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Speaker Noise

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Stingray:
I got my cab in a semi working state last night. This was the first chance that I've had to see how my speakers work. They're picking up some kind of interference, it seems to be happening when the hard drive is seeking. When you hear the HD doing it's thing, I'm getting a high pitched whining/ beeping sound through the speakers.  



I desoldered the volume knob off the board and have relocated it to a metal plate which will be mounted in the top of the cab so I can adjust the volume as needed. I strongly suspect that the wires running between the volume knob and the board are what is picking up this interference. Is there some way they could be shielded or am I totally barking up the wrong tree?

-S

Brad Lee:
Simple thing to check would be in the volume properties, make sure that line-in, mic etc are muted, everything except your main volume and whatever it calls wav out

My mobo had a nasty humm that this was the culprit, except it increased on mouse movements instead of disk access like you mention

Ken Layton:
It's never a good idea to have audio lines hear the fluorescent light fixture. The ballast radiates hum.

At the very least your wire should be two conductor, foil shield, with drain wire. Then the volume control should be enclosed in a metal box if you run near the light fixture.

Stingray:
Ken, that's good to know, but at the moment, the light fixture isn't wired in at all.

Brad, this is a Mac, not Windows. I'll check the sound control panel to see if there's something similar.

Thanks

-S

CM:
In amplified speakers, try turning the line level from the PC down very low and then raise the volume on the speakers themselves.  This will help reduce noise picked up from hd/mobo/etc.

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