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authorFlorian Merz <me@fiji-flo.de>2021-02-11 12:56:40 +0100
committerFlorian Merz <me@fiji-flo.de>2021-02-11 12:56:40 +0100
commit310fd066e91f454b990372ffa30e803cc8120975 (patch)
treed5d900deb656a5da18e0b60d00f0db73f3a2e88e /files/zh-cn/web/api/audiocontext/createconvolver
parent8260a606c143e6b55a467edf017a56bdcd6cba7e (diff)
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----
-title: AudioContext.createConvolver()
-slug: Web/API/AudioContext/createConvolver
-translation_of: Web/API/BaseAudioContext/createConvolver
----
-<p>{{ APIRef("Web Audio API") }}</p>
-
-<div>
-<p>{{ domxref("AudioContext") }}的方法<code>createConvolver()能创建一个</code>{{ domxref("ConvolverNode") }},通常用来对你的音频应用混响效果。在 <a href="http://webaudio.github.io/web-audio-api/#background-3">Convolution规范定义</a> 中查看更多信息。</p>
-</div>
-
-<h2 id="语法">语法</h2>
-
-<pre class="brush: js">var audioCtx = new AudioContext();
-var convolver = audioCtx.createConvolver();</pre>
-
-<h3 id="Description" name="Description">返回值</h3>
-
-<p>{{domxref("ConvolverNode")}}对象。</p>
-
-<h2 id="Examples" name="Examples">例子</h2>
-
-<p>下面的例子展示了一个 AudioContext 创建一个 混响器节点 的基本使用方法。基本前提是你创建一个包含声音样本的 AudioBuffer 用作混响环境 (称之为<em>脉冲响应</em>,) 和在混响器中应用。 下面的例子使用了一个简短的示例音乐厅人群效果,所以混响效果应用深度和回声。</p>
-
-<p>更多完整例子请查看<a href="http://mdn.github.io/voice-change-o-matic/">Voice-change-O-matic demo</a> (中<a href="https://github.com/mdn/voice-change-o-matic/blob/gh-pages/scripts/app.js">app.js的</a>代码)。</p>
-
-<pre class="brush: js">var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-var convolver = audioCtx.createConvolver();
-
- ...
-
-// grab audio track via XHR for convolver node
-
-var soundSource, concertHallBuffer;
-
-ajaxRequest = new XMLHttpRequest();
-ajaxRequest.open('GET', 'concert-crowd.ogg', true);
-ajaxRequest.responseType = 'arraybuffer';
-
-ajaxRequest.onload = function() {
-  var audioData = ajaxRequest.response;
-  audioCtx.decodeAudioData(audioData, function(buffer) {
-      concertHallBuffer = buffer;
-      soundSource = audioCtx.createBufferSource();
-      soundSource.buffer = concertHallBuffer;
-    }, function(e){"Error with decoding audio data" + e.err});
-}
-
-ajaxRequest.send();
-
- ...
-
-convolver.buffer = concertHallBuffer;</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-createConvolver-ConvolverNode', 'createConvolver()')}}</td>
- <td>{{Spec2('Web Audio API')}}</td>
- <td> </td>
- </tr>
- </tbody>
-</table>
-
-<h2 id="浏览器兼容">浏览器兼容</h2>
-
-<div>{{CompatibilityTable}}</div>
-
-<div id="compat-desktop">
-<table class="compat-table">
- <tbody>
- <tr>
- <th>Feature</th>
- <th>Chrome</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>{{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>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>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>