I see the same things. I've seen in WMP 10 and 11. Most other programs such as RealPlayer and WinAmp have better volume and better sound quality. WMP player needs to be turned up to the max at which point it. Personally, I prefer to listen to most music and videos in something other than WMP..

One note, make sure to check the equalizer in WMP to confirm that all frequencies aren't set to the flat setting.. Tinkering with the equalizer will help sound quality and can increase volume but it won't normalize the volume with the other tools you've mentioned..

Hope this helps.

Grif