Leopard Speech-to-Text
.NET Quick Start

Platforms

• Linux (x86_64)
• macOS (x86_64, arm64)
• Windows (x86_64)
• NVIDIA Jetson Nano
• Raspberry Pi (3, 4)

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+:

• Linux (x86_64)
• macOS (x86_64)

.NET Core 3.0+:

• NVIDIA Jetson Nano
• Raspberry Pi (3, 4)

.NET 6.0+:

• macOS (arm64)

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 Leopard NuGet package in Visual Studio or using the .NET CLI:

dotnet add package Leopard

Usage

Create an instance of the engine:

using Pv;

const string accessKey = "${ACCESS_KEY}";

Leopard leopard = Leopard.Create(accessKey);

Transcribe an audio file by providing an absolute path to the file:

LeopardTranscript result = leopard.ProcessFile("${AUDIO_FILE_PATH}");

Transcribe raw audio data (sample rate of 16 kHz, 16-bit linearly encoded and 1 channel):

short[] GetAudioData()
{
   // ...
}

LeopardTranscript result = leopard.Process(GetAudioData());

Language Model

The Leopard .NET SDK comes preloaded with a default English language model (.pv file). Default models for other supported languages can be found in the Leopard GitHub repository .

Create custom language models using the Picovoice Console . Here you can train language models with custom vocabulary and boost words in the existing vocabulary.

To switch from the default English model, pass in a .pv file to the .Create() constructor:

Leopard leopard = Leopard.Create(accessKey, modelPath: "${MODEL_PATH}");

Demo

For the Leopard .NET SDK, we offer demo applications that demonstrate how to use the Speech-to-Text engine on audio files.

Setup

1. Clone the Leopard repository from GitHub:

git clone --recurse-submodules https://github.com/Picovoice/leopard.git

2. Build the demo:

cd leopard/demo/dotnet/Leopard
dotnet build -c FileDemo.Release

Usage

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

dotnet run -c FileDemo.Release -- --help

Run the following command to transcribe an audio file:

dotnet run -c FileDemo.Release -- --access_key ${ACCESS_KEY}
                                  --input_audio_path ${AUDIO_PATH}

For more information on our Leopard demos for .NET, head over to our GitHub repository .

Resources