I just switched xp for w7 and got the old sound crackling back.
I had that sound problem on xp for a while, too, but I got it halfway fixed so that the sound only stutters in the demigod selection screen (where you can pick the DG you want to play).
But now that I got W7 installed, the sound bug is back in all it's glory. I checked it with creative audigy 2 and the onboard realtek sound - both the same (and no: I don't have both active at the same time).
I get less crackling when setting sound to low and reverb to off ... but occasionally i get that noise again.
Is there any solution short of buying a new sound card?