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.
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
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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