Well, yea, but these aren't the pause problems lead to either distorted noise (24bit output) or at least changing channels (16bit & 24bit as well) :?
Those are simple misconfigurations.
BTW, for optimal quality, the master volume should be set at 6 (to avoid clipping in amplifier/got the same volume, as 89dcb norm should be), and the four first options in the Options should be enabled + the bass redirection at 120Hz set
Voice control and expand stereo are useless on 5.1 systems. BTW, maybe not on all sestems, but Audigy2zs does the stereo expand by itself, so... :)