Bitwig Studio Gemini Agent Bridge (MCP)

This project provides a direct integration bridge between Gemini (via Model Context Protocol - MCP) and Bitwig Studio (via Open Sound Control - OSC). It allows an AI agent or the Gemini client to manage, control, and monitor your Bitwig Studio projects in real-time.

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🏗️ Architecture

┌──────────────────────────┐             ┌─────────────────────────┐             ┌─────────────────────────┐
│                          │  JSON-RPC   │  Node.js MCP Server     │  OSC / UDP  │  Bitwig JS Controller   │
│  Gemini Client / IDE     │ ──────────> │                         │ ──────────> │                         │
│                          │ <────────── │  (mcp-server.js)        │ <────────── │  (AntigravityController)│
└──────────────────────────┘   (Stdio)   └─────────────────────────┘ (Ports 9000/9001) └───────────────────┘
                                                                                              │
                                                                                              │ Bitwig Controller API
                                                                                              ▼
                                                                                  ┌─────────────────────────┐
                                                                                  │  Bitwig Studio DAW      │
                                                                                  └─────────────────────────┘

The bridge consists of two main components:

1. Node.js MCP Server: Listens to Gemini commands over standard input/output, maps them to OSC messages, and sends them to Bitwig over UDP. It also starts a UDP receiver to get real-time status updates (playback, track volume, solo, mute) from Bitwig.
2. Bitwig Controller Script: A JavaScript extension loaded directly inside Bitwig Studio that opens a UDP socket (port 9000) to receive OSC commands, executes actions natively using the Bitwig Controller API, and pushes state changes back to Node.js (port 9001).

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📂 Project Structure

/home/bedri/Bitwig Studio/Projects/BitWig/
├── package.json                   # Project manifest (dependencies: node-osc)
├── package-lock.json              # Package lockfile
├── mcp-server.js                  # Node.js MCP server (Stdio JSON-RPC bridge)
├── start-mcp.sh                   # Executable launcher script
└── README.md                      # This documentation

/home/bedri/Bitwig Studio/Controller Scripts/
└── AntigravityController.control.js   # Extension script loaded by Bitwig Studio

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🚀 Setup & Activation

The project has been automatically deployed, but here are the configuration references:

1. Gemini MCP Registration

The server is registered in your local Gemini Configuration file (~/.gemini/config/mcp_config.json) under the bitwig-agent key:

"bitwig-agent": {
  "command": "node",
  "args": [
    "/home/bedri/Bitwig Studio/Projects/BitWig/mcp-server.js"
  ]
}

2. Enable in Bitwig Studio

1. Launch Bitwig Studio.
2. Open the dashboard (click the Bitwig logo at the top center) and navigate to Settings > Controllers.
3. Click Add Controller.
4. Set Vendor to Antigravity and Model to Gemini Controller Bridge.
5. The extension will automatically bind, starting the UDP servers on ports 9000 (listening) and 9001 (sending).

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🛠️ Supported Tools & Commands

Gemini is equipped with the following tools through this MCP server:

Tool Name	Parameters	Description
get_state	None	Retrieves transport play state, BPM, arranger loop status, and list of existing tracks.
play	None	Starts playback in Bitwig.
stop	None	Stops playback.
record	None	Toggles arranger recording.
toggle_loop	None	Toggles the arranger loop.
set_tempo	bpm (number)	Adjusts the project tempo (e.g. 128.5).
set_track_volume	track_index (int), volume (float 0.0 - 1.0)	Sets the volume level of a track.
set_track_pan	track_index (int), pan (float 0.0 - 1.0)	Adjusts the panning of a track (0.5 is center).
set_track_mute	track_index (int), mute (bool)	Mutes/unmutes a track.
set_track_solo	track_index (int), solo (bool)	Solos/unsolos a track.
set_track_arm	track_index (int), arm (bool)	Arms/disarms a track for recording.
launch_scene	scene_index (int)	Launches a scene by index.
undo	None	Executes native Undo.
redo	None	Executes native Redo.

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💬 Example Prompts

You can now command your DAW in natural language:

• "Start playback in Bitwig"
• "Set the project BPM to 124"
• "Mute track 2 and solo track 0"
• "Get the current tracks list and their volumes"
• "Turn arranger loop on"
• "Undo the last action"

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🔍 Troubleshooting

Flatpak Network Permissions

Because Bitwig is packaged as a Flatpak on your Linux system, it runs in a sandbox. If the OSC connection fails, grant Bitwig permission to share the host's loopback network interface by running the following command:

flatpak override --user --share=network com.bitwig.BitwigStudio