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#1
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Soundcard noise?
Is there any way fix the static noise that comes out of the speakers
even when the computer is off and doing nothing? I believe that this noise is as a result of having the sound card hardware directly on the motherboard, subject to all of the electrical noise of the motherboard. Are there any suggestions for alternatives to the embedded soundcard? I don't think even a PCI soundcard is immune from the electrical noise. Yousuf Khan |
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#2
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Soundcard noise?
On 4/8/2017 9:26 AM, Yousuf Khan wrote:
Is there any way fix the static noise that comes out of the speakers even when the computer is off and doing nothing? I believe that this noise is as a result of having the sound card hardware directly on the motherboard, subject to all of the electrical noise of the motherboard. Are there any suggestions for alternatives to the embedded soundcard? I don't think even a PCI soundcard is immune from the electrical noise. Yousuf Khan That's a bit vague to provide any clear answers, so I'll just say that none of my systems have such problems, whether they're basic "consumer-grade" or pro-level audio workstations with over 50 inputs, both analog and digital. -- best regards, Neil |
#3
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Soundcard noise?
On 8/04/2017 9:26 PM, Yousuf Khan wrote:
Is there any way fix the static noise that comes out of the speakers even when the computer is off and doing nothing? I believe that this noise is as a result of having the sound card hardware directly on the motherboard, subject to all of the electrical noise of the motherboard. You talking about the front panel audio or the audio outputs at the back? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
#4
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Soundcard noise?
Yousuf Khan wrote:
Is there any way fix the static noise that comes out of the speakers even when the computer is off and doing nothing? I believe that this noise is as a result of having the sound card hardware directly on the motherboard, subject to all of the electrical noise of the motherboard. Are there any suggestions for alternatives to the embedded soundcard? I don't think even a PCI soundcard is immune from the electrical noise. Yousuf Khan And you checked, that with the inputs on the amplified computer speakers grounded, there is no junction noise to speak of in the amplifier itself ? I'm just going by your description of a static noise. Paul |
#5
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Soundcard noise?
Yousuf Khan wrote:
Is there any way fix the static noise that comes out of the speakers even when the computer is off and doing nothing? I believe that this noise is as a result of having the sound card hardware directly on the motherboard, subject to all of the electrical noise of the motherboard. Are there any suggestions for alternatives to the embedded soundcard? I don't think even a PCI soundcard is immune from the electrical noise. Yousuf Khan That's really odd. I have never had any speaker noise on any comp. The choke coils on the MB sometimes whine when stressed but that does not get into the sound system. My guess your noise is due to a wiring problem. |
#6
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Soundcard noise?
On 4/8/2017 9:59 AM, Wolf K wrote:
When the computer is off, there will be no noise. I think you mean when it's hibernating or on standby. In which case IMO your machine is defective. Induced currents when the machine is turned off are possible, but I think that would require rather strong electromagnetic fields near you. Happens even when the computer is completely shutdown. But even in a shutdown situation, I think some power flows through the system, at least for such operations as Wake-on-LAN or things like that. Now that would be interesting to test out. What if I do a complete power-off using the mechanical switch at the back of the PSU. Anyways, it's irrelevant, still need a solution to the noise problem in standard usage. Yousuf Khan |
#7
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Soundcard noise?
On 4/8/2017 10:50 AM, KenW wrote:
The power supply for the speakers may be defective. Also leaving the power to the speakers always on may be too much for the power supply. This assumes that you are using external powered speakers since the computer is OFF. Usually the audio from the computer is not powerful enough to power speakers directly. Yeah, the vast majority of speakers are powered these days. |
#8
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Soundcard noise?
On 4/8/2017 11:17 AM, Mr. Man-wai Chang wrote:
You talking about the front panel audio or the audio outputs at the back? The back. |
#9
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Soundcard noise?
On 4/8/2017 11:29 AM, Paul wrote:
And you checked, that with the inputs on the amplified computer speakers grounded, there is no junction noise to speak of in the amplifier itself ? I'm just going by your description of a static noise. Paul Well, I'm not sure if the speakers have grounded plugs, too many other plugs around there to go check right now. Yousuf Khan |
#10
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Soundcard noise?
On 4/10/2017 8:28 AM, Yousuf Khan wrote:
On 4/8/2017 9:59 AM, Wolf K wrote: When the computer is off, there will be no noise. I think you mean when it's hibernating or on standby. In which case IMO your machine is defective. Induced currents when the machine is turned off are possible, but I think that would require rather strong electromagnetic fields near you. Happens even when the computer is completely shutdown. But even in a shutdown situation, I think some power flows through the system, at least for such operations as Wake-on-LAN or things like that. Now that would be interesting to test out. What if I do a complete power-off using the mechanical switch at the back of the PSU. Anyways, it's irrelevant, still need a solution to the noise problem in standard usage. It's not irrelevant, because if you still get static noise from your speakers when the computer is completely powered down, you can eliminate it as a source of your problem. So, it's an easy test to determine where to look next. -- best regards, Neil |
#11
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Soundcard noise?
On 4/10/2017 9:11 AM, Neil wrote:
It's not irrelevant, because if you still get static noise from your speakers when the computer is completely powered down, you can eliminate it as a source of your problem. So, it's an easy test to determine where to look next. Yeah, you're right, I did turn it off from the back, and the noise remained. So the question now becomes, how do I fix these speakers? |
#12
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Soundcard noise?
On 10/04/2017 8:30 PM, Yousuf Khan wrote:
On 4/8/2017 11:17 AM, Mr. Man-wai Chang wrote: You talking about the front panel audio or the audio outputs at the back? The back. I heard a say that some front panels had its audio's ground pin shared with USB ports' ground, causing this noise. Not sure whether it applies to your case. -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
#13
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Soundcard noise?
In article , bbbl67
@spammenot.yahoo.com says... Happens even when the computer is completely shutdown. Do you get this noise if you plug a pair of headphones into the audio outlet? If you don't and you are using external powered speakers then the fault is with them. |
#14
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Soundcard noise?
On 4/10/2017 9:58 AM, Yousuf Khan wrote:
On 4/10/2017 9:11 AM, Neil wrote: It's not irrelevant, because if you still get static noise from your speakers when the computer is completely powered down, you can eliminate it as a source of your problem. So, it's an easy test to determine where to look next. Yeah, you're right, I did turn it off from the back, and the noise remained. So the question now becomes, how do I fix these speakers? The next thing I'd check is the wire feeding the audio to the speakers. If it is permanently attached to the speakers, then short-circuit it by connecting a wire to all the rings on the jack (I'm trying not to be too technical on purpose, but if you need more details, do a search on "ring tip sleeve jacks"). If that quieta the speakers down, it implies a few things. If the wire is detachable, replace it. If not, you may be SOL. -- best regards, Neil |
#15
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Soundcard noise?
Yousuf Khan wrote:
On 4/8/2017 11:29 AM, Paul wrote: And you checked, that with the inputs on the amplified computer speakers grounded, there is no junction noise to speak of in the amplifier itself ? I'm just going by your description of a static noise. Paul Well, I'm not sure if the speakers have grounded plugs, too many other plugs around there to go check right now. Yousuf Khan It's best for a computer amplified speaker, if it uses a two-prong plug and not a three-prong plug (in North America). The amplified speakers should not have an absolute ground reference. They should "float". When you connect the 1/8" LineOut from the computer to the speakers, that ground conductor on the cable, establishes ground. Such an architecture, is intended to prevent ground loops which cause hum. You'll notice that a lot of computer speakers (with the exception of their cheap power supply designs inside), are really quite good on hum. I'm not referring to that. I'm referring to "how do the speakers perform with a zero volt signal on input". If you remember the days of eight track, some of the power amps back then, used to "hiss like crazy". And those were semiconductor junctions, and their noise spectrum. Such noises never really go away, but you will find some modern designs that are pretty quiet when receiving zero volt input. On my amplifier where I have a schematic, I know that turning the knob down to zero, gives a quiet zero volt input. Because it shorts the two input terminals together on that channel. Each channel of the amp has its own volume control (so you can define balance too). https://s14.postimg.org/9s4yol6j5/na...d_speakers.gif Disconnecting the cable, is to ensure there is no path for hum. Then, turning the volume knob down to zero, gives a chance to listen for amplifier noise. YMMV. Paul |
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