MACROMEDIA FLASH 8-FLASH LITE 2.X ACTIONSCRIPT LANGUAGE Reference page 601

Example
The following example dynamically creates two text fields that display the bytes that are
loaded and the total number of bytes for a sound file that loads into the SWF file. A text field
also displays a message when the file finishes loading. Add the following ActionScript to your
FLA or AS file:
this.createTextField("message_txt", this.getNextHighestDepth(),
10,10,300,22)
this.createTextField("status_txt", this.getNextHighestDepth(), 10, 50, 300,
40);
status_txt.autoSize = true;
status_txt.multiline = true;
status_txt.border = false;
var my_sound:Sound = new Sound();
my_sound.onLoad = function(success:Boolean) {
if (success) {
this.start();
message_txt.text = "Finished loading";
}
};
my_sound.onSoundComplete = function() {
message_txt.text = "Clearing interval";
clearInterval(my_interval);
};
my_sound.loadSound("song2.mp3", true);
var my_interval:Number;
my_interval = setInterval(checkProgress, 100, my_sound);
function checkProgress(the_sound:Sound):Void {
var pct:Number = Math.round(the_sound.getBytesLoaded()/
the_sound.getBytesTotal() 100);
var pos:Number = Math.round(the_sound.position/the_sound.duration 100);
status_txt.text = the_sound.getBytesLoaded()+" of
"+the_sound.getBytesTotal()+" bytes ("+pct+"%)"+newline;
status_txt.text += the_sound.position+" of "+the_sound.duration+"
milliseconds ("+pos+"%)"+newline;
}
See also
getBytesTotal (Sound.getBytesTotal method)
Sound 601