When i use that option, music is increased in volume which is good, since otherwise music on my laptop does not sound loud or how i want it to sound even with all controls on max. However so far i have spotted on application where this has reverse effect - Winamp. While everywhere else music sounds loud, it sounds less loud in Winamp.
To better know what i am talking about, here is the video.
So i have to constantly enable disable option depending what i am listening/watching to.
FYI: I have IDT Audio Control Panel.