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Old 01-26-2014, 12:15 PM   #35
tspring
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Join Date: Jan 2007
Location: Eastern shore of Maryland, USA
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Quote:
Originally Posted by planetnine View Post
Put a pair of DI boxes on the output (or other signal isolating device -usually containing isolating transformers)..
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Actually, in the case described in my previous post, DI boxes did not solve the noise problem at all. Indeed, the noise was still present when the internal sound card on the PC was used and there was no separate path to ground from the sound card. The Ebtech Hum X Voltage Hum Filter on the ground line for the PSU did the trick.

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