Cobra VAD — Web Quick Start

Platforms

• Chrome & Chromium-based browsers
• Edge
• Firefox
• Safari

Requirements

• Picovoice Account and AccessKey
• Node.js 16+
• npm

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 Node.js.

2. Install the Web Voice Processor and Cobra Voice Activity Detection Web packages:

npm install @picovoice/web-voice-processor @picovoice/cobra-web

Usage

Create an instance of CobraWorker:

import { CobraWorker } from "@picovoice/cobra-web";

function voiceProbabilityCallback(voiceProbability: number) {
    // take action based on voice probability
}

const cobra = await CobraWorker.create(
    "${ACCESS_KEY}",
    voiceProbabilityCallback
);

Subscribe CobraWorker to WebVoiceProcessor to start processing audio frames:

import { WebVoiceProcessor } from "@picovoice/web-voice-processor"

await WebVoiceProcessor.subscribe(cobra)

Release resources explicitly when done with Cobra Voice Activity Detection:

await WebVoiceProcessor.unsubscribe(cobra)
await cobra.release()

Demo

For the Cobra Voice Activity Detection Web SDK, there is a Web demo project available on the Cobra Voice Activity Detection GitHub repository.

Setup

Clone the Cobra Voice Activity Detection repository from GitHub:

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

Usage

1. Install dependencies and run:

cd cobra/demo/web
npm install
npm run start

2. Open http://localhost:5000 to view it in the browser.

Resources