From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

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+---
+title: MediaStreamAudioSourceNode
+slug: Web/API/MediaStreamAudioSourceNode
+tags:
+  - MediaStreamAudioSourceNode
+  - Web Audio API
+translation_of: Web/API/MediaStreamAudioSourceNode
+---
+<p>{{APIRef("Web Audio API")}}</p>
+
+<div>
+<p><code>MediaStreamAudioSourceNode</code> 接口代表一个音频接口，是<a href="/en-US/docs/WebRTC" title="/en-US/docs/WebRTC">WebRTC</a> {{domxref("MediaStream")}} (比如一个摄像头或者麦克风)的一部分。是个表现为音频源的{{domxref("AudioNode")}}。</p>
+</div>
+
+<p><code>MediaElementSourceNode没有输入，并且只有一个输出。创建之后使用</code> {{domxref("AudioContext.createMediaStreamSource")}}方法。输出通道的数量和{{domxref("AudioMediaStreamTrack")}}的通道数量相同。如果没有有效的媒体流，输出通道就变成一个静音的通道。</p>
+
+<table class="properties">
+ <tbody>
+  <tr>
+   <th scope="row">Number of inputs</th>
+   <td><code>0</code></td>
+  </tr>
+  <tr>
+   <th scope="row">Number of outputs</th>
+   <td><code>1</code></td>
+  </tr>
+  <tr>
+   <th scope="row">Channel count</th>
+   <td>由{{domxref("AudioMediaStreamTrack")}}定义，传递给 {{domxref("AudioContext.createMediaStreamSource")}} ，并由此创建。</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="构造器">构造器</h2>
+
+<dl>
+ <dt>{{domxref("MediaStreamAudioSourceNode.MediaStreamAudioSourceNode()")}}</dt>
+ <dd>创建一个新的<code>MediaStreamAudioSourceNode</code>实例。</dd>
+</dl>
+
+<h2 id="属性">属性</h2>
+
+<p><em>从</em><em>{{domxref("AudioNode")}}上继承。</em></p>
+
+<h2 id="方法">方法</h2>
+
+<p><em>从</em><em>{{domxref("AudioNode")}}上继承。</em></p>
+
+<h2 id="示例">示例</h2>
+
+<p>{{page("/zh-CN/docs/Web/API/AudioContext/createMediaStreamSource","示例")}}</p>
+
+<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', '#the-mediastreamaudiosourcenode-interface', 'MediaStreamAudioSourceNode')}}</td>
+   <td>{{Spec2('Web Audio API')}}</td>
+   <td> </td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="兼容性">兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>14 {{property_prefix("webkit")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("25")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>15 {{property_prefix("webkit")}}<br>
+    22 (unprefixed)</td>
+   <td>6 {{property_prefix("webkit")}}</td>
+  </tr>
+  <tr>
+   <td>Constructor</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</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>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Phone</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>28 {{property_prefix("webkit")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("25")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>6 {{property_prefix("webkit")}}</td>
+  </tr>
+  <tr>
+   <td>Constructor</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/zh-CN/docs/Web/API/Web_Audio_API/Using_Web_Audio_API">Using the Web Audio API</a></li>
+</ul>
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