Voice Diagnostics SDK

The Voice Diagnostics SDK provides functions to test input and output audio devices, and the functionality to test network bandwidth requirements towards Twilio’s servers.

This SDK requires the use of Twilio NTS to perform the network tests. Using NTS will incur charges as per NTS pricing.

Features

• Input audio device tests include volume calculation
• Output audio device tests are done by playing a sound file to the selected device
• Bandwidth requirements tests

Prerequisites

• A Twilio account. Sign up for free here
• Node.js v10+
• NPM v6+ (comes installed with newer Node versions)

Installation

Building the project locally

# Clone repository
git clone git@github.com:twilio/rtc-diagnostics.git
cd rtc-diagnostics

# Install dependencies
npm install

# Build the artifacts under dist folder
npm run build

NPM

You can install directly from npm.

npm install @twilio/rtc-diagnostics --save

Or install from a local directory.

npm install /local-path-to-repo/rtc-diagnostics

Using this method, you can import rtc-diagnostics like so:

import { testBitrate } from '@twilio/rtc-diagnostics';

Script tag

You can also include rtc-diagnostics.js directly in your web app using a <script> tag.

<script src="https://my-server-path/rtc-diagnostics.js"></script>

Using this method, rtc-diagnostics.js will set a browser global:

const { testBitrate } = Twilio.Diagnostics;

Usage

The following are examples for running tests. For more information, please refer to the API Docs

BitrateTest Example

import { testBitrate } from '@twilio/rtc-diagnostics';

const bitrateTest = testBitrate({
 iceServers: [{
   credential: 'bar',
   username: 'foo',
   urls: 'turn:global.turn.twilio.com:3478?transport=udp',
 }],
});

bitrateTest.on('bitrate', (bitrate) => {
 console.log(bitrate);
});

bitrateTest.on('error', (error) => {
 console.log(error);
});

bitrateTest.on('end', (report) => {
 console.log(report);
});

setTimeout(() => {
 bitrateTest.stop();
}, 10000);

See BitrateTest.Options for more information for how to obtain the urls values

InputTest Example

import { testInputDevice, InputTest } from '@twilio/rtc-diagnostics';

const outputDeviceTest = testInputDevice({
  deviceId: ...,
});

inputDeviceTest.on(InputTest.Events.Volume, (volume) => {
  console.log(volume);
});

inputDeviceTest.on(InputTest.Events.Error, (error) => {
  console.error(error);
});

inputDeviceTest.on(InputTest.Events.End, (report) => {
  console.log(report);
});

setTimeout(() => {
  inputDeviceTest.stop();
}, 10000);

OutputTest Example

import { testOutputDevice, OutputTest } from '@twilio/rtc-diagnostics';

const outputDeviceTest = testOutputDevice({
  deviceId: ...,
});

outputDeviceTest.on(InputTest.Events.Volume, (volume) => {
  console.log(volume);
});

outputDeviceTest.on(InputTest.Events.Error, (error) => {
  console.error(error);
});

outputDeviceTest.on(InputTest.Events.End, (report) => {
  console.log(report);
});

setTimeout(() => {
  outputDeviceTest.stop();
}, 10000);

Related

• Twilio Voice Client JS SDK
• Twilio Voice Client JS Quickstart
• Twilio Client connectivity requirements

License

See LICENSE.md