语法：
| 属性 | 取值 | 默认值 |
|---|---|---|
| voice-volume | <number> | <percentage> | silent | x-soft | soft | medium | loud | x-loud | inherit | medium |
| voice-balance | <number> | left | center | right | leftwards | rightwards | inherit | center |
| speak | none | normal | spell-out | digits | literal-punctuation | no-punctuation | inherit | normal |
| pause-before, pause-after | <time> | none | x-weak | weak | medium | strong | x-strong | inherit | implementation dependent |
| pause | [ <'pause-before'> || <'pause-after'> ] | inherit | implementation dependent |
| rest-before, rest-after | <time> | none | x-weak | weak | medium | strong | x-strong | inherit | implementation dependent |
| rest | [ <'rest-before'> || <'rest-after'> ] | inherit | implementation dependent |
| cue-before, cue-after | <uri> [<number> | <percentage> | silent | x-soft | soft | medium | loud | x-loud] | none | inherit | none |
| cue | [ <'cue-before'> || <'cue-after'> ] | inherit | not defined for shorthand properties |
| mark-before, mark-after | <string> | none |
| mark | [ <'mark-before'> || <'mark-after'> ] | not defined for shorthand properties |
| voice-family | [[<specific-voice> | [<age>] <generic-voice>] [<number>],]* [<specific-voice> | [<age>] <generic-voice>] [<number>] | inherit | implementation dependent |
| voice-rate | <percentage> | x-slow | slow | medium | fast | x-fast | inherit | implementation dependent |
| voice-pitch | <number> | <percentage> | x-low | low | medium | high | x-high | inherit | medium |
| voice-pitch-range | <number> | x-low | low | medium | high | x-high | inherit | implementation dependent |
| voice-stress | strong | moderate | none | reduced | inherit | moderate |
| voice-duration | <time> | implementation dependent |
| phonemes | <string> | implementation dependent |
说明：
规定哪一块可以让机器来阅读。
- voice-volume：
- 设置音量
- voice-balance：
- 设置声音平衡
- speak：
- 设置阅读类型
- pause-before, pause-after：
- 设置暂停时的效果
- pause：
- 设置暂停
- rest-before, rest-after：
- 设置休止时的效果
- rest：
- 设置休止
- cue-before, cue-after：
- 设置提示时的效果
- cue：
- 设置提示
- mark-before, mark-after：
- 设置标注时的效果
- mark：
- 设置标注
- voice-family：
- 设置语系
- voice-rate：
- 设置比率
- voice-pitch：
- 设置音调
- voice-pitch-range：
- 设置音调范围
- voice-stress：
- 设置重音
- voice-duration：
- 设置音乐持续时间
- phonemes：
- 设置音位
兼容性：
| 类型 |  Internet Explorer |
 Firefox |
 Chrome |
 Opera |
 Safari |
|---|---|---|---|---|---|
| 版本 | (×)IE6 | (×)Firefox 2.0 | (×)Chrome 1.0.x | (√)Opera 9.63 | (×)Safari 3.1 |
| (×)IE7 | (×)Firefox 3.0 | (×)Chrome 2.0.x | (×)Safari 4 | ||
| (×)IE8 | |||||
示例：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="utf-8" />
<meta name="robots" content="all" />
<meta name="author" content="Tencent-ISRD" />
<meta name="Copyright" content="Tencent" />
<title>Speech</title>
<style type="text/css">
#speech-sample {voice-family: male;}
#voice-volume { -xv-voice-volume: x-soft; -xv-voice-balance: right; }
#voice-balance { -xv-voice-balance: left; }
#speech-cue { cue-after: url(img/ding.wav); }
#voice-rate { -xv-voice-rate: x-slow; }
#voice-family { voice-family: female; }
#voice-pitch { -xv-voice-pitch: x-low; }
#speech-speak { speak: spell-out; }
</style>
</head>
<body>
<div>
<div id="speech-sample" style="border: 1px solid #666; padding:5px; font-size:14px;">This is an example sentence styled with several CSS properties, including <span id="voice-volume">voice-volume,</span> <span id="voice-balance">voice-balance,</span> <span id="voice-rate">voice-rate,</span> <span id="voice-family">voice-family,</span> <span id="voice-pitch">voice-pitch,</span> <span id="speech-speak">speak</span> and <span id="speech-cue">cue-after.</span></div>
</div>
</body>
</html>