and fade parameters through natural dialogue, then refine the mix by adjusting specific moments that need attention. Claude handles the technical details of audio balancing while you focus on describing how the final mix should feel.

## Setup

claude mcp add toolrouter -- npx -y toolrouter-mcp

## Steps

1. Connect ToolRouter: claude mcp add toolrouter -- npx -y toolrouter-mcp
2. Provide your video and audio: "Add this background track to my product demo video"
3. Claude layers the music using edit_footage with auto-balanced levels
4. Adjust the mix: "Lower the music volume during the speaking parts and add a fade-out at the end"
5. Finalize: "Export the final video with finalize_video"

## Example Prompt

```
Add background music to my 3-minute product demo. Use the provided ambient track. Duck the music to 20% during voiceover sections and bring it to 80% during visual-only transitions. Fade in over 2 seconds, fade out over 3.
```

## Tips

- Specify volume levels as percentages for precise control over the mix
- Ask Claude to auto-detect speech sections for intelligent music ducking
- Always add fade-in and fade-out to avoid abrupt music starts and stops
