StereoPannerNode

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StereoPannerNode 接口在 Web 音频 API represents a simple stereo panner node that can be used to pan an audio stream left or right. It is an AudioNode audio-processing module that positions an incoming audio stream in a stereo image using a low-cost equal-power panning algorithm .

pan property takes a unitless value between -1 (full left pan) and 1 (full right pan). This interface was introduced as a much simpler way to apply a simple panning effect than having to use a full PannerNode .

输入数	`1`
输出数	`1`
通道计数模式	`"clamped-max"`
通道计数	`2`
通道解释	`"speakers"`

构造函数

StereoPannerNode(): 创建新的实例化 StereoPannerNode 对象。

特性

继承的特性来自其父级， AudioNode .

StereoPannerNode.pan 只读: 是 a-rate AudioParam representing the amount of panning to apply.

方法

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

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 'StereoPannerNode' in that specification.	工作草案	初始定义

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
`StereoPannerNode`	Chrome 41	Edge ≤18	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
`StereoPannerNode()` 构造函数	Chrome 55	Edge ≤79	Firefox 53	IE 不支持 No	Opera 42	Safari 不支持 No	WebView Android 55 注意事项 55 注意事项 Before Chrome 59, the default values were not supported.	Chrome Android 55 注意事项 55 注意事项 Before Chrome 59, the default values were not supported.	Firefox Android 53	Opera Android 42	Safari iOS 不支持 No	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.
`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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构造函数

特性

方法

范例

规范

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图例

另请参阅

相关话题