StereoPannerNode.pan

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pan 特性为 StereoPannerNode interface is an a-rate AudioParam representing the amount of panning to apply. The value can range between -1 (full left pan) and 1 (full right pan).

句法

var audioCtx = new AudioContext();
var panNode = audioCtx.createStereoPanner();
panNode.pan.value = -0.5;

Returned value

An a-rate AudioParam containing the panning to apply.

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

范例

In our StereoPannerNode example ( see source code ) HTML we have a simple <audio> element along with a slider <input> to increase and decrease pan value. In the JavaScript we create a MediaElementAudioSourceNode 和 StereoPannerNode , and connect the two together using the connect() method. We then use an oninput event handler to change the value of the StereoPannerNode.pan parameter and update the pan value display when the slider is moved.

Moving the slider left and right while the music is playing pans the music across to the left and right speakers of the output, respectively.

var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
var myAudio = document.querySelector('audio');
var panControl = document.querySelector('.panning-control');
var panValue = document.querySelector('.panning-value');
pre.innerHTML = myScript.innerHTML;
// Create a MediaElementAudioSourceNode
// Feed the HTMLMediaElement into it
var source = audioCtx.createMediaElementSource(myAudio);
// Create a stereo panner
var panNode = audioCtx.createStereoPanner();
// Event handler function to increase panning to the right and left
// when the slider is moved
panControl.oninput = function() {
  panNode.pan.setValueAtTime(panControl.value, audioCtx.currentTime);
  panValue.innerHTML = panControl.value;
}
// connect the MediaElementAudioSourceNode to the panNode
// and the panNode to the destination, so we can play the
// music and adjust the panning using the controls
source.connect(panNode);
panNode.connect(audioCtx.destination);

规范

规范	状态	注释
Web 音频 API The definition of 'pan' 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
`pan`	Chrome 41	Edge 12	Firefox 37	IE 不支持 No	Opera 28	Safari 不支持 No	WebView Android 41	Chrome Android 41	Firefox Android 37	Opera Android 28	Safari iOS 不支持 No	Samsung Internet Android 4.0

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

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句法

Returned value

范例

规范

浏览器兼容性

图例

另请参阅

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