Did you solve your problem with that irritating hiss and ZxR disconnecting?
I have exactly the same problem on my old mobo Gygabyte G33M-S2.
Don't know what to do. New drivers 18.104.22.168 didn't help. Creative Worldwide Customer Response can't help.
The only issue is to completely turn off the AC Power Supply, but this can't solve the problem in general.
Edited by andyvandala - 3/23/14 at 2:49am