BiquadFilterNode.gain

在此页

句法
范例
规范
浏览器兼容性
另请参阅
相关话题

gain 特性为 BiquadFilterNode interface Is a a-rate AudioParam , a double representing the gain used in the current filtering algorithm.

When it takes a positive value it is a real gain, when negative it is an attenuation.

It is expressed in dB, has a default value of 0 and can take a value in a nominal range of -40 to 40 .

句法

var audioCtx = new AudioContext();
var biquadFilter = audioCtx.createBiquadFilter();
biquadfilter.gain.value = 25;

注意 : Though the AudioParam returned is read-only, the value it represents is not.

值

AudioParam .

范例

The following example shows basic usage of an AudioContext to create a Biquad filter node. For a complete working example, check out our voice-change-o-matic demo (look at the 源代码 too).

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;

规范

规范	状态	注释
Web 音频 API The definition of 'gain' in that specification.	工作草案

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
`gain`	Chrome 14	Edge 12	Firefox 25	IE 不支持 No	Opera 15	Safari 6	WebView Android Yes	Chrome Android 18	Firefox Android 26	Opera Android 14	Safari iOS Yes	Samsung Internet Android 1.0

图例

完整支持
不支持

另请参阅

使用 Web 音频 API

元数据

最后修改： 2020 年 1 月 22 日

Web 音频 API
BiquadFilterNode
构造函数
1. BiquadFilterNode()
特性
1. detune
2. frequency
3. gain
4. Q
5. type
方法
1. getFrequencyResponse()
继承：
1. AudioNode
2. EventTarget
Related pages for Web Audio API

在此页

句法

值

范例

规范

浏览器兼容性

图例

另请参阅

相关话题