I'm using the 7.1 on board audio. I notice on all 3 pairs of my headphones that I get a low buzzing noise that is always present, even if i completely mute all sound from the control panel. It also stays at the same pitch no matter how high or low the actual volume is (obvious since muting doesn't help). The noise seems to get more active as I go through programs or click around the internet and such. I also just noticed that after I walked away from the computer for 10 or so minutes and came back it wasn't there, as soon as I played a track it came back immediatley. Might be something to do with the z5500.
I currently have logitech Z-5500 surround hooked to the on-board through the orange/green/black cables.
Here's the build, I've used high end parts for everything so it's not that.
Processor (Intel® Core™ i5 750 Processor (4x 2.66GHz/8MB L3 Cache))
Processor Cooling (CoolerMaster Hyper 212 Plus)
Memory (CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600)
Video Card (NVIDIA EVGA GeForce GTS 250 1GB)
Motherboard ([SLI] ASUS P7P55D-E PRO w/ 10-ch HD Audio, USB 3.0, S-ATA 3.0)
Power Supply (750 Watt Corsair CMPSU-750TX)
Primary Hard Drive (WD Caviar Black 1 TB HARD DRIVE 64M Cache, 7200 RPM, 6.0Gb/s)
Optical Drive (24X Dual Format/Double Layer DVD±R/±RW + CD-R/RW Drive Lightscribe Technology)
12-In-1 Internal Flash Media Card Reader/Writer
Meter Display (NZXT Sentry 2 Touch Screen Fan Controller & Temperature Display)
Edited by 00birdy - 9/9/12 at 5:26pm