Picovoice WordmarkPicovoice Console
Introduction
Introduction
AndroidC.NETFlutterlink to GoiOSJavaNvidia JetsonLinuxmacOSNodejsPythonRaspberry PiReact NativeRustWebWindows
AndroidC.NETFlutterlink to GoiOSJavaNodejsPythonReact NativeRustWeb
SummaryPicovoice LeopardAmazon TranscribeAzure Speech-to-TextGoogle ASRGoogle ASR (Enhanced)IBM Watson Speech-to-Text
FAQ
Introduction
AndroidC.NETFlutterlink to GoiOSJavaNodejsPythonReact NativeRustWeb
AndroidC.NETFlutterlink to GoiOSJavaNodejsPythonReact NativeRustWeb
FAQ
Introduction
AndroidCiOSLinuxmacOSPythonWebWindows
AndroidCiOSPythonWeb
SummaryOctopus Speech-to-IndexGoogle Speech-to-TextMozilla DeepSpeech
FAQ
Introduction
AndroidAngularArduinoBeagleBoneCChrome.NETEdgeFirefoxFlutterlink to GoiOSJavaNvidia JetsonLinuxmacOSMicrocontrollerNodejsPythonRaspberry PiReactReact NativeRustSafariUnityVueWebWindows
AndroidAngularC.NETFlutterlink to GoiOSJavaMicrocontrollerNodejsPythonReactReact NativeRustUnityVueWeb
SummaryPorcupineSnowboyPocketSphinx
Wake Word TipsFAQ
Introduction
AndroidAngularBeagleBoneCChrome.NETEdgeFirefoxFlutterlink to GoiOSJavaNvidia JetsonlinuxmacOSNodejsPythonRaspberry PiReactReact NativeRustSafariUnityVueWebWindows
AndroidAngularC.NETFlutterlink to GoiOSJavaNodejsPythonReactReact NativeRustUnityVueWeb
SummaryPicovoice RhinoGoogle DialogflowAmazon LexIBM WatsonMicrosoft LUIS
Expression SyntaxFAQ
Introduction
AndroidBeagleboneCiOSNvidia JetsonLinuxmacOSPythonRaspberry PiRustWebWindows
AndroidCiOSPythonRustWeb
SummaryPicovoice CobraWebRTC VAD
FAQ
Introduction
AndroidAngularArduinoBeagleBoneC.NETFlutterlink to GoiOSJavaNvidia JetsonMicrocontrollerNodejsPythonRaspberry PiReactReact NativeRustUnityVueWeb
AndroidAngularCMicrocontroller.NETFlutterlink to GoiOSJavaNodejsPythonReactReact NativeRustUnityVueWeb
Picovoice SDK - FAQ
IntroductionSTM32F407G-DISC1 (Arm Cortex-M4)STM32F411E-DISCO (Arm Cortex-M4)STM32F769I-DISCO (Arm Cortex-M7)IMXRT1050-EVKB (Arm Cortex-M7)
FAQGlossary

Leopard Speech-to-Text
Flutter Quick Start


Platforms

  • Flutter (2.8.1+)
  • Android (5.0+, API 21+)
  • iOS (9.0+)

Requirements

  • Flutter SDK
  • Android SDK (21+)
  • JDK (8+)
  • Xcode (9+)

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 Flutter SDK.

  2. Run flutter doctor to determine any missing requirements.

  3. Add the Leopard plugin to your app project by referencing it in pubspec.yaml:

dependencies:
leopard_flutter: ^<version>
  1. Enable the proper permissions for recording with the hardware's microphone on both iOS and Android:

iOS

Open your Info.plist and add the following line:

<key>NSMicrophoneUsageDescription</key>
<string>[Permission explanation]</string>

Android

Open your AndroidManifest.xml and add the following line:

<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.INTERNET"/>

Leopard Model File Integration

Add the Leopard model file to your Flutter application:

  1. Create a model in Picovoice Console or use the default model.
  2. Add the model file to an assets folder in your project directory.
  3. Add the asset to your pubspec.yaml:
flutter:
assets:
- assets/leopard_model.pv
  1. In this example, the path to the model file in code would then be as follows:
String modelPath = "assets/leopard_model.pv";

Usage

An instance of Leopard is created by passing a model file path into its static constructor create:

import 'package:leopard_flutter/leopard.dart';
String accessKey = '{ACCESS_KEY}' // AccessKey obtained from Picovoice Console (https://console.picovoice.ai/)
String modelPath = '{LEOPARD_MODEL_PATH}' // path relative to the assets folder or absolute path to file on device
void createLeopard() async {
try {
_leopard = await Leopard.create(accessKey, modelPath);
} on LeopardException catch (err) {
// handle Leopard init error
}
}

Transcribe an audio file by passing in the path:

try {
LeopardTranscript result = await _leopard.processFile("${AUDIO_FILE_PATH}");
print(result.transcript);
} on LeopardException catch (err) { }

When done, resources have to be released explicitly:

leopard.delete();

Demo

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

Setup

Clone the Leopard repository from GitHub using HTTPS:

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

Usage

  1. Replace {YOUR_ACCESS_KEY_HERE} with a valid AccessKey in the demo/flutter/lib/main.dart file:

  2. Copy assets:

cd leopard/demo/flutter
bash copy_assets.sh

NOTE: on Windows, Git Bash or another bash shell is required, or you will have to manually copy the leopard demo model file

  1. Build and deploy the demo to your device:
flutter run

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

Resources

Package

  • leopard_flutter on pub.dev

API

  • leopard_flutter API Docs

GitHub

  • Leopard Flutter SDK on GitHub
  • Leopard Flutter demo on GitHub

Benchmark

  • Speech-to-Text Benchmark

Was this doc helpful?

Issue with this doc?

Report a GitHub Issue
Leopard Speech-to-Text Flutter Quick Start
  • Platforms
  • Requirements
  • Picovoice Account & AccessKey
  • Quick Start
  • Setup
  • Leopard Model File Integration
  • Usage
  • Demo
  • Setup
  • Usage
  • Resources
Platform
  • Leopard Speech-to-Text
  • Cheetah Streaming Speech-to-Text
  • Octopus Speech-to-Index
  • Porcupine Wake Word
  • Rhino Speech-to-Intent
  • Cobra Voice Activity Detection
Resources
  • Docs
  • Console
  • Blog
  • Demos
Sales
  • Pricing
  • Starter Tier
  • Enterprise
Company
  • Careers
Follow Picovoice
  • LinkedIn
  • GitHub
  • Twitter
  • Medium
  • YouTube
  • AngelList
Subscribe to our newsletter
Terms of Use
Privacy Policy
© 2019-2022 Picovoice Inc.