ActionScript 3.0 :: XML Driven Audio Virtualizer Code - Return Value ?

This is one of those projects I've been nursing for a while to help better myself with as3, but I've hit a point in the code where I'm just going around in circles now and can't seem to figure out how to get out of it.  This project still has a few more problems after that, but I'll deal with those, for now, the situation is, here is a compressed file of my files

it contains:
the flash file which just targets the main .as file
assets -> packages -> and three .as files
music.xml

to save space I left out the 2 .mp3 files, for testing purposes if you really need them, I'll host them up, but otherwise if you need to test it and you have some .mp3's lying around, the <fsong> in the xml file is the mp3 file name.

so here's the issue: What I'm building is a flash audio player and virtualizer that will feed off of the music.xml, parse the data into info at the bottom, and eventually those song links will actually be active and choose the song, but that is something I'll figure out later.Right now, if I hard code in the song title "currently symptoms is hard coded in" it plays fine no problems, however what I want it to read is the first [fsong] in the xml file, so that I don't have to mainly change the as files, and that's where I've been going around in a circle.if you look at LoadSongXML.as at the top inside the public class LoadSongXML extends Sprite .there is public var initSong:String = "symptoms"; and public const SOUND_URL:String = initSong + ".mp3"; to control what gets called and played initially.

in public funciton completeListener(event:Event){

I have var initSong:String = songFile[1]; I can trace that value as you see in the line below just fine, but when I try to return the value so I can actually use it, I can't seem to access it, and I don't know how to get that function to return the value up so that I can actually access it.I've tried moving the various xml arrays out of the function so that they are in the same level, but that ends up breaking it.I originally had the public const SOUND_URL:String = initSong + ".mp3"; line in SpectrumDisplay.as and tried to pull the data to that, but to no avail, even tried adding the xml parser to that actionscript, but that ends up breaking over there as well.