Question about sound

Hi,

this probably will be a very simple question for you. I make interactive presentations in flash where sound (voiceover) is synchronized with animation (i’m using timeline based stream sound). Initially I used to load sound dynamically by creating sound object, but then i run into sync problems and it was a bit difficult to work when developing the project. So then i switched to timeline based stream sound and it works wonderfully. But now I want to give the user the option of controlling the volume of sound. I know that if sound object is used it is quite simple, but i wanted to ask if there is any way to control the volume of timeline based sounds? As far as I understand the answer ir no, but I have hope left that someone has come up with a tricky solution:)

Maybe someone has some suggestions how to sync the dynamic sound using actionscript?