This morning I was listening to some MP3s on my computer. A particularly fine tune came on (Holst's Second Suite for Military Band) and I wanted to crank the volume (I was wearing headphones so as not to disturb the cats or make the neighbors think I am any weirder than they already do). So I turned up the volume dial on my Toshiba laptop. Then I turned up the volume in Windows Media Player. Then I turned up the volume in the Windows Control Panel. Just for the sake of completeness, I walked around the house and also turned up other random volume dials (clock radio, stereo in basement, stereo in car) in case I'd missed anything.

Maybe a little change in UI design required?