AS3 :: Click Sound At The Start Of Recording?

I'm currently recording sound and storing the byte array for playback and subsequent encoding to mp3.

Unfortunately though I am getting a click sound at the very beginning of the recording.

I have attempted a couple of methods to try to eliminate this such as:

recording the first .3 seconds with mic.gain = 0; then setting mic.gain = 50; clearing the byteArray after the first .3 seconds then continuing to write the bytearray (in effect deleting the first .3 seconds of the recording.)

Neither of those methods has stopped the click being added.

how I can prevent the click from being added?

Here is my recording/storing code:

public var mic:Microphone = Microphone.getMicrophone();
public var micSilence:uint;
private var soundBytes:ByteArray = new ByteArray();
private var soundBA:ByteArray = new ByteArray();

[Code].....