Do this, in WMP, run a wav file over and over (using WMP- set to repeat). On my system, the sound file playback quality will degrade. I also have problems with my quad-speaker system. Read speakers won't work, it only runs at 2 speaker mode. ARGH! Yes it's a problem, and soyo isn't helping, but aside from that this has been a stable board. Not one BSOD (except a few when hard drives overheated).
This problem isn't with soyo, its with the company that they went with for the onboard sound. Cheap-o. It's really good sound, but too many bugs.