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可以通过setInterval或requestAnimationFrame影响ScriptProcessor的onaudioprocess事件速度

[英]Can ScriptProcessor's onaudioprocess event speed be effected by setInterval or requestAnimationFrame

原文 2013-08-31 20:41:46 4 1 javascript/ setinterval/ web-audio-api/ requestanimationframe/ scriptprocessor

i am using Web Audio API's ScriptProcessor and it's onaudioprocess event for repetitive callbacks such as a metronome. 我正在使用Web Audio API的ScriptProcessor并且它是onaudioprocess事件，用于重复节拍器（例如节拍器）。

I tried using requestAnimationFrame and analyser node for audio visualisation in the same app. 我尝试在同一应用程序中使用requestAnimationFrame和analyser节点进行音频可视化。

It seems like the speed of which onaudioprocess event happens is being slowed down by half when trying to draw to a canvas using requestAnimationFrame or setInterval . 尝试使用requestAnimationFrame或setInterval绘制到canvas时，似乎onaudioprocess事件发生的速度降低了一半。

The question is, is it normal that other stuff can interrupt onaudioprocess speed? 问题是，其他东西可以中断onaudioprocess速度正常吗？ or am i doing something hugely wrong? 还是我做错了什么？

Or it is being effected by canvas drawing stuff? 还是受canvas绘画效果影响？ Because i tried using RAF and set Interval to log stuff to console and it did not effect anything. 因为我尝试使用RAF并将Interval设置为将内容记录到控制台，但它没有任何效果。

1 个解决方案

ScriptProcessor really shouldn't be used as an event source like that. 真的不应该将ScriptProcessor用作这样的事件源。 If you just want to build a metronome, I'd refer you to the HTML5Rocks article I wrote early this year - http://www.html5rocks.com/en/tutorials/audio/scheduling/ . 如果你只是想建立一个节拍器，我想请您看看的HTML5Rocks文章中，我在今年年初写的- http://www.html5rocks.com/en/tutorials/audio/scheduling/ 。