Unity Socket Voice Chat Example 🎙️

This Unity project demonstrates a real-time voice chat system using:

• 🎧 Microphone input with Opus codec (via Concentus)
• 🔊 Dynamic bandpass audio filtering
• 📡 WebSocket communication (via WebSocketSharp)
• 🎮 Unity AudioSource streaming with a circular buffer

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Features

• ✅ Record microphone audio in real time.
• ✅ Apply a bandpass filter with adjustable lowFreq and highFreq.
• ✅ Encode audio using Opus codec for low-latency transmission.
• ✅ Transmit voice data over a WebSocket connection.
• ✅ Decode and playback received voice with a continuous audio stream.

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Setup

🔧 Requirements

• Unity 2020.3 or newer (tested on Unity 2021+)
• NuGetForUnity plugin for package management
• A WebSocket server (see below)

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📦 Dependencies (via NuGet)

1. Install NuGetForUnity

1. Download the latest .unitypackage from NuGetForUnity Releases
2. Import it into your Unity project (Assets → Import Package → Custom Package)
3. A new NuGet menu will appear in the Unity toolbar.

2. Install Required Packages

Use the NuGet → Manage NuGet Packages menu and search for:

• Concentus (e.g., Concentus.Oggfile or Concentus by lostromb)

Once installed, Unity will generate .csproj references for you.

✅ No need to manually copy DLLs!

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Project Structure

🎙️ OpusMicRecorder.cs

Captures microphone audio, filters it, and encodes using Opus.

📤 OpusVoiceSender.cs

Sends encoded voice packets to a WebSocket server.

📥 OpusVoiceReceiverWithBuffer.cs

Receives Opus packets, decodes them, and streams via AudioSource.

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🔌 WebSocket Server

You can use a simple WebSocket server for voice routing. Here’s a Python example:

pip install websockets