The moment I play music there is crackling/popping sound in the background . I've been facing this issue for quite a while (when I upgraded to windows 7 from windows xp last month ). I tried fidgeting with all my settings, checked all the drivers, got my motherboard checked but everything seemed to be normal. However I noticed if i do not switch on my Adsl modem or if i disable network adapters (i've Realtek PCIe FE Family Controller) the crackling sound is almost gone. But then i cannot use internet and listen to music at the same time. How do I sort out this problem. ? Any help would be really appreciated.