"- When using the debug version of DirectSound, DirectSound buffers are
initialized with a static-like noise. This allows an application running
debug DirectSound to determine if it is attempting to play a buffer that has
not had valid audio data written to it. If you hear a burst of noise when
you play a DirectSound buffer, this is the most likely cause."

That might be the problem you have, since I, when using the retail version instead of the debug version, don't experience any problems like that.