Moog Sub37 MCP

A Model Context Protocol (MCP) server that allows Claude and other MCP-compatible LLMs to interact with and control the Moog Sub37/Subsequent37 analog synthesizer via MIDI. This integration enables AI-assisted sound design and parameter control of this legendary Moog synthesizer.

About the Moog Sub37/Subsequent37

The Moog Sub37/Subsequent37 is a powerful analog synthesizer featuring:

• 2 oscillators with sub oscillators
• Classic Moog ladder filter
• Dual LFOs
• Extensive modulation options
• 256 preset memory
• 37-key keyboard with velocity and aftertouch
• Mono and Duo (paraphonic) modes
• Built-in arpeggiator and step sequencer

Prompt Examples

"Design a deep, resonant bass patch using the Moog filter's self-oscillation"
"Create an evolving pad sound using both oscillators in Duo mode"
"Program a sequence that showcases the Sub37's classic Moog lead sound"
"Design a dark atmospheric sound using the Sub37's modulation capabilities"
"Create a punchy bass sound perfect for techno using the multidrive circuit"

Features

• Complete MIDI control interface for all Sub37/Subsequent37 parameters
• Support for both Sub37 and Subsequent37 models
• Access to all synthesis parameters:
  • Oscillator controls (waveform, pitch, sync)
  • Filter controls (cutoff, resonance, envelope amount)
  • Envelope generators
  • LFO settings
  • Modulation routing
  • Arpeggiator/Sequencer parameters
• Preset management
• Real-time parameter automation

Demo

Watch Claude control the Moog Sub37/Subsequent37 in real-time:

Installation and Usage

Prerequisites

• Python 3.12+
• uv for package management
• A Moog Sub37 or Subsequent37 synthesizer connected via USB
• Claude Desktop app (for full integration)

Installing Dependencies

uv is mandatory for this project. Start by installing it:

For macOS:

brew install uv

For Windows:

Follow the instructions here

Installing with Claude Desktop

To use with Claude AI, add the MCP server configuration in Claude Desktop:

⚠️ Important: You don't need to clone the repository or install the packages manually. The MCP server is published on PyPI and can be installed automatically.

Go to Claude > Settings > Developer > Edit Config > claude_desktop_config.json to include the following:

{
  "mcpServers": {
    "Sub37": {
      "command": "uvx",
      "args": ["moog-sub37-mcp"]
    }
  }
}

Architecture

The MCP server is designed to provide comprehensive control over the Sub37/Subsequent37:

• Parameter Control: Direct access to all synthesizer parameters via MIDI CC messages
• Preset Management: Load, save, and modify presets
• Real-time Control: Immediate response to parameter changes
• MIDI Implementation: Complete MIDI specification support
• Error Handling: Robust error handling for MIDI communication

Implementation Details

This library leverages:

• FastMCP: For exposing synth controls to LLMs
• Pydantic Models: For parameter validation and type safety
• mido: For reliable MIDI communication with the synthesizer
• Dynamic Versioning: Automatic version management for releases

Use Cases

• AI-Assisted Sound Design: Let Claude help you create new sounds and explore the synth's capabilities
• Automated Parameter Control: Program complex parameter changes for evolving sounds
• Preset Management: Organize and modify your preset library
• Live Performance: Control the synth in real-time with AI assistance
• Educational Tool: Learn about synthesis through interactive AI guidance

Community and Support

• Join our Discord community for help and discussion
• Visit synthgenie.com for the web-based version (API key available for free on Discord)
• Report issues and contribute on GitHub

License

MIT License - See LICENSE file for details