Set the starting volume of volume_user slider

Hi,

Thanks Kirupa, for this useful utility (http://www.kirupa.com/developer/mx/volume_slider.htm). I succeeded to make it work, but my sound library has sounds with too high volume, so I want to set the starting volume lower than actual. How could I do that? Of course I could recreate all my sounds, but I have about 1500 of them…

Thanks for your help

Phil