AudioContext.createBiquadFilter() - Web API 接口参考 编辑

AudioContext 的createBiquadFilter() 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!

• Desktop
• Mobile

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	10.0webkit	(Yes)	25.0 (25.0)	未实现	15.0 webkit 22	6.0webkit

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

 

相关

• Using the Web Audio API