Logiterch X540 issue

[rhitwick]

Guys I'm having this strange issue with my X-540.

Till 1-2 months ago it was working fine, now it provides 2.1 output very well, good bass and balanced treble but when it comes 5.1 media the sound just cracks...

I'm sound addict and high quality sound is my first priority...please help me.
What can be the reason?

Config:
Q6600
Abit IX38Quad GT

Back panel config for 5.1 output is done properly.
If u want u can post again how I should put the cords.

Player using KMplayer (Preset: Full bass and treble, Crystality and normalizer on)

[Faun]

Have you tried it in normal preset ?