ConstantSourceNode()

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ConstantSourceNode() 构造函数创建新 ConstantSourceNode object instance, representing an audio source which constantly outputs samples whose values are always the same.

句法

var constantSourceNode = new ConstantSourceNode(context, options);

参数

context


									AudioContext

representing the audio context you want the node to be associated with.

选项


								ConstantSourceOptions

dictionary object defining the properties you want the


								ConstantSourceNode

to have:

offset : A read-only AudioParam specifying the constant value generated by the source. The default is 1.0. The normal range is -1.0 to 1.0, but the value can be anywhere in the range from -Infinity to +Infinity .

范例

In this example, an audio context is created, then a ConstantSourceNode is established with its offset initialized to 0.5.

let audioContext = new AudioContext();
let myConstantSource = new ConstantSourceNode(audioContext, { offset: 0.5 });

注意 : The new ConstantSourceNode created by the constructor has a channelCount of 2.

规范

规范	状态	注释
Web 音频 API The definition of 'ConstantSourceNode: ConstantSourceNode' 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
`ConstantSourceNode()` 构造函数	Chrome 56	Edge ≤79	Firefox 52	IE No	Opera 43	Safari No	WebView Android 56	Chrome Android 56	Firefox Android 52	Opera Android 43	Safari iOS No	Samsung Internet Android 6.0

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完整支持
不支持

元数据

最后修改： 2019 年 3 月 23 日

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