You might have read this one, then again maybe not!
(I searched and didn't find any relevant results... )
Its a very concise article that gives you a short guide on how to improve the quality of sound on your PC, mainly for music.
This is a highly simplified diagram of how the music flows:mp3 file --> mp3 decoder --> processor --> soundcard --> speakers --> Ears
Each one of these stages has to be optimized if you want the best quality sound. If the mp3 file is low-bit rate to begin with, no amount of tweaking can make it sound lush and full. Or if you are using tin boxes for speakers, even a SACD would sound crappy on them. One weak link in the chain and there goes your listening experience.
Have a look
Aqua-Soft Forums