How to Modify Voice Pitch with Claude
Change voice pitch with Claude and ToolRouter. Natural pitch adjustment without artifacts.
Tool
Claude makes pitch adjustment an iterative conversation in your terminal. Describe what you want -- "more authoritative" or "sounds about 10 years younger" -- and Claude translates that into precise pitch parameters. It asks clarifying questions about formant preservation and naturalness, then lets you fine-tune with conversational feedback like "a touch deeper" until the result is perfect.
Connect ToolRouter to Claude
1Go to Settings → Connectors → Add custom connector
2Enter the details below and click Add
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Done — works on Claude chat, desktop, and mobile
Steps
Once connected (see setup above), use the Voice Transformer tool:
- Ask Claude: "Lower the pitch of this voice recording using voice-transformer" and provide the file
- Claude adjusts the pitch while preserving natural speech quality
- Request: "A bit deeper" or "Not quite that much -- bring it up slightly"
- Download the pitch-adjusted recording
Example Prompt
Try this with Claude using the Voice Transformer tool
Lower the pitch of this narration by about 15% to give it more authority and gravitas. Keep the timing and natural speech quality intact.
Tips
- Small pitch adjustments (10-20%) produce the most natural results
- Ask Claude to preserve formant structure so the voice sounds natural, not processed
- Test multiple pitch levels to find the sweet spot between original and target