How to control an m4a file - actionscript-3

Question

I am playing m4a files that require that I use a NetStream object and want to control the audio with a SoundChannel object (because that is the only way I know to sync an HSlider control with an audio file). My problem is that I cannot connect the Sound Channel with the audio source. The event handler button1_clickHandler does not even regognize the existance of the SoundChannel object. Is there a way to control this type of audio file with a SoundChannel? If not, how can I set the position of the HSlider-- I've tried using HSlider.value, but that somehow gets overridden.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600" creationComplete="init()">
<mx:Script>
<![CDATA[
private var audioExample:AudioExample_M4A;
public function init():void{
audioExample = new AudioExample_M4A();
}
private function button1_clickHandler(event:MouseEvent):void{
if(audioExample.soundChannel){
audioExample.soundChannel.stop()
trace("Yes")
}else{
trace("No")
}
}
]]>
</mx:Script>
<mx:Button label="Play / Pause" click="button1_clickHandler(event)"/>
</mx:Application>
Here is the class file AudioExample_M4A.as:
package {
import flash.display.Sprite;
import flash.events.*;
import flash.media.SoundChannel;
import flash.media.Video;
import flash.net.NetConnection;
import flash.net.NetStream;
public class AudioExample_M4A extends Sprite {
public var soundChannel:SoundChannel= new SoundChannel();;
public var temp:String = new String()
public var audioURL:String = "badge.m4a";
private var connection:NetConnection;
public var stream:NetStream;
public function AudioExample_M4A() {
connection = new NetConnection();
connection.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
connection.connect(null);
}
private function netStatusHandler(event:NetStatusEvent):void {
switch (event.info.code) {
case "NetConnection.Connect.Success":
connectStream();
break;
case "NetStream.Play.StreamNotFound":
break;
}
}
private function connectStream():void {
stream = new NetStream(connection);
stream.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
stream.client={onMetaData:function(obj:Object):void{
trace("metadata: duration=" + obj.duration);
}
}
soundChannel = stream.play(audioURL) as SoundChannel;
}
}}

Answer 1

You cannot control a NetStream object with a SoundChannel object. These are two completely different methods to playing media and, as far as I know, do not share a common base.
To allow for a slider to control the pointer position, you need to do the following:
Get the slider position as a percentage (slider.position * slider.minimum/slider.maximum in Spark, not sure about in MX)
Get the duration of the song. This is retrieved via NetStream.onMetaData
Call NetStream.seek() with an argument of slider percentage multiplied by duration (seek() expects the value in seconds). So NetStream.seek( duration * positionPercentage )