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Whine through speakers when computer under load?

post #1 of 4
Thread Starter 
A few weeks ago I made a thread about a hum/buzz coming out of my monitors and a lot of you mentioned ground loop which when I investigated it and changed my computers plug socket eliminated MOST of the static.

I say most because there was still a faint noise but it wasn't that bad and couldn't be heard when anything else was playing, now when playing Rome II I get this buzz through my speakers which directly mimics the coil whine from my card.
My GPU has always had really bad coil whine and when under load it can et really bad but it seems the hum through my speakers seems to mimic that, when I get into a really intensive battle for example and my cards whine gets worse so does the buzz from the speakers, when I zoom into the ocean or ALT-TAB out of the game to remove load from the card the buzz goes away.

My setup is as follows

Onboard optical TOS link > Audio Engine D1 USB DAC > ROKIT 6 via RCA

would using a USB adaptor to pass the optical signal to the DAC instead of using onboard help? i'm quite stuck here and it really is quite annoying, the only reason I'm using an optical link is to help remove the ground loop mad.gif

As usual any help appreciated, thanks guys biggrin.gif

EDIT: The same thing happens over USB to the DAC and whats weird is even if I turn the DAC volume all the way down the buzz is still there, ALT-TAB ing out of the game stops the buzz. :s
Edited by Rian - 9/4/13 at 10:07am
   
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post #2 of 4
Look for a better shielded USB cable with a ferrite choke on it. You can also try twisting the speaker cables together (make a twisted pair). Where are you powering the DAC from? You won't eliminate the problem if it's still plugged into the PC. Grab your cell phone charger and power it from a different line & see if that works.
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post #3 of 4
Quote:
Originally Posted by Dirtyworks View Post

Look for a better shielded USB cable with a ferrite choke on it. You can also try twisting the speaker cables together (make a twisted pair). Where are you powering the DAC from? You won't eliminate the problem if it's still plugged into the PC. Grab your cell phone charger and power it from a different line & see if that works.

I agree with this, try a an external usb port and then a different outlet.
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post #4 of 4
Thread Starter 
Quote:
Originally Posted by Dirtyworks View Post

Look for a better shielded USB cable with a ferrite choke on it. You can also try twisting the speaker cables together (make a twisted pair). Where are you powering the DAC from? You won't eliminate the problem if it's still plugged into the PC. Grab your cell phone charger and power it from a different line & see if that works.

Quote:
Originally Posted by DrGroove View Post

I agree with this, try a an external usb port and then a different outlet.

Thanks for your replies, the DAC is running from a powered hub, I'm going to run the DAC from a separate power source now and see what happens thanks thumb.gif
   
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