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Is there a JavaScript equivalent to ActionScript's channel.leftPeak or channel.rightPeak. This is used for sound programming such as for a VU meter. I am trying to build a sound application, but I was avoiding using Flash and ActionScript since it is for a website. I was wondering if it was possible to do it in JavaScript. The basic concept is just play a song and be able to see the visualization of it through the spectrum analyzer or VU Meter.

Josue Espinosa
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lomas09
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    A VU meter is not an equalizer. A spectrum analyzer is not an equalizer. – Brad Jun 14 '12 at 20:52
  • well thats my bad. But the idea is there, I want to create a graphic visualizer, but I want to avoid actionsript and use javascript instead. Is it possible? – lomas09 Jun 14 '12 at 20:58
  • http://stackoverflow.com/a/3761407/362536 Unfortunately, your options are very limited. – Brad Jun 14 '12 at 20:59
  • [Similar question](http://stackoverflow.com/q/9516324/352796). – katspaugh Jun 14 '12 at 21:03
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    Just did a bit of browsing around, came back with the same answer as others here, doesn't look like it's entirely possible in all browsers/environments but here's some links that might help you get started for those that do offer support: http://www.schillmania.com/projects/soundmanager2/ http://html5doctor.com/html5-audio-the-state-of-play/ – shaunhusain Jun 14 '12 at 21:46
  • Removed Flash Tag since you not looking for a flash solution and added animation tag instead. – arttronics Jun 14 '12 at 22:21

1 Answers1

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What you need, based on your question, is JavaScript SoundManager2 plugin.

The demo page for the Spectrum Analyzer / VU Meter visuals are HERE

Screenshot: enter image description here


Edit: Also consider wavesurfer.js featuring "Seekable waveform using WebAudio and Canvas".

arttronics
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