Saving Microphone Recording IOS/Android

I'm currently capable of capturing audio using the microphone, but I would like some tips on saving it to the mobile device.

I'm being using the techniques described here to record and play audio through the microphone:

http://suzhiyam.wordpress.com/tag/using-microphone-in-as3/

The save technique used is this:

function onSave(evt:MouseEvent=null):void
{     hidePlayUI()     soundO.position=0     var o:ByteArray=enco.encode(soundO,1)     file.save(o,"sample.wav")     showPlayUI()
}

What is the best method to save an audio file from a ByteArray? Where does it actually save? How can I reference/load the saved audio file later in my application? Is FileReference the way to go or should I be using mediaPromise?

Thanks,

Tegan Snyder