As the best video player ever, it should be compatible with the best kernel sound driver ever ... ASIO. Using ASIO, you can bypass all the Windows destructive routing (kmixer, etc) than add more latency and radically drop the quality and directly talk to the sound card. This way, the sound is brighter and look like a studio quality sound.
Today, many sound card come with ASIO driver and for those who don't, there is asio4all.
I think this is a must.