Bill,
A basic grounding problem in a lot of cases in a loop in the grounding
system. Be sure that all items are grounded to the same ground and not just
to each other in a random method. This may help.
Bill Rising
<brising at Louisville.edu> To:
"MacUser Group"
Sent by: <macgroup at
erdos.math.louisville.edu>
owner-macgroup at erdos.math.lou cc: (bcc:
Thomas J. Guenthner/ADMIN/LOU/HUD)
isville.edu Subject: MacGroup:
white noise over iMic
05/09/2004 10:54 PM
Please respond to macgroup
Hey all you iMic users,
OK, I fiddled around with the Turntable to iMic to USB hub recording
method, again, and it seems that the problem may not be a grounding
problem.
If I take the input from the turntable out of the iMic, I get the 60Hz
buzz, unless I (effectively) ground the iMic by holding it in my hand.
When the grounded by hand I get white noise (noise across the whole
spectrum).
If I plug in the input from the turntable, I get the same white noise as
I do w/o the turntable.
What am I supposed to do to not get this humongous amount of noise?
I tried grounding the ground wire from the turntable to other grounds,
i.e. to the ground in the outlet strip to which the USB hub is connected,
to the case of the power supply of the computer, to the ground screw on a
non-turntable-friendly stereo plugged into the same powerstrip as the USB
hub, and to the antenna ground on the same stereo.
Somehow I have an idea that there is some basic concept I am missing.
Bill
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