🎵 Audio Visualizer (WASAPI Loopback with NAudio + WPF)

A real-time audio visualizer using NAudio and .NET WPF that captures system output (Spotify, YouTube, etc.) via WASAPI Loopback and displays smooth bar-based frequency bands.

✨ Features

• Real-time audio visualization
• Captures output from any source (headphones, speakers, etc.)
• Bars scale with frequency:
  • Center bars show low frequencies
  • Left and right bars show increasing higher frequencies
• Clean WPF interface with dynamic visuals

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🔧 How to use this?

1. 📦 Install .NET SDK

Download and install the .NET SDK (any recent version):

• .NET 8 SDK (Recommended)

After installation, verify with:

dotnet --version

2. 📁 Clone this repo

git clone https://github.com/your-username/AudioVisualizer.git
cd AudioVisualizer

3. 📚 Install Dependencies

dotnet add package NAudio

You can also manually verify the following line exists in your .csproj:

<PackageReference Include="NAudio" Version="2.2.1" />

4. ▶️ Run the app

dotnet clean
dotnet build
dotnet run

Remarks

• It's a bit slow, buggy and skips frames but it works great nonetheless.

• You may encounter build-time errors in MainWindow.xaml.cs such as:

  The name 'InitializeComponent' does not exist in the current context

  The name 'VisualizerCanvas' does not exist in the current context

  Unknown x:Class type 'AudioVisualizer.App'

  ➡️ These are XAML designer errors and can often be safely ignored — the app usually builds and runs just fine.

  ✅ If the app window launches and shows bars reacting to system sound — it’s working!

🧠 Tech Stack

• .NET 8.0
• C#
• XAML
• WPF
• NAudio

👨‍💻 Author

Akshit Bansal (artistbansal2004@gmail.com)