IIRFilterNode()

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IIRFilterNode() constructor of the Web 音频 API creates a new IIRFilterNode object which an AudioNode processor which implements a general infinite impulse response filter.

句法

var iIRFilterNode = new IIRFilterNode(context, options)

参数

Inherits parameters from the AudioNodeOptions dictionary .

context

A reference to an


									AudioContext

选项

Options are as follows:

feedforward : A sequence of feedforward coefficients.
feedback : A sequence of feedback coefficients.

Unlike other nodes in the Web Audio API, the options passed into the IIR filter upon creation are not optional. The filter needs these values to work and with the vast range of filters available, there is no default.

返回值

新的 IIRFilterNode 对象实例。

范例

let feedForward = [0.00020298, 0.0004059599, 0.00020298];
let feedBackward = [1.0126964558, -1.9991880801, 0.9873035442];
const AudioContext = window.AudioContext || window.webkitAudioContext;
const audioCtx = new AudioContext();
const iirFilter = new IIRFilterNode(audioCtx, { feedforward: feedForward, feedback: feedBackward });

规范

规范	状态	注释
Web 音频 API The definition of 'IIRFilterNode()' in that specification.	工作草案	初始定义。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`IIRFilterNode()` 构造函数	Chrome 55 注意事项 55 注意事项 Before version 59, the default values were not supported.	Edge ≤79	Firefox 53	IE 不支持 No	Opera 42	Safari ?	WebView Android 55 注意事项 55 注意事项 Before version 59, the default values were not supported.	Chrome Android 55	Firefox Android 53	Opera Android 42	Safari iOS ?	Samsung Internet Android 6.0 注意事项 6.0 注意事项 Before Samsung Internet 7.0, the default values were not supported.

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完整支持
不支持
兼容性未知 ?

元数据

最后修改： 2019 年 3 月 23 日

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句法

参数

返回值

范例

规范

浏览器兼容性

图例

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