Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) Mainboard is: http://www.asus.com/Motherboards/MAXIMUS_IV_GENEZ/

Only fix at the moment is changing "load-module module-udev-detect use_ucm=0" in "/etc/pulse/default.pa " to "load-module module-udev-detect tsched=0". With Kernel 3.13.2 and Ubuntu 13.10 sound without "load-module module-udev-detect tsched=0" is better but sometimes there is still some crackling noise. Hope you can fix this. Best regards