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 Post subject: High pitch whine from speakers..
PostPosted: Sun Jul 28, 2013 3:18 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
Two nights ago I started getting a loud high pitch whine from my speakers. I haven't changed anything in the PC. I'm using:

Polk Monitor 30
Dayton 10" Sub
Dayton DTA-100A amp
ASUS Xonar DG

I5-2500K
Gigabyte Z68X-UD4-B3
Corsair Vengeance 8GB DDR3 1600
Gigabyte 670 Windforce
Kingstone Hyper X 120GB SSD; 2x WD Black 750GB in RAID 0
HAF 932 Advance
CoolerMaster Silent Pro 700w
25" Asus VE258Q



I routed the cables again and it does not seem to be interference from power cables, etc. I opened the case and I did not see anything unusual. I looked for grounding issues (as best as I could), cut wires, etc. I get the whine from the sound card, onboard sound card and front panel audio jack. If I plug the amp into a different device (mp3 player, etc) there is no whine. I also do not hear any whine while using my headphones in any audio jack on the PC. The issue clearly seems to be with my PC but to me it's odd how the headphones do not do this, only the amp will. I have read it could be the power supply, motherboard, sound card, etc.. How do I figure this out without blindly dumping money into the PC?

Edit: Forgot to mention it is not the Mic. It does it regardless of if the Mic is plugged in or not.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Sun Jul 28, 2013 7:42 am 
Thunderbird
Thunderbird
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Joined: Sun Dec 30, 2007 6:17 pm
Posts: 798
Location: Phoenix, AZ
mudfrogk5 wrote:
.... I get the whine from the sound card, onboard sound card and front panel audio jack. If I plug the amp into a different device (mp3 player, etc) there is no whine. I also do not hear any whine while using my headphones in any audio jack on the PC. The issue clearly seems to be with my PC but to me it's odd how the headphones do not do this, only the amp will. ... It does it regardless of if the Mic is plugged in or not.

What if you plug your headphones into the amp?
If you boost the volume from the amp does the whine increase in volume?
I too am at a loss unless the amp and your PC has some sort of feedback loop.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Sun Jul 28, 2013 8:45 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
Plugging the headphones directly in to the amp causes it as well, as long as the amp is plugged into the PC. With other sources it is fine.

Just to try it and installed a Lepai LP-2020A+ that I had laying around and it does not have any whine. I'll try the Dayton amp on a different PC in a few to see if it does it then.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Sun Jul 28, 2013 9:08 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
Tried the amp on a different PC and it worked fine. No whine at all.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Tue Jul 30, 2013 5:45 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
Ordered a new PSU, hopefully this will fix the problem. I have a CM Silent Pro 700W that is maybe 4-5 years old..


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Tue Jul 30, 2013 7:34 am 
Thunderbird
Thunderbird
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Joined: Sun Dec 30, 2007 6:17 pm
Posts: 798
Location: Phoenix, AZ
Let us know the result. It certain can be a failing PSU causing the line noise and PSUs really should be replaced after 5 years as a general rule because of all the hits they take for the team.

But this is a obviously frustrating issue.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Tue Jul 30, 2013 12:06 pm 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
I have a Cooler Master V700 waiting for me at home.. Gonna throw it in when I get in from work.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Tue Jul 30, 2013 2:40 pm 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
Installed the new PSU and there is no difference. :(

I guess my only option is to start uninstalling all of my components until something makes a difference. What are the chances that it would be the motherboard, even though I'm not using the on board sound?


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Tue Jul 30, 2013 10:18 pm 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5049
If it's just this system, then anything could be making noise, regardless of if you're using it or not.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 4:20 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
I know, unfortunately I'm going to have to try taking everything out a piece at a time until I find it. I'd hate to replace the mobo as it's still decent. Might be under warranty still, I'll have to check. It's a GIGABYTE GA-Z68X-UD4-B3


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 7:35 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
I figured out the issue but I have no idea how to fix it. It is my monitor. I unplugged everything from the PC (power included) and the DVI cable was the last thing plugged in. It was still doing it. I unplugged the DVI and it stopped. I tried HDMI from the monitor and it does the same thing. Since the hum happens when the PC is hooked up to the monitor how do I fix this? I tried separate power strips and outlets. It still did it.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 9:11 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5049
In a silly "didn't care to read the entire thread" assumption, I'm going to assume audio is processed externally. i.e., the DAC is external.

So it could either be that the video cables you have are poorly shielded (doubtful, since good cables should already be shielded), or the monitor has poor shielding. The first one is relatively easy to "fix" - wrap the cable up with aluminum foil. The second you can only confirm if you plug another monitor in.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 9:17 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
I'm not using a DAC. I have an Asus Xonar DG connected to a Dayton DTA-100A via a good 3.5mm to RCA splitter. This is my monitor: http://www.newegg.com/Product/Product.aspx?Item=N82E16824236123


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 9:25 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5049
A DAC is the final stage of any computer audio system. So that means it's internal.

So it's probably the video card then. You could try wrapping foil around the sound card or something. Otherwise there's really nothing you can do.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 9:47 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
I spoke with ASUS and they think the monitor is causing the issue. Going to try a few more things tonight before I RMA it.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 9:52 am 
Smithfield
Smithfield

Joined: Sun Jun 18, 2006 7:37 pm
Posts: 5049
If you have another display, plug it into that and see what happens. If the whining stops then yes, it's the monitor.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Wed Jul 31, 2013 10:11 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
I'm going to try that tonight. I also ordered a toslink to rca converter. Worst case scenario using optical out should hopefully fix the issue.


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 Post subject: Re: High pitch whine from speakers..
PostPosted: Sun Aug 04, 2013 4:46 am 
Little Foot
Little Foot

Joined: Wed Aug 01, 2007 4:02 am
Posts: 120
The Toslink to RCA adapter fixed the issue. I know it's kind of a band aid but it saves me from having to send my monitor back.


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