WAV Player & Frequency Analyzer

A experimental C# project for learning digital audio processing from the ground up.

What it does

• Parses WAV files - Reads binary WAV format, handles chunks, extracts audio data
• Plays audio - Direct Windows API audio output using WinMM.dll
• Frequency analysis - DFT implementation to analyze audio spectrum
• Real-time processing - Chunk-by-chunk analysis with parallel processing

Current Features

✅ Full WAV file parser (handles any chunk order)
✅ Raw audio playback via Windows APIs
✅ DFT-based frequency analysis
✅ Real-time spectrum analysis
✅ Parallel processing (analyze next chunk while current plays)
✅ Telephone frequency detection

Usage

Put a .wav file in the project directory and update the filename in Program.cs:

string filename = "your-audio-file.wav";

Run the project to see:

• WAV file structure analysis
• Audio playback with live frequency analysis
• Peak frequency detection per chunk

Learning Goals

This is an experimental project to understand:

• Binary file formats and parsing
• Digital signal processing fundamentals
• Windows audio APIs and P/Invoke
• Real-time audio processing concepts
• Frequency domain analysis (DFT/FFT)

Future Ideas

• Implement FFT for better performance
• Add audio effects (reverb, echo, distortion)
• Real-time waveform visualization
• Maybe build a VST plugin someday! 🎵

Requirements

• Windows (uses WinMM.dll)
• .NET Core/Framework
• 16-bit PCM WAV files work best

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Just a fun experiment in audio programming!