[help] Problems With My Soundcard

Hey guys

I have this damn anoying problem with my sound card. I have an

SiS 7020 Sound card that's build into my mobo. I have the newest

drivers fresh from the manufacturer. I have the sound card hooked

up to my Amplifier which is hooked up to a pair of speakers

(150W each). When I first turn on my comp And my amp is turned

on I get a big Bang sound out of the speakers. This should be

normal cause when you turn the thing on there usually is a small

electrical impulse that comes out the wire. The problem is when I

get into windows my speakers start making this buzzing sound

which vibrates in different tones and/or faster or slower depending

on whether I'm moving my mouse or not. :rant: I've tried everyting

and I can't get rid of this. You have any suggestions ? The only way

I cat not hear it is to turn of the amp or to defean it by turning the

volume up high :rant:

Note to Seph :

Hope this is in the right forum :cry: Oh well, at least I tagged it

#182389

Topic Moved, Post Removed

This is more suited to General Hardware, for one thing.

For another, don't bump threads needlessly - it just annoys people. If someone's going to help you, they'll do it in their own time.

-------------------------

Stevie BM

#182603

I'm sorry :cry: I once heard some mod say that it was ok to

bump a topic if no one had replyed for over 24 Houres :cry:

#182606

[beware of poor translations here]

You'll need to check if your mobo output is configured for

line out or headphones. The latter will push too much energy on the

wire thus you'll be listening to every amplitude change (e.g. caused by the

150 mW peak of your optical mouse).

The "big bang" could kill your amp or speakers one day.

Once this is overcome, you may note a 50-60 Hz hum, you'll need to

get your PC and amp into the same phase, either by trying different power jacks

(in the EU, you could plug off, turn 180° and plug back in) or a potential

dimmer, a set of inexpensive transistors and capacitors that decouple the mobos

background noise by opto coupling. (Line out will always be a variable pitch resistor

and won't put energy on the wire; the amp will do that)

Sometimes, onboard sound is so poorly intergrated that it'll always suffer;

In that case you should buy a sound card that isn't too cheap either.

A HIFI amp capable of driving 2 * 150 W speakers will reveal the cheapness more

than any PC speaker set.

#182614

On the back of my mobo I have three plugs. Microphone, Line out, and

HeadPhones. I have a wire going from my boombox to the microphone

plug so I can listen to radio on my PC. Then I have a wire going from

the headphones plug to the Amp. I tried changing it to the line out but

it does the same thing. Maybe something is badly grounded ? It

buzzes differently depending on whether I move the mouse or press

keys on my keyboard. Also, I don't have an optical mouse so it should

be ok. :cry:

P.S.

I pretty sure it's badly grounded cause when I take the cover of my

PC case touch the metal and the wall I get fizzled

#182622

Disconnect the microphone in, stick to line out and try again.

If the buzzing disappears, do the following:

Inside your PC, there should be a line in header (see your mobos

manual) or aux header in a row where you also might have a CD-in

connected already.

Solder yourself an adapter and connect the line out from your amp

there. Using microphone in for anything that provides its own power can kill

your mobo or at least bake the circuits connected to it. Have a look for

leaking parts, smeared or smoking remnants on your mobo.

Since you are having shortcuts already, I fear you roasted the

chip altogether.

#182681

Oh dear. :cry: The buzzing doesn't go away when I disconnect the line in.

It's something from the comp itself, not coming in through the microphone in.

#182769