MIDI Clock

A simple, lightweight MIDI Clock application for macOS that allows you to synchronize all your MIDI devices without opening a DAW.

Features

• Send MIDI clock signals to all connected MIDI devices automatically
• Support for both standard MIDI and MIDI over USB devices
• Adjustable BPM (30-300)
• Start, stop, and reset controls
• Virtual port for connecting to all devices at once
• Toggle individual devices on/off
• Keyboard shortcuts (Space to start/stop)
• Visual pulse feedback
• Plug-and-play: opens ready to use with all devices connected

Screenshots

Requirements

• macOS
• Node.js 14 or higher (for development only)

Quick Start

1. Download the MIDI Clock.dmg file from the releases
2. Mount the DMG and drag the app to your Applications folder
3. Double-click to launch - all your MIDI devices will be connected automatically
4. Set your BPM and click Start to begin

Development

Installation

1. Clone this repository
2. Run npm install to install dependencies
3. Run npm start to start the application in development mode

Building from Source

To build the application from source:

# Install dependencies
npm install

# Rebuild native modules for Electron
npx @electron/rebuild

# Build the application
npm run build

The built application will be available in the dist folder.

Usage

1. Launch the application - all MIDI devices will be connected automatically
2. Adjust the BPM using the slider or +/- buttons
3. Click "Start" to begin sending MIDI clock signals
4. Use toggle switches to enable/disable specific devices
5. Use "Reset" to resynchronize if any device loses sync

Keyboard Shortcuts

• Space: Start/Stop

License

This project is licensed under the MIT License - see the LICENSE file for details.