After much testing, the crackling, popping and intermittent sound drops that I am experiencing are being caused by BOTH my Intel 82567 Gigabit Network Connection and Intel Centrino N 6200 wireless card (although the former causes way more problems).
I have downloaded the latest drivers
for both and for my sound card and, have updated the BIOS...but no change. My latency is off the charts; lots of red bars in DPC checker. the problem seems to be getting worse with time.
What to do?
I am using Windows 7 64 bit on a Dell Latitude E6400.