I'm trying to use the slider controls to raise and lower the volume but it doesn't work. I've tried the master volume as well as the individual SPUs but none of them work. Is there a way to make them work?

Also, does this forum have a search function?

A Slider control doesn't generate an event when moved. Moving the slider changes its value between the minimum and the maximum as defined in its properties. Changing its value will move the slider.