In Reply to: What measurements? posted by fmak on November 18, 2015 at 23:55:07:
I agree, Fred, just powering your PC with LPS or battery instead of supplied power brick or SMPS PSU isn't sufficient for realising high quality SQ from computer audio. There seems to be so much ground noise pollution on motherboards which ultimately finds it's way to USB connected audio devices via ground &/or signal wires that the only way to address this is to isolate & power individual sections of the PC. What this seems to do is to localise the ground noise to that section & prevent it from polluting the rest of the motherboard?
As you have done, treating the big sources of such current noise first is critical - anything which has large pulsed current draws is a candidate for this treatment - any electromechanical devices such as HDDs. Interestingly, memory is also a good candidate for such treatment as is USB ports.
You will find much more detail on that forum I suggested.
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Follow Ups
- RE: What measurements? - jkeny 01:52:39 11/21/15 (2)
- RE: What measurements? - fmak 12:08:16 11/21/15 (1)
- RE: What measurements? - jkeny 12:32:47 11/21/15 (0)