Help with the volume

Hi!
I am trying to work something out with the info at:
http://www.kirupa.com/developer/mx/volume_slider.htm

My question is, how can I make that the sound doesn’t start with 0. I want it to start with a bit higher volume instead of one having to change the volume from start. Where can this be changed?

Please help me out on this one!

Best regards
JoakimN