AudioContext.createConvolver()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

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AudioContext的方法 createConvolver() 能创建一个 ConvolverNode，通常用来对你的音频应用混响效果。在 Convolution 规范定义 中查看更多信息。

语法

js
var audioCtx = new AudioContext();
var convolver = audioCtx.createConvolver();

返回值

ConvolverNode对象。

例子

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 (称之为脉冲响应,) 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。

更多完整例子请查看 Voice-change-O-matic demo (中 app.js 的代码)。

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;

规范

Specification
Web Audio API
# dom-baseaudiocontext-createconvolver

浏览器兼容性

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参见