Overclock.net › Forums › Components › Sound Cards and Computer Audio › Front panel audio interference
New Posts  All Forums:Forum Nav:

Front panel audio interference

post #1 of 2
Thread Starter 
This is a problem that has always plagued me & my builds... Half a dozen + of each component in various configurations... I always have interference / background noise through the front panel audio header. It generally goes hand in hand with graphics & power supply loading (HDD access, graphics intensive tasks, etc). This signals a grounding issue, which I have confirmed by plugging in a separate front panel unit from another case (just plugged in the audio component to my mobo) - which sounds fine, until I ground that unit to the case (touch outer part of USB port to case).

Moving the power & audio cables around helps slightly, which points to poor shielding of the audio wires, but shielding them does not fully eliminate the noise. I would suspect PSU grounding problems, but all PSU's I've had have done this (Antec 500w Basiq, Antec NEO 500W, OCZ MXP 600 & 700, Seasonic S12 430W, Seasonic X 660W), and all in various cases, plugged into various mobo's throughout my builds, which makes that unlikely the source of the problem.

Rear mobo audio is always fine, and I've verified this noise with several different headphones.

I would be tempted to just separate my audio ground from the chassis & USB ports, but the headphone & mic ports are between USB ports, which leads me to think they're on a common PCB... which makes me hesitant to cut/break the plastic shroud off from around the ports for fear they won't be isolate-able...

Does anyone actually have clean front panel audio? Or is this just a problem I'll have to live with? I'd love to fix this...
Smalls
(9 items)
 
HTPC
(15 items)
 
 
CPUMotherboardGraphicsRAM
Intel i5 3570 Asus P8Z77I-Deluxe EVGA GTX 660 Ti SC Corsair Vengeance LP DDR3 8GB 
Hard DriveCoolingOSPower
OCZ Vertex 3 120GB Scythe Big Shuriken 2 Windows 7 Home 64 Bit Silverstone SST-ST45SF 
Case
Silverstone SG05-450 
CPUMotherboardGraphicsRAM
Phenom II X2 560 MSI 785GM-P45 MSI HD6570 1GB DDR3 Microcenter/A-Data DDR3 4GB 1333 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility 2 Western Digital Caviar Green 2TB Samsung Bluray Scythe Big Shuriken 
OSMonitorPowerCase
Windows 7 Home 32 Bit Vizio 26" LED/LCD TV Antec Earthwatts 380 w/modded fan SilverStone Milo ML03B 
Other
Hauppauge 2250 Tuner 
  hide details  
Reply
Smalls
(9 items)
 
HTPC
(15 items)
 
 
CPUMotherboardGraphicsRAM
Intel i5 3570 Asus P8Z77I-Deluxe EVGA GTX 660 Ti SC Corsair Vengeance LP DDR3 8GB 
Hard DriveCoolingOSPower
OCZ Vertex 3 120GB Scythe Big Shuriken 2 Windows 7 Home 64 Bit Silverstone SST-ST45SF 
Case
Silverstone SG05-450 
CPUMotherboardGraphicsRAM
Phenom II X2 560 MSI 785GM-P45 MSI HD6570 1GB DDR3 Microcenter/A-Data DDR3 4GB 1333 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility 2 Western Digital Caviar Green 2TB Samsung Bluray Scythe Big Shuriken 
OSMonitorPowerCase
Windows 7 Home 32 Bit Vizio 26" LED/LCD TV Antec Earthwatts 380 w/modded fan SilverStone Milo ML03B 
Other
Hauppauge 2250 Tuner 
  hide details  
Reply
post #2 of 2
Thread Starter 
Picked up a sound card today (ASUS Xonar DSX) - which made no difference. I'm thinking my best results would come from dissociating the audio ground from the chassis... Maybe time to man up and whip it out (the Dremel, that is)...
Smalls
(9 items)
 
HTPC
(15 items)
 
 
CPUMotherboardGraphicsRAM
Intel i5 3570 Asus P8Z77I-Deluxe EVGA GTX 660 Ti SC Corsair Vengeance LP DDR3 8GB 
Hard DriveCoolingOSPower
OCZ Vertex 3 120GB Scythe Big Shuriken 2 Windows 7 Home 64 Bit Silverstone SST-ST45SF 
Case
Silverstone SG05-450 
CPUMotherboardGraphicsRAM
Phenom II X2 560 MSI 785GM-P45 MSI HD6570 1GB DDR3 Microcenter/A-Data DDR3 4GB 1333 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility 2 Western Digital Caviar Green 2TB Samsung Bluray Scythe Big Shuriken 
OSMonitorPowerCase
Windows 7 Home 32 Bit Vizio 26" LED/LCD TV Antec Earthwatts 380 w/modded fan SilverStone Milo ML03B 
Other
Hauppauge 2250 Tuner 
  hide details  
Reply
Smalls
(9 items)
 
HTPC
(15 items)
 
 
CPUMotherboardGraphicsRAM
Intel i5 3570 Asus P8Z77I-Deluxe EVGA GTX 660 Ti SC Corsair Vengeance LP DDR3 8GB 
Hard DriveCoolingOSPower
OCZ Vertex 3 120GB Scythe Big Shuriken 2 Windows 7 Home 64 Bit Silverstone SST-ST45SF 
Case
Silverstone SG05-450 
CPUMotherboardGraphicsRAM
Phenom II X2 560 MSI 785GM-P45 MSI HD6570 1GB DDR3 Microcenter/A-Data DDR3 4GB 1333 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility 2 Western Digital Caviar Green 2TB Samsung Bluray Scythe Big Shuriken 
OSMonitorPowerCase
Windows 7 Home 32 Bit Vizio 26" LED/LCD TV Antec Earthwatts 380 w/modded fan SilverStone Milo ML03B 
Other
Hauppauge 2250 Tuner 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Sound Cards and Computer Audio
Overclock.net › Forums › Components › Sound Cards and Computer Audio › Front panel audio interference