---
title: BaseAudioContext.createConstantSource()
slug: Web/API/BaseAudioContext/createConstantSource
translation_of: Web/API/BaseAudioContext/createConstantSource
---
<p>{{APIRef("Web Audio API")}}</p>

<p><span class="seoSummary"> <strong><code>createConstantSource()</code></strong> 是 {{domxref("BaseAudioContext")}} 接口的一个方法， 用于生成一个 {{domxref("ConstantSourceNode")}} 对象, 该对象是一个输出单信道（one-channel）音频信号的音频源，这些音频信号都拥有一个恒定的样本值。</span></p>

<h2 id="Syntax">Syntax</h2>

<pre class="syntaxbox">var constantSourceNode = AudioContext.createConstantSource()</pre>

<h3 id="Parameters">Parameters</h3>

<p>None.</p>

<h3 id="Returns">Returns</h3>

<p>A {{domxref('ConstantSourceNode')}} instance.</p>

<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 Audio API','#dom-baseaudiocontext-createconstantsource','createConstantSource()')}}</td>
   <td>{{Spec2('Web Audio API')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_Compatibility">Browser Compatibility</h2>

{{Compat("api.BaseAudioContext.createConstantSource")}}