Hi i got Vista Home premium with Intel dual core, Nvidia 8800 GTX

I have the latest version of Klite Codecs 4.1.7

anyways i can only hear sound through 1 speaker and i don't know if it has to do some thing with the settings in sound in control panel could someone help me pls?

also in speakers in advanced in default format i have 16bit, 44100 hz (cd quality)

it says i can go up to 24bit, 192000 (studio quality) is this good? or no need?