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: ConvolverNode
+slug: Web/API/ConvolverNode
+tags:
+  - 音效
+  - 音频
+translation_of: Web/API/ConvolverNode
+---
+<p>{{APIRef("Web Audio API")}}</p>
+
+<p><code>ConvolverNode</code> 接口是一个对给定 {{domxref("AudioBuffer")}} 上执行线性卷积的 {{domxref("AudioNode")}}，一般用来做音频混响效果。每一个 <code>ConvolverNode</code> 都会有一个输入值和输出值。</p>
+
+<div class="note">
+<p><strong>注意</strong>: 更多线性卷积理论的相关信息，请参阅<a href="https://en.wikipedia.org/wiki/Convolution">Convolution article on Wikipedia</a>.</p>
+</div>
+
+<table class="properties">
+ <tbody>
+  <tr>
+   <th scope="row">Number of inputs</th>
+   <td><code>1</code></td>
+  </tr>
+  <tr>
+   <th scope="row">Number of outputs</th>
+   <td><code>1</code></td>
+  </tr>
+  <tr>
+   <th scope="row">Channel count mode</th>
+   <td><code>"clamped-max"</code></td>
+  </tr>
+  <tr>
+   <th scope="row">Channel count</th>
+   <td><code>1</code>, <code>2</code>, or <code>4</code></td>
+  </tr>
+  <tr>
+   <th scope="row">Channel interpretation</th>
+   <td><code>"speakers"</code></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="构造函数">构造函数</h2>
+
+<dl>
+ <dt>{{domxref("ConvolverNode.ConvolverNode()", "ConvolverNode()")}}</dt>
+ <dd>创建一个新的 <span><code>ConvolverNode</code></span> 对象实例。</dd>
+</dl>
+
+<h2 id="属性">属性</h2>
+
+<p>继承其父级的属性<em>, {{domxref("AudioNode")}}</em>.</p>
+
+<dl>
+ <dt>{{domxref("ConvolverNode.buffer")}}</dt>
+ <dd>一个被 <span><code>ConvolverNode</code></span> 用来产生混响效果的单声道、立体声或四声道的音频缓冲器，包含了(可能是多声道)脉冲反应(IR)。</dd>
+ <dt>{{domxref("ConvolverNode.normalize")}}</dt>
+ <dd><span>布尔值，在设置缓冲区属性时，可绝定是否对来自 <code>buffer</code> 的脉冲反应按等功率归一化进行缩放。</span></dd>
+</dl>
+
+<h2 id="方法">方法</h2>
+
+<p>没有具体的方法，从其父继承方法，<em>{{domxref("AudioNode")}}</em>.</p>
+
+<h2 id="ConvolverNode_例子">ConvolverNode 例子</h2>
+
+<p>下面的示例展示了 AudioContext 创建卷积节点的基础用法。</p>
+
+<div class="note">
+<p><strong>注意</strong>: 你需要找到一个脉冲反应来完成下面的示例。可查看 <a href="https://codepen.io/DonKarlssonSan/pen/doVKRE">此处</a> 的实例.</p>
+</div>
+
+<pre class="brush: js notranslate">let audioCtx = new window.AudioContext();
+
+async function createReverb() {
+    let convolver = audioCtx.createConvolver();
+
+    // 从文件加载脉冲反应
+    let response     = await fetch("path/to/impulse-response.wav");
+    let arraybuffer  = await response.arrayBuffer();
+    convolver.buffer = await audioCtx.decodeAudioData(arraybuffer);
+
+    return convolver;
+}
+
+...
+
+let reverb = await createReverb();
+
+// someOtherAudioNode -&gt; reverb -&gt; destination
+someOtherAudioNode.connect(reverb);
+reverb.connect(audioCtx.destination);
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">规范</th>
+   <th scope="col">状态</th>
+   <th scope="col">注释</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Web Audio API', '#ConvolverNode', 'ConvolverNode')}}</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>
+
+
+<p>{{Compat("api.ConvolverNode")}}</p>
+</div>
+
+<h2 id="相关链接">相关链接</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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