ChannelMergerNode

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构造函数
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方法
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规范
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ChannelMergerNode interface, often used in conjunction with its opposite, ChannelSplitterNode , reunites different mono inputs into a single output. Each input is used to fill a channel of the output. This is useful for accessing each channels separately, e.g. for performing channel mixing where gain must be separately controlled on each channel.

若 ChannelMergerNode has one single output, but as many inputs as there are channels to merge; the number of inputs is defined as a parameter of its constructor and the call to AudioContext.createChannelMerger . In the case that no value is given, it will default to 6 .

使用 ChannelMergerNode , it is possible to create outputs with more channels than the rendering hardware is able to process. In that case, when the signal is sent to the AudioContext.listener object, supernumerary channels will be ignored.

输入数	variable; default to `6` .
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

ChannelMergerNode(): 创建新的 ChannelMergerNode 对象实例。

特性

No specific property; inherits properties from its parent, AudioNode .

方法

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

范例

The following example shows how you could separate a stereo track (say, a piece of music), and process the left and right channel differently. To use them, you need to use the second and third parameters of the AudioNode.connect(AudioNode) method, which allow you to specify both the index of the channel to connect from and the index of the channel to connect to.

var ac = new AudioContext();
ac.decodeAudioData(someStereoBuffer, function(data) {
 var source = ac.createBufferSource();
 source.buffer = data;
 var splitter = ac.createChannelSplitter(2);
 source.connect(splitter);
 var merger = ac.createChannelMerger(2);
 // Reduce the volume of the left channel only
 var gainNode = ac.createGain();
 gainNode.gain.setValueAtTime(0.5, ac.currentTime);
 splitter.connect(gainNode, 0);
 // Connect the splitter back to the second input of the merger: we
 // effectively swap the channels, here, reversing the stereo image.
 gainNode.connect(merger, 0, 1);
 splitter.connect(merger, 1, 0);
 var dest = ac.createMediaStreamDestination();
 // Because we have used a ChannelMergerNode, we now have a stereo
 // MediaStream we can use to pipe the Web Audio graph to WebRTC,
 // MediaRecorder, etc.
 merger.connect(dest);
});

规范

规范	状态	注释
Web 音频 API The definition of 'ChannelMergerNode' 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
`ChannelMergerNode`	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
`ChannelMergerNode()` 构造函数	Chrome 55	Edge ≤79	Firefox 53	IE 不支持 No	Opera 42	Safari ?	WebView Android 55	Chrome Android 55	Firefox Android 53	Opera Android 42	Safari iOS ?	Samsung Internet Android 6.0

图例

完整支持
不支持
兼容性未知 ?

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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

浏览器兼容性

图例

另请参阅

相关话题