Audio Processing with MAUI

🛠️ Prerequisites

1. Visual Studio 2022 (with .NET MAUI workload).

2. NuGet Packages:

   Plugin.Maui.Audio # For audio access
   NWaves # Audio processing (v0.9.6+)
   SkiaSharp.Views.Maui # Waveform visualization

3. Mobile Device/Emulator (Real-time audio requires hardware).

📂 Project Setup

1. Create a new .NET MAUI project:

   dotnet new maui -n MauiVoiceChanger

2. Add NuGet packages:

🎤 Step 1: Capture Microphone Input

Code: AudioService.cs

🎚️ Step 2: Create AudioProcessor

Code: `AudioProcessor.cs**

NWaves Helper Class: AudioConverters.cs

📢 Step 3: Play Processed Audio

Code: AudioPlayerService.cs

📱 Step 4: MAUI UI with Real-Time Controls

XAML: MainPage.xaml

Code-Behind: MainPage.xaml.cs

⚡ Step 5: Waveform Visualization (SkiaSharp)

🚀 Advanced Optimizations

1. Zero-Copy Buffers:
   Replace byte[] with Memory<byte> in AudioService to reduce GC pressure.

2. Real-Time Processing:
   Use CircularBuffer from NWaves for streaming effects without lag.

3. Platform-Specific Tuning:

   • Android: Enable low-latency mode in AndroidManifest.xml:
   <uses-permission android:name="android.permission.RECORD_AUDIO" /> <application android:hardwareAccelerated="true" />

   • iOS: Request mic permissions in Info.plist:

     <key>NSMicrophoneUsageDescription</key>
     <string>Voice effects require microphone access</string>

📦 Repository Structure

MauiVoiceChanger/
├── Services/
│ ├── AudioService.cs # Mic capture
│ ├── AudioProcessor.cs # Pitch/echo/reverb/chorus
│ └── AudioPlayerService.cs # Playback
├── Views/
│ ├── MainPage.xaml # UI
│ └── MainPage.xaml.cs # Logic
├── Utils/
│ ├── WaveformRenderer.cs # SkiaSharp visuals
│ └── AudioConverters.cs # byte[] <-> float[]
└── Platforms/ # Native configs

🎉 Final Notes

• Test on Physical Devices: Emulators often lack mic support.

• Extend Further:

  • Add AI voice cloning via Whisper.NET .

  • Implement a "Save to File" feature with NWaves.WaveFileWriter.

• Repo Azure Dev Ops - AudioProcessing