The problem is I get the noise only under dos box, I get an amazing sound under windows and in all actual games.
My sound volume is at about 25% in the sound mixer (not even close to 80%), and I need to rise it only for DVDs at about 40%. Everything is working great except dos box. I can rise CPU cycles or rise frameskip it doesn't change a thing.
I have the last version of everything.
I'm using high qualitiy sennheizer headphones directly pluged in my sound card, and again I'm having no problems with them, except dos box.
That's why this noise seems so strange to me, and I can't think of a solution for it.