ActionScript 3.0 :: Audio Progress Bar Scrubbing/slider?

I have an audio progress bar that I have created. It uses the following code:

Code:
import flash.events.Event;progress_bar_inst.tb_mc.scaleX = 0;
addEventListener(Event.ENTER_FRAME,EnterFrame);
function EnterFrame(evt:Event):void {
progress_bar_inst.tb_mc.scaleX = instructor_audio.currentFrame/instructor_audio.totalFrames;
}

It works great! But I would like to add the ability to "scrub" or use a slider to move forward and back in the audio clip. (like it does with FLV Playback component) I have no idea how to do this. DOes anyone have any info on this, or is there an easy way to add to my existing code to add this functionality?