DelayNode | Web API

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构造函数
特性
方法
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DelayNode 接口表示 delay-line ; an AudioNode audio-processing module that causes a delay between the arrival of an input data and its propagation to the output. A DelayNode always has exactly one input and one output, both with the same amount of channels.

The DelayNode acts as a delay-line, here with a value of 1s.

When creating a graph that has a cycle, it is mandatory to have at least one DelayNode in the cycle, or the nodes taking part in the cycle will be muted.

输入数	`1`
输出数	`1`
通道计数模式	`"max"`
通道计数	`2` (不用于默认计数模式)
通道解释	`"speakers"`

构造函数

DelayNode(): Creates a new instance of an DelayNode object instance. Alternatively, you can use the BaseAudioContext.createDelay() factory method.

特性

继承的特性来自其父级， AudioNode .

DelayNode.delayTime 只读: 是 a-rate AudioParam representing the amount of delay to apply, specified in seconds.

方法

No specific methods; inherits methods from its parent, AudioNode .

范例

We have created a simple example that allows you to play three different samples on a constant loop — see create-delay (you can also view the source code ). If you just press the play buttons, the loops will start immediately; if you slide the sliders up to the right, then press the play buttons, a delay will be introduced, so the looping sounds don't start playing for a short amount of time.

var AudioContext = window.AudioContext || window.webkitAudioContext;
var audioCtx = new AudioContext();
var synthDelay = audioCtx.createDelay(5.0);
  ...
var synthSource;
playSynth.onclick = function() {
  synthSource = audioCtx.createBufferSource();
  synthSource.buffer = buffers[2];
  synthSource.loop = true;
  synthSource.start();
  synthSource.connect(synthDelay);
  synthDelay.connect(destination);
  this.setAttribute('disabled', 'disabled');
}
stopSynth.onclick = function() {
  synthSource.disconnect(synthDelay);
  synthDelay.disconnect(destination);
  synthSource.stop();
  playSynth.removeAttribute('disabled');
}
...
var delay1;
rangeSynth.oninput = function() {
  delay1 = rangeSynth.value;
  synthDelay.delayTime.setValueAtTime(delay1, audioCtx.currentTime);
}

规范

规范	状态	注释
Web 音频 API The definition of 'DelayNode' 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
`DelayNode`	Chrome 14	Edge ≤18	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
`DelayNode()` 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.
`delayTime`	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
兼容性未知 ?

另请参阅

使用 Web 音频 API

元数据

最后修改： May 25, 2020

在此页

构造函数

特性

方法

范例

规范

浏览器兼容性

图例

另请参阅

相关话题