以前,在Flex2刚发布时,有人说AS3.0能够编辑声音,方法是用ByteArray与SoundMixer。但被证明这是假的,SoundMixer能读不能写!
但现在新的方法出现了!把声音用SWF的格式写到ByteArray里,再用Loader读进来,最后把它变为Sound!
实现这个的是Andre Michelle 与 Joa Ebert 开发的popforge Project。
Sample:
package {
import de.popforge.audio.output.Audio;
import de.popforge.audio.output.AudioBuffer;
import de.popforge.audio.output.Sample;
import de.popforge.audio.output.SoundFactory;
import flash.display.Sprite;
import flash.events.Event;
import flash.utils.describeType;
import flash.media.Sound;
public class popforge extends Sprite
{
public function popforge()
{
var samples:Array = [];
var phase:Number = 2;
var freq:Number = 0.12
for( var i: int = 0 ; i < 44100*3 ; i++ ) {
//-- create an amplitude [-1,1]
var amplitude:Number = Math.sin( phase * Math.PI * 2 );
//-- create a sample
var sample:Sample = new Sample( amplitude, amplitude );
//-- push in array
samples.push( sample );
//-- increase phase
phase += freq / Audio.RATE44100;
}
SoundFactory.fromArray(samples,
Audio.MONO,
Audio.BIT16,
Audio.RATE44100,
func);
}
private function func(event:Sound):void {
event.play();
}
}
}
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