Flash Ignoring Volume Code, Brickwall Amp'ing All Sounds

Is this a bug or does the Flash IDE ignore source volume and brickwall it by default? Because I have a very quiet sound, but when imported, Flash shows the waveform wall to wall in the Library and plays it at max volume.

Then when I try to set the volume, first of all-- why isn’t this as simple as play(vol, loopcount, pan); and not this (which had no effect)

import flash.media.SoundTransform;
import flash.media.SoundChannel;

btn_Staging.addEventListener(MouseEvent.MOUSE_UP, goBtnStaging);
btn_Staging.buttonMode = true;

function goBtnStaging(event:MouseEvent):void
{
    btn_Staging.removeEventListener(MouseEvent.MOUSE_UP, goBtnStaging);
    mc_Staging.visible = true;
    mc_Staging.gotoAndPlay("Start");
    trace("btn_Staging Clicked");
    playSounds();
}

function playSounds():void
{
    // Load the Sounds
    var sfxHit:Sound = new SFXUITransition1();
    var sfxWarp:Sound = new SFXUILowWarp();
    
    //Setup the Channel
    var UISFXChannel:SoundChannel = new SoundChannel();
    var UISFXVol:SoundTransform = new SoundTransform();
    UISFXVol.volume = 0.2;
    UISFXChannel.soundTransform = UISFXVol;
    
    // Play the Sounds
    UISFXChannel = sfxHit.play();
    UISFXChannel = sfxWarp.play();

}

Any ideas?