Javascript - How to get more voices for text to speech? - javascript

I made this little script where you can enter some message and it reads it out.
I solved it by using FireFox SpeechSynthesis API.
How can I get more voices and support for more languages?
Note: There is a "bug" in SO. If I edit my question and edit the script and test it from there, then 4 voices are
loading. If I run the code snippet normally, then no voices are
loading, but the default voice.
if ('speechSynthesis' in window) {
// Speech Synthesis supported
} else {
// Speech Synthesis Not Supported
alert("Sorry, your browser doesn't support text to speech!");
}
const voices = speechSynthesis.getVoices();
populateVoiceList();
if (typeof speechSynthesis !== 'undefined' && speechSynthesis.onvoiceschanged !== undefined) {
speechSynthesis.onvoiceschanged = populateVoiceList;
}
var selectedLang = $("#voiceSelect").find("option").attr("data-lang");
var selectedVoice = $("#voiceSelect").find("option").attr("data-pos");
$("#voiceSelect").change(function() {
selectedLang = $(this).find("option:selected").attr("data-lang");
selectedVoice = $(this).find("option:selected").attr("data-pos");
});
$("#start").click(function() {
var msg = new SpeechSynthesisUtterance();
msg.text = $("#message").val();
msg.lang = selectedLang;
msg.voice = voices[selectedVoice];
console.log(msg);
window.speechSynthesis.speak(msg);
});
// Hide Dropdown if there is only one voice
if ($("#voiceSelect option").length == 0) {
$("#voiceSelect").hide();
}
function populateVoiceList()
{
if (typeof speechSynthesis === 'undefined') {
return;
}
for (let i = 0; i < voices.length; i++) {
const option = document.createElement('option');
option.textContent = `${voices[i].name} (${voices[i].lang})`;
if (voices[i].default) {
option.textContent += ' — DEFAULT';
}
option.setAttribute('data-lang', voices[i].lang);
option.setAttribute('data-name', voices[i].name);
option.setAttribute('data-voice-uri', voices[i].voiceURI);
option.setAttribute('data-pos', i);
document.getElementById("voiceSelect").appendChild(option);
}
}
.flex-container {
display: flex;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="voiceSelect"></select>
<div class="flex-container">
<textarea id="message" value="test"></textarea>
<button id="start">Start</button>
</div>
JSFiddle

How can I get more voices and support for more languages?
Currently there isn't a browser vendor that supports loading custom/more voices. It doesn't appear to be part of the nascent specification yet either, as there is an open issue asking how to add more voices.
The list of voices is dependent upon the user agent/device because that is how it is specified. User agents are using either a native speech engine provided by the device OS or a network based speech engine, each of which work with a set of supported voices. Here is a comment from a chromium issue about not being able to support boundary events because of the missing capabilities in the native/network based speech engines, as an example of the platform the Web Speech API is dependent upon.
If you want to see what voices are available for various devices/browsers you can go to https://morganney.github.io/tts-react/?path=/story/tts-react--hook and click the "load" button to get an HTML <select> of the SpeechSynthesisVoice's supported.
You can also run the snippet below to see what voices are available:
let voices = []
const btn = document.getElementById('load')
const options = document.getElementById('voices')
const hasSynth = 'speechSynthesis' in window
if (hasSynth) {
voices = speechSynthesis.getVoices()
speechSynthesis.addEventListener('voiceschanged', () => {
voices = speechSynthesis.getVoices()
})
}
btn.addEventListener('click', () => {
const initOpt = document.createElement('option')
if (!voices.length && hasSynth) {
voices = speechSynthesis.getVoices()
}
initOpt.append(document.createTextNode('-- select voice --'))
options.append(initOpt)
voices.forEach(voice => {
const option = document.createElement('option')
option.value = voice.name
option.append(document.createTextNode(`${voice.lang} - ${voice.name}`))
options.append(option)
})
options.style.display = 'inline'
})
options.addEventListener('change', (evt) => {
if (hasSynth) {
const utterance = new SpeechSynthesisUtterance()
utterance.text = 'Testing the selected voice.'
utterance.voice = voices.find(voice => voice.name === evt.target.value)
speechSynthesis.speak(utterance)
}
})
#voices {
display: none;
}
<button id="load">click to load voices</button>
<select id="voices">
</select>

I have slightly altered your code and have a working version here: https://jsfiddle.net/lharby/j36nbhy1/
First we set synth variable and also a let to initialise voices as an empty array which we can push to later
const synth = window.speechSynthesis;
let voices = [];
Then we have to pass voices = synth.getVoices(); inside our populateVoiceList function as the call to it works asynchronously.
Then I changed the for loop, for a forEach function like so:
voices.forEach((item, index) => {
const option = document.createElement('option');
option.textContent = `${item.name} (${item.lang})`;
option.setAttribute('data-lang', item.lang);
option.setAttribute('data-name', item.name);
option.setAttribute('data-voice-uri', item.voiceURI);
option.setAttribute('data-pos', index);
document.getElementById("voiceSelect").appendChild(option);
});
I think the rest is pretty much the same, but let me know if you get issues. I did have to make a couple of edits in order to test.

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I have implemented text to speech in javascript it is a funtion which create speech back to back process for different message. sometime before it was working fine but after updating chrome (auto update of window) it doesn't work so i have used artyom library which was also working fine. but now after update of windows again it does support speech again..
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if ( 'speechSynthesis' in window )
{
window.speechSynthesis.cancel();
//$(".divRandom").hide();
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Here is my code based on color example (<com.sun.speech.app.numbers.*> is taken from w3c docs about grammars)
<!DOCTYPE html>
<html>
<body>
<script>
var SpeechRecognition = SpeechRecognition || webkitSpeechRecognition;
var SpeechGrammarList = SpeechGrammarList || webkitSpeechGrammarList;
var SpeechRecognitionEvent = SpeechRecognitionEvent || webkitSpeechRecognitionEvent;
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recognition.onerror = function(event) {
console.log(event.error);
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document.body.onclick = function() {
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recognition.onresult = function(event) {
var numbers = ['zero', 'one', 'two'];
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node.style.color = 'red';
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<div id="one">one</div>
<div id="two">two</div>
</body>
</html>
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How to automatically Start google speech recognition on my page?

I wrote a HTML5 webpage consisting only of:
<input type="text" style="font-size: 40px;" name="speech" size="50" x-webkit-speech/>
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Thanks to anyone who answers ! ;)
You can try to use Web Speech API, for example:
if ('webkitSpeechRecognition' in window) {
var recognition = new webkitSpeechRecognition();
var final_transcript = '';
recognition.continuous = true;
recognition.interimResults = true;
recognition.onresult = function( event ) {
var final_transcript = '';
for (var i = event.resultIndex; i < event.results.length; ++i) {
if (event.results[i].isFinal) {
final_transcript += event.results[i][0].transcript;
}
}
document.getElementById( 'speech' ).value = final_transcript;
};
recognition.start();
}
The only one thing is that you will need to allow page to use microphone at page load
jsFiddle demo

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