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---
title: AudioContext.sampleRate
slug: Web/API/AudioContext/sampleRate
translation_of: Web/API/BaseAudioContext/sampleRate
---
<p>{{ APIRef("Web Audio API") }}</p>
<div>
<p>{{ domxref("AudioContext") }}的<code>sampleRate属性</code>返回一个浮点数表示采样率（每秒采样数）， 同一个AudioContext中的所有节点采样率相同，所以不支持采样率转换。</p>
</div>
<h2 id="语法">语法</h2>
<pre class="brush: js">var audioCtx = new AudioContext();
var mySampleRate = audioCtx.sampleRate;</pre>
<h3 id="返回值">返回值</h3>
<p>A floating point number.</p>
<h2 id="例子">例子</h2>
<div class="note">
<p><strong>注意：</strong>想要完整的Web Audio实例，可以查看<a href="https://github.com/mdn/" style="font-style: italic; background-color: rgba(231, 228, 157, 0.247059);">MDN Github repo</a>上的Web Audio Demo，比如<a href="https://github.com/mdn/panner-node">panner-node</a>。不妨试试在浏览器控制台输入<code>audioCtx.sampleRate</code></p>
</div>
<pre class="brush: js;highlight[8]">var AudioContext = window.AudioContext || window.webkitAudioContext;
var audioCtx = new AudioContext();
// Older webkit/blink browsers require a prefix
...
console.log(audioCtx.sampleRate);
</pre>
<h2 id="规范">规范</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 Audio API', '#widl-AudioContext-sampleRate', 'sampleRate')}}</td>
<td>{{Spec2('Web Audio API')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</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(10.0)}}{{property_prefix("webkit")}}</td>
<td>{{CompatGeckoDesktop(25.0)}} </td>
<td>{{CompatNo}}</td>
<td>15.0{{property_prefix("webkit")}}<br>
22 (unprefixed)</td>
<td>6.0{{property_prefix("webkit")}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>Firefox OS</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
<th>Chrome for Android</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatUnknown}}</td>
<td>26.0</td>
<td>1.2</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>33.0</td>
</tr>
</tbody>
</table>
</div>
<h2 id="另见">另见</h2>
<ul>
<li><a href="/en-US/docs/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio API</a></li>
</ul>
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