AUDX

A beautiful, real-time audio visualizer for macOS.

Features

• Real-time FFT analysis with logarithmic frequency scaling
• 64 frequency bars covering 20Hz - 20kHz
• Smooth animations with asymmetric attack/decay
• Frequency compensation for balanced visualization
• Apple-inspired UI with glassmorphism
• Transparent window - floats beautifully on your desktop
• Draggable - position it anywhere

Tech Stack

• Tauri 2 - Native desktop app framework
• Rust - Audio processing with cpal + rustfft
• React + TypeScript - UI rendering
• Vite - Fast builds

Installation

# Clone the repo
git clone https://github.com/APRK01/AUDX.git
cd AUDX

# Install dependencies
npm install

# Run in development
npm run tauri dev

# Build for production
npm run tauri build

Requirements

• macOS 11+
• Node.js 18+
• Rust 1.70+
• Microphone permission (for audio input)

How It Works

1. Audio Capture - Uses cpal to capture system audio input
2. FFT Processing - Applies Hann window + FFT via rustfft
3. Log Binning - Maps FFT bins to 64 logarithmic frequency bands
4. dB Scaling - Converts to decibels for natural perception
5. Smoothing - Asymmetric smoothing (fast rise, slow fall)
6. Rendering - Canvas-based bars with gradient fills

Configuration

Edit src-tauri/src/lib.rs to customize:

const NUM_BARS: usize = 64;        // Number of bars
const MIN_FREQ: f32 = 20.0;        // Lowest frequency
const MAX_FREQ: f32 = 20000.0;     // Highest frequency
const SENSITIVITY: f32 = 1.5;      // Overall gain

Author

APRK (Advaith Praveen)

License

MIT