AudioContext.createBiquadFilter()

AudioContextcreateBiquadFilter() 方法创建了一个  BiquadFilterNode, 它提供了一个可以指定多个不同的一般滤波器类型的双二阶滤波器。

语法

var audioCtx = new AudioContext();
var biquadFilter = audioCtx.createBiquadFilter();

返回

一个 BiquadFilterNode.

示例

这个例子展示了一个利用AudioContext 创建四项滤波器节点( Biquad filter node)的例子。想要查看完整工作的示例,请查看我们的For voice-change-o-matic 样例 (也可以查看  源码 ).

var audioCtx = new (window.AudioContext || window.webkitAudioContext)();

//set up the different audio nodes we will use for the app
var analyser = audioCtx.createAnalyser();
var distortion = audioCtx.createWaveShaper();
var gainNode = audioCtx.createGain();
var biquadFilter = audioCtx.createBiquadFilter();
var convolver = audioCtx.createConvolver();

// connect the nodes together

source = audioCtx.createMediaStreamSource(stream);
source.connect(analyser);
analyser.connect(distortion);
distortion.connect(biquadFilter);
biquadFilter.connect(convolver);
convolver.connect(gainNode);
gainNode.connect(audioCtx.destination);

// Manipulate the Biquad filter

biquadFilter.type = "lowshelf";
biquadFilter.frequency.value = 1000;
biquadFilter.gain.value = 25;

规格

Specification Status Comment
Web Audio API
createBiquadFilter()
Working Draft  

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)
Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 10.0webkit (en-US) (Yes) 25.0 (25.0)  未实现 15.0 webkit (en-US)
22
6.0webkit (en-US)
Feature Android Edge Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ? (Yes) 26.0 1.2 ? ? ? 33.0

 

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