Live Decibel Meter for OBS Studio

A beautiful, customizable live decibel meter designed for OBS Studio overlays with a liquid glass design aesthetic.

Features

• Real-time Decibel Monitoring: Polls a web server for live decibel data
• Liquid Glass Design: Beautiful circular gauge with glassmorphism effects
• Customizable Settings:
  • Change polling URL and interval
  • Customize colors (gauge, background, text)
  • Adjust container size
  • Toggle settings button visibility
• Max Value Tracking: Displays the highest decibel reading
• Elapsed Time: Shows how long the meter has been running
• OBS-Ready: Optimized for use as a browser source in OBS Studio

Quick Start

1. Install Dependencies:

   npm install

2. Start the Server:

   npm start

3. Open in Browser: Navigate to http://localhost:3000

4. Configure for Your Setup:

   • Open the settings panel (⚙️ button)
   • Change the polling URL to your decibel meter server
   • Adjust colors and size as needed

Usage with OBS Studio

1. In OBS Studio, add a new "Browser Source"
2. Set the URL to http://localhost:3000 (or your server's IP)
3. Set the width and height (recommended: 400x500)
4. Enable "Shutdown source when not visible" for better performance

API Integration

The meter expects JSON data from your polling URL. It supports multiple formats:

// Format 1: Direct decibel value
{"decibel": 65.5}

// Format 2: Generic value
{"value": 65.5}

// Format 3: Level property
{"level": 65.5}

// Format 4: Any numeric property
{"dB": 65.5}

Settings

• Polling URL: The endpoint to fetch decibel data from
• Polling Interval: How often to fetch data (50-5000ms)
• Gauge Color: Color of the liquid fill effect
• Background Color: Main background color
• Text Color: Color of all text elements
• Container Size: Scale factor for the entire display (50%-200%)
• Show Settings: Toggle the settings button visibility

File Structure

├── index.html          # Main HTML structure
├── styles.css          # CSS with liquid glass design
├── script.js           # JavaScript functionality
├── server.js           # Local development server
├── package.json        # Node.js dependencies
└── README.md          # This file

Customization

The meter automatically saves your settings to localStorage, so your preferences persist between sessions. You can modify the CSS in styles.css to further customize the appearance.

Performance Notes

• The meter pauses polling when the browser tab is not visible
• Optimized for smooth 60fps animations
• Uses CSS transforms and backdrop-filter for hardware acceleration
• Minimal CPU usage when not actively displaying

Browser Compatibility

• Chrome/Edge: Full support
• Firefox: Full support
• Safari: Full support (may need to enable backdrop-filter)
• Mobile browsers: Responsive design included

Troubleshooting

No data showing: Check that your polling URL is correct and accessible Settings not saving: Ensure localStorage is enabled in your browser Performance issues: Reduce polling interval or disable animations in settings