Blind Card

Blind audio comparison tool with a poker card themed UI. Supports AU/VST3 plugins and standalone application.

Features

• Blind Testing Mode: Random shuffle eliminates bias for objective audio comparison
• Multiple Rating Methods:
  • Star rating (1-5 stars)
  • Guess mode (guess the original track)
  • Q&A quiz mode
• Loudness Matching: Automatic LUFS measurement and gain compensation
• Poker Card UI: Casino-style interface, supports up to 8 cards
• Standalone Mode: Built-in audio player, can load audio files for direct comparison

System Requirements

• macOS 10.15+
• CMake 3.22+
• C++17 compiler

Build

git clone https://github.com/SugoiAudioTech/BlindCard.git
cd BlindCard
mkdir build && cd build
cmake ..
cmake --build .

JUCE is automatically downloaded during the CMake configure step.

After building, plugins are automatically copied to system plugin directories.

Formats

• AU (Audio Unit)
• VST3
• Standalone

Usage

Blind Card lets you compare audio tracks without knowing which is which — eliminating bias from your decisions.

As a Plugin (AU/VST3)

1. Insert Blind Card on each track you want to compare (2-8 tracks)

2. Choose a rating mode:

   • ⭐ Stars – Rate each track from 1-5 stars
   • 🎯 Guess – Identify which plugin/mix is on each card
   • ❓ Q&A – Find a specific track when prompted

3. Click "SHUFFLE" to randomize and hide track identities

4. Click cards to listen and rate (or use ← → arrow keys)

5. Click "REVEAL" to see results and actual track names

6. Click "RESET" to start a new test

As a Standalone App

1. Launch the standalone application
2. Drag & drop or import audio files to compare
3. Follow the same workflow as above

Tips

💡 Level Matching: Enable "Auto Gain" to level-match all tracks, ensuring fair comparison without volume bias.

💡 Keyboard Shortcuts: Use arrow keys (← →) to quickly switch between cards during testing.

Project Structure

Source/
├── Core/                 # Core logic
│   ├── BlindCardManager  # Game state management
│   └── Types.h           # Data structure definitions
├── Standalone/           # Standalone mode audio engine
├── UI/
│   ├── Components/       # UI components
│   ├── Theme/            # Theme and fonts
│   └── Animation/        # Animation system
└── Plugin*.cpp/h         # JUCE plugin entry

License

Copyright (c) 2026 Sugoi Audio Tech

AGPL-3.0 - See LICENSE for details.

This project is based on JUCE, which is licensed under AGPL-3.0. As a derivative work, this project must also be licensed under AGPL-3.0.