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Speakers making this humming/whining noise. Need help in fixing it :(

post #1 of 13
Thread Starter 
Hey guys, I don't know why, but my speakers are now making this high pitched whining noise. It seems to have happened after I opened my computer, but I'm not sure.....

Basically I have two book shelf speakers connected to a Dayton 100a amp, which is then connected to a sound card in my computer.


The gain only has to go up a quarter to half before I start hearing it. Also when I move my mouse, it makes this weird noise.....

Anything I can do to fix/troubleshoot this? Thanks.



edit: So if I have my headphones directly plugged into the soundcard I don't hear anything. But when my amp connects, that is when I get the noise.

Also using my phone or my girlfriend's laptop as a source produces no sound, so something with my computer then.....

I also plugged it into the front panel, makes the noise when connected to the sound card, doesn't when its not. Also connected it into a disabled onboard sound port just to see if it makes any sound, and it doesn't really.
Edited by Lettuceman - 3/24/13 at 3:40pm
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post #2 of 13
Could be a grounding or EMI issue. Is the sound card close to a video card? You could try changing slots regardless.
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post #3 of 13
Thread Starter 
Yea the sound card is close to the video card, but I can't really change anything because I have a pci sound card, graphics card takes up the other one.

Also, why would it just start now?


edit: Also tried it with onboard sound, same exact thing.
Edited by Lettuceman - 3/24/13 at 5:10pm
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post #4 of 13
Thread Starter 
Hey guys quick question. If it is the graphics card causing some massive emi, how do I test it?

Do I just take it out? If so how do I test the speakers then?
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post #5 of 13
Well you said you tried it with onboard audio, so the video card probably isn't the issue.
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post #6 of 13
Thread Starter 
Quote:
Originally Posted by DrGroove View Post

Well you said you tried it with onboard audio, so the video card probably isn't the issue.
Couldn't a video card producing a lot of EMI affect onboard audio too?
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post #7 of 13
I guess it's possible. Take the card out and enable onboard video so you can boot and test it out.
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post #8 of 13
Your problem could be for many reasons, in which I have had the same problem with a old xonar DX. I moved onto a more expensive external DAC.

Here is a few things you can try.

1. Disable on-board sounds.
2. Check the voltages on your psu. A old power supply can start producing a capacitor hiss, and old mother boards as well.
3. Hook amp directly to a ipod or another source, this is to confirm its your pc making the noises.

If your headphones does not make the sound and only the amp does its most defiantly a group loop. This is why I enjoy a lifted optical external sound card as there is never an issue.

Keep me informed.
post #9 of 13
Thread Starter 
On board sound has always been disabled.
Yea I already found out that the speakers/amp make no noise while using another source.

My psu is only a year old, it's the seasonic in my sig.

Ground loop you say? How would one test or fix for such a thing. I'm new to the concept, time to go do some research.
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White Giant
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post #10 of 13
You can buy a cheap device to isolate the connection, local stores should carry one. Its is only a small investment. My same issue was still happening with my external DAC, and usb, or RCA connection. Thus the move to optical. I suspect mine was something in the motherboard.

They run from 10$-40$ I believe.
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