1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
---
title: SpeechSynthesisUtterance
slug: Web/API/SpeechSynthesisUtterance
tags:
- API
- Experimental
- Interface
- NeedsTranslation
- Reference
- SpeechSynthesisUtterance
- TopicStub
- Web Speech API
- speech
- synthesis
translation_of: Web/API/SpeechSynthesisUtterance
---
<p>{{APIRef("Web Speech API")}}{{SeeCompatTable}}</p>
<p>The <strong><code>SpeechSynthesisUtterance</code></strong> interface of the <a href="/en-US/docs/Web/API/Web_Speech_API">Web Speech API</a> represents a speech request. It contains the content the speech service should read and information about how to read it (e.g. language, pitch and volume.)</p>
<h2 id="Constructor">Constructor</h2>
<dl>
<dt>{{domxref("SpeechSynthesisUtterance.SpeechSynthesisUtterance()")}}</dt>
<dd>Returns a new <code>SpeechSynthesisUtterance</code> object instance.</dd>
</dl>
<h2 id="Properties">Properties</h2>
<p><em><code>SpeechSynthesisUtterance</code> also inherits properties from its parent interface, {{domxref("EventTarget")}}.</em></p>
<dl>
<dt>{{domxref("SpeechSynthesisUtterance.lang")}}</dt>
<dd>Gets and sets the language of the utterance.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.pitch")}}</dt>
<dd>Gets and sets the pitch at which the utterance will be spoken at.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.rate")}}</dt>
<dd>Gets and sets the speed at which the utterance will be spoken at.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.text")}}</dt>
<dd>Gets and sets the text that will be synthesised when the utterance is spoken.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.voice")}}</dt>
<dd>Gets and sets the voice that will be used to speak the utterance.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.volume")}}</dt>
<dd>Gets and sets the volume that the utterance will be spoken at.</dd>
</dl>
<h3 id="Event_handlers">Event handlers</h3>
<dl>
<dt>{{domxref("SpeechSynthesisUtterance.onboundary")}}</dt>
<dd>Fired when the spoken utterance reaches a word or sentence boundary.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.onend")}}</dt>
<dd>Fired when the utterance has finished being spoken.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.onerror")}}</dt>
<dd>Fired when an error occurs that prevents the utterance from being succesfully spoken.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.onmark")}}</dt>
<dd>Fired when the spoken utterance reaches a named SSML "mark" tag.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.onpause")}}</dt>
<dd>Fired when the utterance is paused part way through.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.onresume")}}</dt>
<dd>Fired when a paused utterance is resumed.</dd>
<dt>{{domxref("SpeechSynthesisUtterance.onstart")}}</dt>
<dd>Fired when the utterance has begun to be spoken.</dd>
</dl>
<h2 id="Examples">Examples</h2>
<p>In our basic <a href="https://github.com/mdn/web-speech-api/tree/master/speak-easy-synthesis">Speech synthesiser demo</a>, we first grab a reference to the SpeechSynthesis controller using <code>window.speechSynthesis</code>. After defining some necessary variables, we retrieve a list of the voices available using {{domxref("SpeechSynthesis.getVoices()")}} and populate a select menu with them so the user can choose what voice they want.</p>
<p>Inside the <code>inputForm.onsubmit</code> handler, we stop the form submitting with <a href="/en-US/docs/Web/API/Event/preventDefault">preventDefault()</a>, use the {{domxref("SpeechSynthesisUtterance.SpeechSynthesisUtterance()", "constructor")}} to create a new utterance instance containing the text from the text {{htmlelement("input")}}, set the utterance's {{domxref("SpeechSynthesisUtterance.voice","voice")}} to the voice selected in the {{htmlelement("select")}} element, and start the utterance speaking via the {{domxref("SpeechSynthesis.speak()")}} method.</p>
<pre class="brush: js">var synth = window.speechSynthesis;
var inputForm = document.querySelector('form');
var inputTxt = document.querySelector('input');
var voiceSelect = document.querySelector('select');
var voices = synth.getVoices();
for(i = 0; i < voices.length ; i++) {
var option = document.createElement('option');
option.textContent = voices[i].name + ' (' + voices[i].lang + ')';
option.setAttribute('data-lang', voices[i].lang);
option.setAttribute('data-name', voices[i].name);
voiceSelect.appendChild(option);
}
inputForm.onsubmit = function(event) {
event.preventDefault();
var utterThis = new SpeechSynthesisUtterance(inputTxt.value);
var selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
for(i = 0; i < voices.length ; i++) {
if(voices[i].name === selectedOption) {
utterThis.voice = voices[i];
}
}
synth.speak(utterThis);
inputTxt.blur();
}</pre>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('Web Speech API', '#utterance-attributes', 'SpeechSynthesisUtterance')}}</td>
<td>{{Spec2('Web Speech API')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>{{CompatibilityTable}}</div>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome(33)}}</td>
<td>{{CompatGeckoDesktop(49)}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatUnknown}}</td>
<td>7</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Chrome</th>
<th>Firefox Mobile (Gecko)</th>
<th>Firefox OS</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatNo}}</td>
<td>2.0</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>7.1</td>
</tr>
</tbody>
</table>
</div>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/docs/Web/API/Web_Speech_API">Web Speech API</a></li>
</ul>
|
