BaseAudioContext.createOscillator()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
BaseAudioContext 接口的 createOscillator() 方法创建一个 OscillatorNode，它是一个表示周期性波形的源。它基本上产生一个不变的音调。
Syntax
var oscillatorNode = audioCtx.createOscillator();
Returns
An OscillatorNode.
Example
以下示例显示了用于创建振荡器节点的 AudioContext 的基本用法。有关应用示例/信息，请查看我们的Violent Theremin demo（有关相关代码，请参阅see app.js）; 另请参阅我们的 OscillatorNode 页面以获取更多信息。
js
// create web audio api context
var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
// create Oscillator node
var oscillator = audioCtx.createOscillator();
oscillator.type = "square";
oscillator.frequency.setValueAtTime(3000, audioCtx.currentTime); // value in hertz
oscillator.connect(audioCtx.destination);
oscillator.start();
Specifications
| Specification |
|---|
| Web Audio API # dom-baseaudiocontext-createoscillator |
Browser compatibility
BCD tables only load in the browser