Picovoice.Cheetah 2.0.1

dotnet add package Picovoice.Cheetah --version 2.0.1
NuGet\Install-Package Picovoice.Cheetah -Version 2.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Picovoice.Cheetah" Version="2.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Picovoice.Cheetah --version 2.0.1
#r "nuget: Picovoice.Cheetah, 2.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Picovoice.Cheetah as a Cake Addin
#addin nuget:?package=Picovoice.Cheetah&version=2.0.1

// Install Picovoice.Cheetah as a Cake Tool
#tool nuget:?package=Picovoice.Cheetah&version=2.0.1

Cheetah Binding for .NET

Cheetah Speech-to-Text Engine

Made in Vancouver, Canada by Picovoice

Cheetah is an on-device streaming speech-to-text engine. Cheetah is:

  • Private; All voice processing runs locally.
  • Accurate
  • Compact and Computationally-Efficient
  • Cross-Platform:
    • Linux (x86_64), macOS (x86_64, arm64), and Windows (x86_64)
    • Android and iOS
    • Chrome, Safari, Firefox, and Edge
    • Raspberry Pi (5, 4, 3) and NVIDIA Jetson Nano


  • .NET 6.0


Platform compatible with .NET Framework 4.6.1+:

  • Windows (x86_64)

Platforms compatible with .NET Core 2.0+:

  • Linux (x86_64)
  • macOS (x86_64)
  • Windows (x86_64)

Platforms compatible with .NET Core 3.0+:

  • Raspberry Pi:
    • 3 (32 and 64 bit)
    • 4 (32 and 64 bit)
    • 5 (32 and 64 bit)
  • NVIDIA Jetson Nano

Platform compatible with .NET 6.0+:

  • macOS (arm64)


You can install the latest version of Cheetah by getting the latest Cheetah Nuget package in Visual Studio or using the .NET CLI:

dotnet add package Picovoice.Cheetah


Cheetah requires a valid Picovoice AccessKey at initialization. AccessKey acts as your credentials when using Cheetah SDKs. You can get your AccessKey for free. Make sure to keep your AccessKey secret. Signup or Login to Picovoice Console to get your AccessKey.


Create an instance of the engine and transcribe an audio file:

using Pv;

const string accessKey = "${ACCESS_KEY}";

Cheetah handle = Cheetah.Create(accessKey);

Replace ${ACCESS_KEY} with yours obtained from Picovoice Console.

When initialized, the valid sample rate is given by handle.SampleRate. Expected frame length (number of audio samples in an input array) is handle.FrameLength. The engine accepts 16-bit linearly-encoded PCM and operates on single-channel audio.

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

string transcript = "";

    CheetahTranscript transcriptObj = handle.Process(GetNextAudioFrame());
    transcript += transcriptObj.Transcript;

    if (transcriptObj.IsEndpoint) {
        CheetahTranscript finalTranscriptObj = handle.Flush();
        transcript += finalTranscriptObj.Transcript;

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

using(Cheetah handle = Cheetah.Create(accessKey))
    // .. Cheetah usage here

The model file contains the parameters for the Cheetah engine. You may create bespoke language models using Picovoice Console and then pass in the relevant file.

using Pv;

const string accessKey = "${ACCESS_KEY}";
string modelPath = "/absolute/path/to/model.pv";

Cheetah handle = Cheetah.Create(accessKey, modelPath);


The Cheetah dotnet demo project is a .NET Core console app that allows for processing real-time audio (i.e. microphone) and files using Cheetah.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 is compatible.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETCoreApp 3.0

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.
  • net6.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.0.1 600 2/5/2024
2.0.0 829 11/24/2023
1.1.2 450 8/25/2023
1.0.4 752 6/13/2022
1.0.3 662 5/16/2022
1.0.2 603 3/11/2022
1.0.1 658 3/2/2022
1.0.0 547 3/1/2022