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---
title: AudioContext.sampleRate
slug: Web/API/BaseAudioContext/sampleRate
translation_of: Web/API/BaseAudioContext/sampleRate
original_slug: Web/API/AudioContext/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>
{{Compat("api.BaseAudioContext.sampleRate")}}
<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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