AC'97 "background noises"

Panteratorr · 06-11-2005, 11:47 AM

I can hear strange noises in the background all the time. I'm sure it's not because of speakers. I can hear it also in headphones. It's a soundcard problem. It sounds like I can "hear CPU" through my speakers. Noises are similar to 56k modem noise. It's some kind of whirr. It's stronger and louder when CPU is busy. I think it's some signal which comes to soundcard from another hardware. But I don't know how to fix it.

I'm using:

AC'97 onboard soundcard

VIA 4 in 1 v4.43 driver
Vinyl audio codec v6.00a
VIA P4X333 Chipset
ECS P4VXASD2+ motherboard
Intel Celeron 1.8 GHz
MSI GeForce FX 5600 XT
512 MB RAM
Windows XP Home SP2

Can anybody help, please? What's the problem???? I'll appreciate any idea.

Thank you!

ebackhus · 06-11-2005, 02:40 PM

Sounds to me like electrical noise in the system. This can be caused by noise in your household electric supply or by excessive magnetic intereference in your computer. Are you on a surge strip?

**koala** · 06-11-2005, 04:24 PM

I had the same problem when I had the audio lead from my TV card plugged into the soundcard's line-in. Try muting everything in the volume controls, then turn them back on one at a time until you find where the sound is coming from.

**blackduck30** · 06-12-2005, 03:46 AM

there is a chance that you are getting interference from power sources from within your computer. I have heard of people using ferrite chokes to help eliminate the problem. Although I don't know a lot about there use and in how many you need to use and such I do know that these oversized lifesaver looking things are used to run your power leads and stuff through and help eliminate crossover interference, a quick google may help with some more info or there is a good chance someone in the forum will be able to give some more detailed info

Panteratorr · 06-13-2005, 02:51 AM

Finally, I've resolved this problem. It's very simple. Thank you Koala for your advice!!! The problem was that I've forgot turn on the advanced mode of volume control. And then the only thing I needed to do is to MUTE PC SPEAKER. The whirr has gone!

Thanks a lot!

06-11-2005, 11:47 AM	#1 (permalink)
Panteratorr Registered User Join Date: May 2005 Location: Slovakia Posts: 31 OS: WinXP Home SP2 My System	AC'97 "background noises" I can hear strange noises in the background all the time. I'm sure it's not because of speakers. I can hear it also in headphones. It's a soundcard problem. It sounds like I can "hear CPU" through my speakers. Noises are similar to 56k modem noise. It's some kind of whirr. It's stronger and louder when CPU is busy. I think it's some signal which comes to soundcard from another hardware. But I don't know how to fix it. I'm using: AC'97 onboard soundcard VIA 4 in 1 v4.43 driver Vinyl audio codec v6.00a VIA P4X333 Chipset ECS P4VXASD2+ motherboard Intel Celeron 1.8 GHz MSI GeForce FX 5600 XT 512 MB RAM Windows XP Home SP2 Can anybody help, please? What's the problem???? I'll appreciate any idea. Thank you!

06-11-2005, 02:40 PM	#2 (permalink)
ebackhus Manager, Design Join Date: Apr 2005 Location: SATX Posts: 14,262 OS: WinXP Pro SP3/Windows 7 RTM My System Blog Entries: 28	Sounds to me like electrical noise in the system. This can be caused by noise in your household electric supply or by excessive magnetic intereference in your computer. Are you on a surge strip? __________________ ----------------------------- There are no dumb questions, unless a customer is asking them. Help in the fight against cancer and other serious illnesses.

06-11-2005, 04:24 PM	#3 (permalink)
koala Moderator Hardware Team Join Date: Mar 2005 Location: UK Posts: 12,344 OS: XP/7/Ubuntu My System	I had the same problem when I had the audio lead from my TV card plugged into the soundcard's line-in. Try muting everything in the volume controls, then turn them back on one at a time until you find where the sound is coming from. __________________ New members: Subscribe to your thread (Thread Tools) to receive an instant email notification when you get a reply. TSF Folding@Home Team 85015 - details here

06-12-2005, 03:46 AM	#4 (permalink)
blackduck30 TSF Enthusiast Join Date: Sep 2004 Location: Wollongong/Australia Posts: 4,230 OS: XP pro SP3/Vista Ultimate My System	there is a chance that you are getting interference from power sources from within your computer. I have heard of people using ferrite chokes to help eliminate the problem. Although I don't know a lot about there use and in how many you need to use and such I do know that these oversized lifesaver looking things are used to run your power leads and stuff through and help eliminate crossover interference, a quick google may help with some more info or there is a good chance someone in the forum will be able to give some more detailed info __________________ Blackduck30 Time is like money and milk, It's always running out Any Donations Help Keep TSF Free For All

06-13-2005, 02:51 AM	#5 (permalink)
Panteratorr Registered User Join Date: May 2005 Location: Slovakia Posts: 31 OS: WinXP Home SP2 My System	Finally, I've resolved this problem. It's very simple. Thank you Koala for your advice!!! The problem was that I've forgot turn on the advanced mode of volume control. And then the only thing I needed to do is to MUTE PC SPEAKER. The whirr has gone! Thanks a lot!