Cobra VAD — .NET Quick Start

Platforms

• Linux (x86_64)
• macOS (x86_64, arm64)
• Windows (x86_64, arm64)
• Raspberry Pi (Zero, 3, 4, 5)

Requirements

• Picovoice Account & AccessKey

.NET Framework 4.6.1+ / .NET Standard 2.0+ / .NET Core 3.0+:

• Windows (x86_64)

.NET Standard 2.0+ / .NET Core 3.0+:

• macOS (x86_64)

.NET 6.0+:

• macOS (arm64)
• Windows (arm64)
• Linux (x86_64)
• Raspberry Pi (3, 4, 5)

Picovoice Account & AccessKey

Signup or Login to Picovoice Console to get your AccessKey. Make sure to keep your AccessKey secret.

Quick Start

Setup

1. Install .NET.

2. Install the Cobra VAD NuGet package in Visual Studio or using the .NET CLI:

dotnet add package Cobra

Usage

Create an instance of the Cobra Voice Activity Detection engine:

using Pv;

const string accessKey = "${ACCESS_KEY}";

Cobra cobra = Cobra(accessKey);

Pass in frames of audio to the .Process function:

short[] GetNextAudioFrame()
{
    // .. get audioFrame
    return audioFrame;
}

while(true)
{    
    float voiceProbability = cobra.Process(GetNextAudioFrame())
    // .. use probability to trigger other functionality
}

Cobra will have its resources freed by the garbage collector, but to have resources freed immediately after use, wrap it in a using statement:

using(Cobra cobra = new Cobra(accessKey))
{
    // .. Cobra usage here
}

Demo

For the Cobra Voice Activity Detection .NET SDK, we offer demo applications that demonstrate how to use the VAD engine on real-time audio streams (i.e. microphone input) and audio files.

Setup

1. Clone the Cobra VAD repository from GitHub:

git clone https://github.com/Picovoice/cobra.git

2. Build the demo:

cd cobra/demo/dotnet/Cobra
dotnet build -c MicDemo.Release

Usage

Use the --help flag to see the usage options for the demo:

dotnet run -c MicDemo.Release -- --help

Ensure you have a working microphone connected to your system and run the following command to detect voice activity:

dotnet run -c MicDemo.Release -- --access_key ${ACCESS_KEY}

For more information on our Cobra Voice Activity Detection demos for .NET, head over to our GitHub repository.

Resources