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+---
+title: AudioContext.createChannelSplitter()
+slug: Web/API/BaseAudioContext/createChannelSplitter
+translation_of: Web/API/BaseAudioContext/createChannelSplitter
+original_slug: Web/API/AudioContext/createChannelSplitter
+---
+<p>{{ APIRef("Web Audio API") }}</p>
+
+<div>
+<p>The <code>createChannelSplitter()</code> method of the {{ domxref("AudioContext") }} Interface is used to create a {{domxref("ChannelSplitterNode")}}, which is used to access the individual channels of an audio stream and process them separately.</p>
+</div>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="brush: js">var audioCtx = new AudioContext();
+var splitter = audioCtx.createChannelSplitter(2);</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>numberOfOutputs</dt>
+ <dd>你期待将输入音频分割成的声道道数目; 当不传入参数时，默认为6</dd>
+</dl>
+
+<h3 id="Returns">Returns</h3>
+
+<p>一个 {{domxref("ChannelSplitterNode")}}.</p>
+
+<h2 id="Example">Example</h2>
+
+<p>下面这个简单的例子告诉你怎样分割一个双声道音轨 (或者说一段音乐), 以及对于左右声道不同的处理. 要使用它们, 你需要用到{{domxref("AudioNode.connect(AudioNode)") }}方法的第二个和第三个参数, 他们会指定链接声道源的序号和链接到的声道序号.</p>
+
+<pre class="brush: js;highlight[5,12,17]">var ac = new AudioContext();
+ac.decodeAudioData(someStereoBuffer, function(data) {
+ var source = ac.createBufferSource();
+ source.buffer = data;
+ var splitter = ac.createChannelSplitter(2);
+ source.connect(splitter);
+ var merger = ac.createChannelMerger(2);
+
+ // Reduce the volume of the left channel only
+ var gainNode = ac.createGain();
+ gainNode.gain.value = 0.5;
+ splitter.connect(gainNode, 0);
+
+ // Connect the splitter back to the second input of the merger: we
+ // effectively swap the channels, here, reversing the stereo image.
+ gainNode.connect(merger, 0, 1);
+ splitter.connect(merger, 1, 0);
+
+ var dest = ac.createMediaStreamDestination();
+
+ // Because we have used a ChannelMergerNode, we now have a stereo
+ // MediaStream we can use to pipe the Web Audio graph to WebRTC,
+ // MediaRecorder, etc.
+ merger.connect(dest);
+});</pre>
+
+<h2 id="规格">规格</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规格</th>
+   <th scope="col">状态</th>
+   <th scope="col">注释</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Web Audio API', '#widl-AudioContext-createChannelSplitter-ChannelSplitterNode-unsigned-long-numberOfOutputs', 'createChannelSplitter()')}}</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>Edge</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>{{CompatVersionUnknown}}</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>Edge</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>{{CompatVersionUnknown}}</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>