HTML5音频 - 分析输出？ [英] HTML5 Audio -- analyzing output?

问题描述

有没有办法直接分析音频标签内容的输出，并使用输出？更清楚的是，我想要做的是使用音频内容的声级来使球反弹更高或更低（使用html5画布），具体取决于声音的级别。

Is there a way to directly analyze the output of the content of an audio tag, and use the output? To be more clear, what I want to do is use the sound levels of the audio content to make a ball bounce higher or lower (using html5 canvas) depending on the level of the sound.

例如，如果有类似audioElement.getVolumeLevel（）的东西会很方便，虽然我不知道是否存在这样的东西。

For example, it would be really handy if there was something like audioElement.getVolumeLevel(), although I don't know if such a thing exists.

此外，这个问题具体是关于使用音频元素。我知道其他方法，但我认为这可能最适合我现在正在做的事情 - 如果存在一个简单的解决方案，那么我宁愿不必将额外的库带入我的东西。

Also, this question is specifically about using the audio element. I am aware of other methods, but I thought that this would probably work best with what I'm doing right now -- and if a simple solution exists, then I'd rather not have to bring extra libraries into my stuff.

推荐答案

在Firefox中，它是可能的，但据我所知它还没有标准化（Chrome也可能支持它）：

In Firefox, it's possible but it's not yet standardized as far as I know ( Chrome probably supports it as well ):

https://wiki.mozilla.org/Audio_Data_API

Webkit API提案： https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html

Webkit API proposal: https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html

以及一些相关文章/演示：

And a handful of related articles / demos:

http ：//ajaxian.com/by/topic/sound

http://ajaxian.com/archives/amazing-audio-api-javascript-demos

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