ScriptProcessorNode: audioprocess event

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弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the 兼容性表格 at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The audioprocess event of the ScriptProcessorNode interface is fired when an input buffer of a script processor is ready to be processed.

冒泡	No
可取消	No
Default action	None
接口	`AudioProcessingEvent`
事件处理程序特性	`ScriptProcessorNode.onaudioprocess`

范例

scriptNode.addEventListener('audioprocess', function(audioProcessingEvent) {
  // The input buffer is a song we loaded earlier
  var inputBuffer = audioProcessingEvent.inputBuffer;
  // The output buffer contains the samples that will be modified and played
  var outputBuffer = audioProcessingEvent.outputBuffer;
  // Loop through the output channels (in this case there is only one)
  for (var channel = 0; channel < outputBuffer.numberOfChannels; channel++) {
    var inputData = inputBuffer.getChannelData(channel);
    var outputData = outputBuffer.getChannelData(channel);
    // Loop through the 4096 samples
    for (var sample = 0; sample < inputBuffer.length; sample++) {
      // make output equal to the same as the input
      outputData[sample] = inputData[sample];
      // add noise to each output sample
      outputData[sample] += ((Math.random() * 2) - 1) * 0.2;
    }
  }
})

You could also set up the event handler using the ScriptProcessorNode.onaudioprocess 特性：

scriptNode.onaudioprocess = function(audioProcessingEvent) {
  ...
}

规范

规范	状态	注释
Web 音频 API The definition of 'AudioProcessingEvent' 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
`audioprocess` event 弃用	Chrome 14 Prefixed 14 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox 25	IE No	Opera 22 22 15 Prefixed Prefixed Implemented with the vendor prefix: webkit	Safari 6 Prefixed 6 Prefixed Prefixed Implemented with the vendor prefix: webkit	WebView Android Yes	Chrome Android Yes	Firefox Android 25	Opera Android 22 22 14 Prefixed Prefixed Implemented with the vendor prefix: webkit	Safari iOS 6 Prefixed 6 Prefixed Prefixed Implemented with the vendor prefix: webkit	Samsung Internet Android Yes

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