banjosforpeace
Feb 3 2005, 06:41 PM
I have a PC-based recording studio with a very specific problem. I am getting a sort of scratching noise through the speakers when I move the mouse, load software or scroll web pages. It seems like it is coming from the motherboard, but I can't tell for sure. I changed hard drives and sound cards and it still exists. I'm using the on-board video controller, so I haven't yet eliminated it as a suspect. Other people have described having the same problem and it was most noticable for them when they had a laptop plugged into a PA system. They could hear the scratching sound when they moved the mouse. Anyone familiar with this? My gear: AMD 1.3Ghz Athlon XP Pro SP2 On-board S3 Savage video 256MB RAM (I have to get more, I know) 40GB HD Logitech trackball mouse Micro Advantage 52x32x52 CDRW Sound Blaster Audigy External mixing board running Event TR5 powered reference monitors Essentially, this is a HP Pavilion 7935, but I've replaced the original CDRW, HD and power supply. The only original parts left are the motherboard, CPU and floppy dirve (and I never use floppies, anyway). I should probably go ahead and replace the motherboard and get a good video card, but I wanted to see if anyone knew of anything I could do otherwise.
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spacewaste
Feb 3 2005, 07:30 PM
First...Check to make sure there aren't any products within the computers range that could be causing some sort of interference... Second check the fan for possible things stuck inside it.... If that doesn't work try replacing the mother board but first get a second opinion Also...Have you noticed any slowdownage of your computer...Could be a virus making your computer have to use more processes then it should... But it sounds like a CD-ROM problem...Try taking all disks out of the computer and then restarting it?
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banjosforpeace
Feb 5 2005, 05:22 PM
Thanks for the reply, spacewaste. I've moved things around and tried isolating the comupter. The interference does not seem to be from an external source. I blew the dust out of the fan and that didn't change anything, but it needed to be done anyway. I've done all the virus, spyware and adware scanning there possible. My system is really clean. I even did scandisk, defrag and ran Eraser to maximize empty space. I only put CDs in the drive when I'm using them and never leave any in there, so that's not the problem. It may be the motherboard, or at least the on board S3 video controller. I still want opinions, though. If anyone has ever heard a scracthing sound come through their speakers as they moved their mouse and found a way to get rid of it, please let me know! 
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spacewaste
Feb 5 2005, 08:58 PM
Hmm....I've thought this through...and it may be the speakers themselves?...It seem that that or the mother board is the problem...Try plugging in a different set of speakers to test it out?
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banjosforpeace
Feb 5 2005, 09:56 PM
QUOTE (spacewaste @ Feb 5 2005, 04:58 PM) Hmm....I've thought this through...and it may be the speakers themselves?...It seem that that or the mother board is the problem...Try plugging in a different set of speakers to test it out? I've tried different speakers. The speakers I'm using are super-clean Event Tuned Reference studio monitors. They aren't nearly the best monitors out there, but they so good that they make it possible for me to hear the problem. I don't think the noise is bleeding onto any tracks I'm recording because I've listened to my mixes in another studio. It's like the noise is not in the input section of the signal and is only being picked up by the output section.
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qwijibow
Feb 5 2005, 11:15 PM
this is definatly interferance.... make sure the audio wire funning from the pc to the speakers goes nowhere neer the mouse wire, or monitor wire (or monitor), and possably network cable (however network cable interferance should be out of hearing range) The interfereance is only effecting yoyr speakers, so for exampkle burning an audiop cd, the sound will be perfect. if you cannot get enough distance between your audio wire, and sources of interfereance, look into using shielded wire (like coax). not sure f you can buy it, but if you own a soldering iron, its nothing complicated.
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Rudy
Feb 7 2005, 06:35 AM
 You may not be able to remedy your problem in a conventional manner. There is too much interference generated in a computer to really get clean audio from a regular sound card. I periodically reinstall my sound card drivers to get a better sound as the quality deteriorates over a period of time. If you could shield your sound card in a metal housing and get a clean ground also grounding the housing it will do the trick. But here is something you can try that takes the audio from your usb port as digital audio and convert it to analog. They have box for about $150.00 bucks that seem to be popular. http://www.stereo-link.comGood luck!
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qwijibow
Feb 7 2005, 08:18 PM
however it is worth noting that USB sound or a metal em shiled around your sound card will not effect the quality of audio that your computer exports as a file... only what comes through your speakers. for me, the interfereance was completely in the cable to the speakers, not the sound card, however it could be a great home project shilding your sound card. look up Farraday Cage (and ive probably spelled that wrong)
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banjosforpeace
Feb 8 2005, 12:24 AM
QUOTE (Rudy @ Feb 7 2005, 02:35 AM) You may not be able to remedy your problem in a conventional manner. There is too much interference generated in a computer to really get clean audio from a regular sound card. I periodically reinstall my sound card drivers to get a better sound as the quality deteriorates over a period of time. If you could shield your sound card in a metal housing and get a clean ground also grounding the housing it will do the trick. But here is something you can try that takes the audio from your usb port as digital audio and convert it to analog. They have box for about $150.00 bucks that seem to be popular. http://www.stereo-link.comGood luck! Thanks, Rudy. The stereo-link is a good recommendation, but I think if I went with a converter, I'd want it not just for output, but input as well. I'd like to go that far but can't just yet. I've been drooling over the high-end gear that will do the job. Hey, qwijibow! Your idea is full of possibilities. An ideal Faraday Cage would be difficult because of the audio connectors on the card that go to an external box and CD player. A more simple sheilding effort may do the trick, though. I'm not sure how exactly to this this so I'll have to do some research. Any suggestions on materials? You were also right about some of the noise coming from a poorly shielded cable! I identified a culprit as an RCA to RCA running from the Tape Out of my mixer to a Line In on the Audigy. I switched it out with an RCA to 1/8" going directly to the soundcard and eliminated half of the noise! I have higher quality RCA to 1/8" cables on the way to me right now and will switch both the Tape In and Tape Out to new, better cables. If any noise still exists, I'm going to start working on shielding the sound card. Thanks again!
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deivid
Feb 8 2005, 07:07 AM
Generally the scratching noise came from magnetic fields, the magnetic fields inside of computer are the ventilators and transformers (power source, cpu fan, vga fan or tower fan). Try with another power source, generally the noise come from there, don't buy a cheap one, buy something like thermaltake (www.thermaltake.com) or kindly, they are pretty expensive but you get quality, i've one and is great, you can select the fans speeds (for noise) and they also have PFC (Power Factor Correction) you can save some money saving power. Like I said check the fans (cpu, vga, tower) maybe the noise came from there. Greets Deivid
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iGuest
Nov 5 2009, 11:04 PM
Audio noise on laptop
Advice On Eliminating Audio Noise, Please?
I has the same problem. If I try to hear computer audio output through a little amp (Marshall MG15) I can hear every mouse displacement, hard disc turn, and so on. It's related with the power supply cause if I disconnect the computer from the electrical grid (works with internal battery) noise decreases a lot. I'll try to connect the computer in a different socket.
Regards.
-reply by Luis C. Pérez Tato
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iGuest
Oct 29 2009, 07:29 AM
Fixed noise problem
Advice On Eliminating Audio Noise, Please?
Ok so I understand this may be very old topic and a very late answer. I hope this is an answer for some people.
My problem... mouse movement, moving graphic of any sort on screen, as well as hard drive activity; would all make my speakers hiss, whine, buzz, tick, and make al sorts of strange noises. It was as if my speakers were sounding out everything that went on insided my computer. It was quiet but irritating. Strange to say the least.
I had the exact same problem before my current ASUS P6T. Both situations were with onboard sound. On my older ASUS P5B motherboard, the situation was fixed by installing a PCI SoundBlaster X-fi and turning off the onboard sound in the BIOS.
My set up (or things I consider key elements) = running Vista and a Realtek onboard sound. Although I suspect this may be an issue with other set ups too. -- Considering the shear number of posts out there on this topic.
My solution was this: Control Panel > Hardware & Sound > Sound > Manage Audio Devices.
In the Sound Dialog Box under "Playback" tab double click Speakers.
In the Speakers Properties Dialog Box under "Levels" tab > click mute button beside "PC Speaker".
Like magic my problem was fixed. I cannot answer as to why or what exactly this changes. But it was just like turning on the lights in a room. Click and it was fixed. Go figure.
You may also try the mute button beside "Microphone". Enough research around the net and you will find this has also worked for some people.
IMO, the Realtek onboard sound is the issue. Hope this helps...
The Pizza Repair Man
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iGuest
Sep 10 2009, 10:25 PM
i cracked the problem on my laptop
Advice On Eliminating Audio Noise, Please?
I've had this problem for a couple of years now and a guy I know also has had this problem but for even longer and iam delighted to tell you that I've figured it out!!
my laptop was plugged in to a multiplug adaptor (just a standard extension) along with other things like mymonitor and my amp etc., but also my tv. it has been faulty recently and I've had it unplugged for the past 24 hoursto see if would make a difference. during these 24 hours I hadn't noticed that the sound had stopped, untill that is,I plugged the tv back in! it's simply due to one of the other devices. try the laptop direct into the socket or at leaston it's own in the extesion.
hope this works for you too!
pete harbottle
-reply by pete harbottle
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iGuest
Sep 8 2009, 11:35 AM
Although an old thread, people might still be reading this to find solutions to their problems. I've had the exact same problem mentioned above/below. The speakers tell me when I moved my mouse. My line-out is adjacent to the USB port where I connect my mouse. I disconnected the mouse USB and reconnected (to the same port), and voila. Problem solved.
HTH,
mouse.
-reply by mouse
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iGuest
Aug 9 2009, 11:49 PM
Advice On Eliminating Audio Noise, Please?
Advice On Eliminating Audio Noise, Please?
This all started with the statement that the noise dissapears when the power cord is removed from the laptop. How could it be the laptop or anything with the laptop?
It sounds more like a power adapter issue, grounding problems even if the computer is the only thing connected to a surge protector. Has anyone tried using another power supply adapter?
--STEVE
-reply by steve
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