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2011-01-18T01:35:48.880
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2011-01-18T01:35:48.880
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<p>You want to look at the <a href="http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/media/Microphone.html" rel="nofollow">Microphone class</a> to pick up sound off the mic, and at the <a href="http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/media/SoundMixer.html#computeSpectrum%28%29" rel="nofollow">computeSpectrum() method</a> to calculate frequency values for the equalizer. </p> <p>Here's an example of what you're trying to do, from the adobe samples:</p> <pre><code>package { import flash.display.Sprite; import flash.display.Graphics; import flash.events.Event; import flash.media.Sound; import flash.media.SoundChannel; import flash.media.SoundMixer; import flash.net.URLRequest; import flash.utils.ByteArray; import flash.text.TextField; public class SoundMixer_computeSpectrumExample extends Sprite { public function SoundMixer_computeSpectrumExample() { var snd:Sound = new Sound(); var req:URLRequest = new URLRequest("Song1.mp3"); snd.load(req); var channel:SoundChannel; channel = snd.play(); addEventListener(Event.ENTER_FRAME, onEnterFrame); channel.addEventListener(Event.SOUND_COMPLETE, onPlaybackComplete); } private function onEnterFrame(event:Event):void { var bytes:ByteArray = new ByteArray(); const PLOT_HEIGHT:int = 200; const CHANNEL_LENGTH:int = 256; SoundMixer.computeSpectrum(bytes, false, 0); var g:Graphics = this.graphics; g.clear(); g.lineStyle(0, 0x6600CC); g.beginFill(0x6600CC); g.moveTo(0, PLOT_HEIGHT); var n:Number = 0; for (var i:int = 0; i < CHANNEL_LENGTH; i++) { n = (bytes.readFloat() * PLOT_HEIGHT); g.lineTo(i * 2, PLOT_HEIGHT - n); } g.lineTo(CHANNEL_LENGTH * 2, PLOT_HEIGHT); g.endFill(); g.lineStyle(0, 0xCC0066); g.beginFill(0xCC0066, 0.5); g.moveTo(CHANNEL_LENGTH * 2, PLOT_HEIGHT); for (i = CHANNEL_LENGTH; i > 0; i--) { n = (bytes.readFloat() * PLOT_HEIGHT); g.lineTo(i * 2, PLOT_HEIGHT - n); } g.lineTo(0, PLOT_HEIGHT); g.endFill(); } private function onPlaybackComplete(event:Event):void { removeEventListener(Event.ENTER_FRAME, onEnterFrame); } }} </code></pre>
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