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
AndroidCiOSPythonWeb
AndroidCiOSPythonWeb
SummaryPicovoice KoalaMozilla RNNoise
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

Koala Noise Suppression
Android Quick Start


Platforms

  • Android (5.0+)

Requirements

  • Picovoice Account and AccessKey
  • Android Studio
  • Android device with USB debugging enabled or Android simulator

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 Android Studio .

  2. Include mavenCentral() repository in the top-level build.gradle. Then add the following to the app's build.gradle:

dependencies {
// ...
implementation 'ai.picovoice:koala-android:${LATEST_VERSION}' // replace with latest version
}
  1. Add the following to the app's AndroidManifest.xml file to enable recording with an Android device's microphone:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

Usage

Create an instance of the engine with the Koala Builder by passing in your AccessKey and the Android app context:

import ai.picovoice.koala.*;
final String accessKey = "${ACCESS_KEY}"; // AccessKey provided by Picovoice Console (https://console.picovoice.ai/)
try {
Koala koala = new Koala.Builder()
.setAccessKey(accessKey)
.build(appContext);
} catch (KoalaException ex) { }

Enhance real-time audio:

short[] getNextAudioFrame() {
// .. get audioFrame
return audioFrame;
}
while true {
short[] enhancedAudioFrame = koala.process(getNextAudioFrame());
}

In case the next audio frame does not directly follow the previous one, reset Koala's internal state:

koala.reset();
while true {
short[] enhancedAudioFrame = koala.process(getNextAudioFrame());
}

When done, release resources explicitly:

koala.delete();

Demo

For the Koala Android SDK, we offer demo applications that demonstrate how to use the Noise Suppression engine on real-time audio streams (i.e. microphone input).

Setup

Clone the Koala repository from GitHub using HTTPS:

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

Usage

  1. Open the Android demo using Android Studio.
  2. Copy your AccessKey from Picovoice Console into the ACCESS_KEY variable in MainActivity.java .
  3. Run the application using a connected Android device or using an Android simulator.

Resources

Package

  • koala-android on Maven Central

API

  • koala-android API Docs

GitHub

  • Koala Android SDK on GitHub
  • Koala Android demo on GitHub

Was this doc helpful?

Issue with this doc?

Report a GitHub Issue
Koala Noise Suppression Android Quick Start
  • Platforms
  • Requirements
  • Picovoice Account & AccessKey
  • Quick Start
  • Setup
  • 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.