Question : Can I capture mic data?

I was reading help.adobe.com about sampleDataEvent and it says this about capturing microphone.

Capturing Microphone audio Use the sampleData event to capture audio data from a microphone. When you add an event listener for the sampleData event, the Microphone dispatches the event as audio samples become available.

Does this mean I can capture audio from a mic and play it back?

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var soundBytes:ByteArray = new ByteArray();
 while(event.data.bytesAvailable)
 {
      var sample:Number = event.data.readFloat();
      soundBytes.writeFloat(sample);
 }

Answer : Can I capture mic data?

I guess it does. Here is the code.

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const DELAY_LENGTH:int = 4000;

var mic:Microphone = Microphone.getMicrophone();
mic.setSilenceLevel(0, DELAY_LENGTH);
mic.gain = 100;
mic.rate = 44;
mic.addEventListener(SampleDataEvent.SAMPLE_DATA, micSampleDataHandler);

var timer:Timer = new Timer(DELAY_LENGTH);
timer.addEventListener(TimerEvent.TIMER, timerHandler);
timer.start();

var soundBytes:ByteArray = new ByteArray();

function micSampleDataHandler(event:SampleDataEvent):void
{
    while(event.data.bytesAvailable)
    {
        var sample:Number = event.data.readFloat();
        soundBytes.writeFloat(sample);
    }
}

function timerHandler(event:TimerEvent):void
{        
    mic.removeEventListener(SampleDataEvent.SAMPLE_DATA, micSampleDataHandler);
    timer.stop();
    soundBytes.position = 0;
    var sound:Sound = new Sound();
    sound.addEventListener(SampleDataEvent.SAMPLE_DATA, playbackSampleHandler);
    sound.play();
}

function playbackSampleHandler(event:SampleDataEvent):void
{
    for (var i:int = 0; i < 8192 && soundBytes.bytesAvailable > 0; i++) 
    {
        var sample:Number = soundBytes.readFloat();
        event.data.writeFloat(sample);
        event.data.writeFloat(sample);
    }
}