BaseAudioContext.createOscillator() - Web API 接口参考 编辑

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。

// 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	Status	Comment
Web Audio API createOscillator	Working Draft

Browser compatibility

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See also

• Using the Web Audio API