Is your computer's built-in soundcard in the loop at all?
I wonder why this kind of reaction comes up many times.
So may i ask why? Can this be said as 'standard'? What if it is a Hy Def sound card?
Why i ask? I'm not afraid to use my Hy Def sound card and hardly to not have noise (accept for some minor analogue white nois). So IMO this ain't a standard problem.
And this is not the first PC with HD sound card that i had.